car trip price calculator

Trip Calculator

Trip vehicles, step 1 of 2. select one or more vehicles..

You can add, edit, and remove vehicles at any time.

You can edit vehicles to personalize the MPG and fuel prices.

In Step 2, you will enter the trip details including starting point, intermediate stops, and destination.

Enter the Trip

You will be able to modify the route by dragging the route line on the map.

The Trip Vehicles section above will be updated with the cost of fuel for the trip.

Directions and Map

This website is administered by Oak Ridge National Laboratory for the U.S. Department of Energy and the U.S. Environmental Protection Agency.

This website is administered by Oak Ridge National Laboratory for the U.S. DOE and the U.S. EPA.

Cost of Driving Calculator

Fuel cost calculator, cost to drive between cities.

Travelmath provides an online driving cost calculator to help you determine how much you'll spend on gas for your next road trip. You can enter airports, cities, states, countries, or zip codes to compute the cost of driving between locations. Driving distances are calculated using actual driving directions if they are available, or a GPS-accurate method for the straight line distance . Automatic estimates are provided for local gas prices and vehicle fuel efficiency in miles per gallon (mpg) or liters per 100 kilometers (L/100 km), based on the make and model of your car, SUV, or minivan. Don't let the economy and rising oil prices stop you from taking your next trip. You can use this tool to find out if it's cheaper to fly or drive to your destination.

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Fuel Calculator ⛽

Use this fuel cost calculator to easily calculate fuel cost and the gallons / liters needed to complete a trip. Calculate gas cost or petrol cost - we support miles and gallons, liters and km, etc.

Related calculators

• Fuel Needed & Fuel Cost Calculations

Variation in fuel consumption

• Formula for fuel amount
• How to improve fuel economy?

    Fuel Needed & Fuel Cost Calculations

In order to calculate the amount of fuel for a given trip using our fuel cost calculator or otherwise, you need to know the total distance you will be covering and the expected average fuel consumption of your vehicle. It works the same way for cars, trucks, buses, vans, SUVs, and even boats and planes. If you also want to calculate the fuel cost of a trip, then you need to know the price per gallon or price per liter at which you can by.

Our calculator supports entering distances in miles and kilometers. In terms of fuel consumption, it is very versatile as it accepts: miles per gallon, gallons per 100 miles, kilometers per liter and liters per 100 kilometers. In the US, miles per gallon and kilometers per liter would more frequently used, while in most of Europe the preferred metric would be liters to travel 100 km and gallons to cover 100 miles. The result in terms of fuel amount is in gallons or liters, and for fuel cost is in the currency you entered it in (you can simply ignore the currency sign, e.g. $ (USD)).

Make sure to account for the variation in fuel consumption when driving within city limits and on highways - usually the consumption is higher in the former case. Always fill your tank with more fuel than you anticipate you would need, especially during winter or when driving through desolate areas or when extreme weather conditions are expected.

    Formula for fuel amount

If you are using mpg (miles per gallon), then the formula for calculating the total amount of gas needed is:

Fuel = Distance / Consumption mpg

For example, if the distance is 500 miles and consumption is 20 miles per gallon, then the fuel you will need for the entire distance is 500 / 20 = 25 gallons.

If you are using gallons per 100 mi to measure consumption, then the formula for calculating the amount of fuel needed is:

Fuel = Distance / 100 x Consumption per 100 mi

For example, if the distance is 300 miles and the consumption is 5 gallons per 100 miles, you will need 300 / 100 x 5 = 15 gallons of gas.

Both formulas are applicable for metric units - km and liters, just make sure you do not mix metric units. Using an online fuel calculator will make sure you do not commit that mistake.

    How to improve fuel economy?

Don't like the numbers you see when you use our tool? If you wonder how you can improve the fuel efficiency of your vehicle so you can cover more miles (or kilometers) with less fuel, we have some tips that can result in significant savings, especially when applied consistently over time. Here is our list of 10 fuel efficiency tips :

• Drive sensibly - If you drive aggressively - too fast compared to other cars, constantly overtaking other vehicles, and rapid acceleration followed by braking, only to accelerate again wastes a lot of gas. By some estimates, quick starts and hard stops can increase fuel consumption by more than 30% ! This is why this is number one in our fuel efficiency list.
• Observe the speed limit - Different vehicles have optimal fuel economy at different velocities, but one way to increase gas mileage is to avoid driving at higher speeds. A small reduction of your average speed , say from 70 mph to 60 mph (equivalently: from 115 km/h to 100 km/h) can help you save 10 to 20% due to lower fuel consumption.
• Follow the leader - drive at about the speed of the vehicle in front of you, if they are following the first 2 tips above. This will make sure you need to accelerate and decelerate as little as possible. If possible, overtake drivers who do not follow them, as it will make it very hard for you to do so. This will result in smaller numbers from our fuel cost calculator.
• Check your tires - make sure your tire pressure is at optimal levels as indicated in the owner's manual provided by the auto manufacturer. If the pressure is too low your mileage will decrease significantly, not to mention that the car may become dangerous to drive.
• Smart routing - make sure you take optimal paths to reach your desired destination. Learn the different modes of route selection your GPS employs - the shortest is not always the fastest and idling stuck in traffic will waste fuel. Use services such as Google Maps to check for traffic congestions on the planned route. Using a route you know well can also help improve fuel efficiency, since you will know in advance where it makes sense to increase speed and where it does not, because of a traffic light just ahead.
• Air conditioning - turning it off will most likely improve your fuel efficiency by 10-15%, and will result in you having more power to accelerate quicker when needed. If it is necessary, make sure you do not set it to unreasonably low or high levels. Air temperature in the range between 64°F - 75°F (18°C - 24°C) is comfortable for most people. Due to the law of thermodynamics, each subsequent degree of heating or cooling requires progressively more energy to accomplish and maintain.
• Remove excess weight - make sure you remove any unneeded heavy items you have in your trunk. One of the untold benefits of losing weight is that your car will be a bit more efficient as well.
• Turn cruise control ON - when on a highway, make sure to use your cruise control option. By keeping your speed constant, it will most likely save gas and result in lower fuel costs.
• Avoid idling - idling means 0 miles per gallon and the larger the car engine, the more gas is wasted when idling. Avoid excessive idling, when possible, in line with point #5 above to keep fuel costs low.
• Maintain your vehicle - a well-maintained car, truck, van, SUV, etc. will operate at greater efficiency. Exact fuel savings are hard to calculate, as it will depend on the type of maintenance work your vehicle needs. However, good maintenance is sure to lead to fuel savings and smaller cost numbers coming out of our calculator.

All the above advice is fine, but what do you do if you have been following the above advice, yet our tool still shows you numbers that are so high you want to cry? Well, it is most likely time for a new car, or it could be just the fuel price fluctuations over which, unfortunately, neither you nor we have much influence, individually. Fuel prices in most places contain license fees and other state or local government taxes, in some places reaching as much as 50% of the final price. Financial market fluctuations, natural disasters or extreme weather, crisis, as well the geographical area you are in and the local fuel suppliers all influence the price of gas. All you can do is try to observe them and predict when you can get a more decent price.

Cite this calculator & page

If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation: Georgiev G.Z., "Fuel Cost Calculator" , [online] Available at: https://www.gigacalculator.com/calculators/fuel-calculator.php URL [Accessed Date: 04 Sep, 2024].

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Everyday Calculation

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Calculators » Home & Lifestyle » Trip Calculator

Trip Fuel Cost Calculator

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate amount of fuel consumed and estimated cost of fuel (gas) for a journey or road trip.

Trip Distance: Mile(s) Kilometer(s)

Fuel Economy: miles per gallon [US] miles per gallon [Imp.] kilometers per liter liters per 100 kilometers gallons [US] per 100 miles

Gas Price: per gallon [US] per gallon [Imp.] per liter

Android: Use this trip fuel calculator offline with our all-in-one calculator app.

Fuel consumption calculation

We calculate the total fuel required to cover the distance with your vehicles fuel economy number and then multiply that with the gas price to find the total fuel cost for the trip.

Select the fuel economy unit used in your country from the options provided viz., miles per gallon (mpg) , kilometers per liter (kmpl) , liters per 100 kilometers and gallons per 100 miles . Our calculator will take care of all conversions required for finding the total fuel consumption and trip cost.

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Fuel Cost Calculator

Fuel Cost Calculator is a tool to estimate gas costs for your trip. The gas cost calculator is calculated based on the distance in miles or km, miles per gallon, and the gas price per gallon.

Gas Mileage Calculator

The gas mileage calculator is useful for anyone who wants to calculate the costs of driving from one city to another. If you are planning a route trip and is price conscious, then gas costs is definitely something you may want to take into account. The distance, the mileage, and the total fuel costs can add burden to your budget especially if you are travelling long distance. With the rise in gas prices, the cost on fuel can get out of control quickly if you don't plan carefully. At fuel cost calculator, you can use our free gas estimator to help you estimate the total costs on gas and plan accordingly.

How the fuel cost calculator works?

The fuel cost calculator uses the trip distance, miles per gallon, and the current gas price to calculate the total cost when you travel from one location to another. 1. Trip Distance - the distance in miles or kilometers between the two locations. 2. Miles Per Gallon - the number of miles or kilometers that you can travel with 1 gallon of gas. You will travel fewer mileages per gallon when travelling locally, and many more mileages when you are on a highway. The miles per gallon is the average miles that you can travel with one gallon of gas. 3. Gas Price - the current gas price per gallon. With only these 3 inputs, the gas cost calculator will calculate the total costs for you.

How to save money on fuel cost?

There are many ways to save on fuel cost when you are travelling locally and sometimes in long distance. 1. Public Transportation - can sometimes save you money than driving. With driving, you may have to pay toll and stuck in traffic during rush hours. You may also need to pay for parking fees at your destination. With public transportation such as subway, you can often get away with traffic and can do activies that you like during commute such as reading or playing with your phone. If you are someone who does not enjoy driving, taking public transportation may not be a bad option. 2. Carpool - if public transportation is not an option. You can carpool with a coworker if you are driving to work. Carpool allows both of you to save money and having someone to keep you company while driving so you don't get bored. 3. Electric Car - you can also get an electric vehicle like a Tesla to save money on gas costs. With a gas car, you may spend more money on gas than the electricity cost of an electric car. It may be most costly upfront to buy an electric car, but it may save you money in the long run if you are using your car on a daily basis or travelling a lot.

Fuel Cost Table

The fuel cost table shows you the total costs based on your trip distance, price per gallon, and MPG.

Fuel Cost Between Two Addresses

If you are not sure the distance between two addresses, you can serach the fuel cost between two locations with our tool. The tool will return the straight line distance and driving distance between any two locations, and the estimated fuel costs that will take you from one location to the other.

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Fuel Cost Calculator

Table of contents

So you planned that trip, and now you are looking for a fuel cost calculator to ensure you will not need to sing for your dinner later. Well, you have come to the right place. Our fuel cost calculator helps you figure out the amount of fuel you will need for your trip. Additionally, it calculates the amount of money you will spend to buy gas to avoid any unexpected shortfall.

Keep reading if you would like to learn:

• The reason why you need to budget carefully for your trip.
• The formula we used to calculate how much gas you will need.
• How we calculated the total cost of gas for your road trip.
• Whether it is cheaper to drive or fly for your long-distance trip.
• How to take a road trip without breaking the bank.
• The process used to calculate the fuel cost per month.
• How much does a gallon of fuel weigh?

If your ideal vacation trip includes little green men on Mars, this space travel calculator may be just what you need.

Why you should know how much fuel you will need and the cost before buying gas for your trip

With the price of gas going up daily and your buying power steadily declining due to inflation, the unfortunate truth is that it is unwise to plan a road trip without first calculating the cost of gas. After all, gas is not the only thing you will need.

Before you plan your trip, you need to recognize that there can be lots of unexpected expenses when you are away from home. As such careful planning and a detailed budget are most important for a worry-free trip. You can typically expect to spend money on:

• Entertainment;
• Emergency repairs;
• Emergency medical care.

🙋 While we took care of the fuel price in this calculator, you may also check out our speed calculator to help you plan your activities. If you plan to lease a car for your trip, our car lease calculator may also interest you.

Process used by our fuel cost calculator to find how much gas you will need as well as the cost of your trip

To calculate how much fuel you will need, here is the formula used by our fuel cost calculator:

Fuel amount= Distance / Fuel efficiency

For instance, if you wish to travel 100 km with a vehicle with a fuel efficiency of 5 kilometers per liter , substitute these variables into the formula above:

Fuel amount= 100 / 5 = 20 liters

Our calculator also uses the amount of fuel and the cost of gas in your area to calculate the total cost of your trip. For this, we use the following formula:

Trip cost = Fuel amount × Fuel price

So using the amount of fuel given in the above problem, if the price of gas was $7 , then to calculate the amount of money needed for the trip, we put these values into the formula, and we get:

Trip cost = 20 × 7 = $140

What is the best way to take a road trip on a small budget?

If you are planning a road trip for your vacation, but your budget is relatively small, here are a few things you can do:

• Go during the offseason. Vacation rentals cost less in the offseason. This price reduction is because the demand for these places is relatively low during the off-season. So owners and agents reduce the price to attract more visitors.
• Take a road trip with others willing to share the cost. Sharing the cost will reduce your individual payment. For instance, if the fuel price for the trip is $1000, you will pay less by splitting that cost five ways between friends. You can do this using our gas cost calculator .
• Try camping to reduce the cost of accommodation. Campsites cost less than the average hotel.
• Research fun, entertaining activities that you and your friends can do free of cost or for a small fee. For example, use a map to explore with your team rather than hiring a tour guide.
• Pack food that you can quickly fix on the go rather than eating in restaurants. The cost of food can eat into your vacation money. As such, finding ways to eat for less can make the difference in the amount and type of activities you will be able to engage in.

Is it cheaper to drive or fly for long distances?

Due to the additional costs for items such as food and accommodation for several days, a road trip across great distances can cost significantly higher for long-distance trips than flying. This can, of course, be affected by these factors:

• Number of persons on the trip;
• Whether the cost is shared or not; and
• Type of accommodation used.

How do I calculate fuel cost?

To calculate the fuel cost, we use one of the following formulas:

• Fuel cost = (Distance / Efficiency per gallon) × Cost per gallon
• Fuel cost = (Distance / [100 × Consumption per 100 mi]) × Cost per gallon

Use the first formula if you have the car's efficiency in miles per gallon (mpg).

On the other hand, we use the second formula if the consumption is in gallons per 100 miles.

How do I calculate fuel cost per month?

To find the fuel cost per month:

• Multiply the distance per day by the number of days per month.
• Divide this by your vehicle’s efficiency per gallon.
• Multiply the answer by the price per gallon.

How much does a gallon of gas weigh?

A gallon of gasoline weighs approximately 6.073 lbs in the US.

Gasoline contains additives that affect its final weight. These vary from country to country. As such, it is impossible to give an exact weight worldwide.

Fuel efficiency

Fuel amount

Your trip calculator

With rising flight prices, you may be wondering: is it worth booking the ticket, or should I just drive? We're here to help you figure out what you might save (or spend) if you decide to load up the car and hit the road - or if taking to the skies is really the more affordable option.

Where are you going?

Estimates are based on an analysis of current and historical minimum roundtrip flight prices for one traveler and average car rental prices in the past 31 days. Actual prices may vary. Always check current prices and routes before booking. See Methodology .

Get inspired by other travelers

Check out these road trip guides to see how other travelers have navigated the open road.

Best road trip cars

Road trip hacks, best family road trip, best couples road trip games, best road trip snacks, road trips with dogs, methodology.

Fuel Cost Calculator

Want to know how much your next trip will cost for fuel? Just input a few details into our fuel cost calculator and you’ll get an instant fuel cost calculation and fuel consumption calculation for your one-way or return journey in the UK.

Fuel Needed (Litres)

Fuel Cost (Estimated)

How to use our fuel cost calculator

Our fuel cost calculator is extremely easy to use, just use the input box to enter the price you’re paying per litre of fuel , your vehicle’s MPG (miles per gallon) figure, and the distance you intend to drive.

What does MPG mean?

In a nutshell, MPG means how many miles a car can go for every gallon of fuel. MPG is usually given as a number, and it can be used to compare the fuel efficiency of different vehicles.

The higher the MPG rating, the more efficient a car is , so choosing a vehicle with a high MPG can help you save money on fuel over time.

How our fuel cost calculator works

Our calculator uses a very simple formula to determine how much you will have to pay at the pumps for your journey. We use the formula: (c ost per litre x distance) ÷ vehicle MPG x 4.546.

How our calculator determines the fuel quantity required

Again, our calculator uses a very simple formula to calculate the amount of fuel needed for the journey. We use the formula: distance ÷ vehicle MPG x 4.546 .

Who needs a fuel and mileage cost calculator?

Anyone who travels a lot, either for work or pleasure can use our fuel and mileage cost calculator to see how much it would cost to get from A to B and back.

Whether you’re going on a weekend getaway or driving up and down the country for work, this tool can help you to budget better by letting you know exactly how much you have to pay at the pumps.

How to improve your vehicle’s fuel efficiency and save money on fuel

With fuel prices on the rise, it is becoming increasingly important to find ways to improve your vehicle’s fuel efficiency.

Whether you have a car or van, there are several small adjustments that you can make that will help to reduce your fuel usage and save you money over time.

1. Check your tyre pressure regularly

Having the right tire pressure is essential for getting the most out of your fuel economy.

Underinflated tires cause more drag and decrease how efficiently your car runs. Make sure to check your tire pressure regularly and top them up as needed.

2. Reduce unnecessary weight in your car

It may not seem like much, but those extra few pounds can add up quickly when it comes to reducing your mileage.

Remove any unnecessary items from the boot of your car, such as sports equipment or heavy tools that you don’t use often. Every little bit helps.

3. Change your oil regularly

When oil gets too dirty, it can reduce engine performance and lead to decreased fuel efficiency. It is recommended that you get an oil change every 3-5 months (depending on the type of oil used) so that your engine stays clean and operates at its optimum level of performance.

4. Use cruise control whenever possible

Cruise control helps maintain consistent speeds which translates into improved mileage since you don’t have sudden starts and stops or fluctuating speeds while driving.

So if you are going on a long drive or even to another town, cruise control can be a great way to save some money on fuel.

5. Drive at steady speeds

Driving at steady speeds helps conserve fuel because when you accelerate quickly it uses up more fuel than when acceleration occurs slowly over time. Try driving at a steady speed whenever possible in order to maximize fuel efficiency.

6. Take care of your engine

Taking care of your engine is one of the best ways to ensure maximum fuel efficiency for your vehicle. Change air filters regularly and make sure all fluids are topped off so that it runs smoothly and efficiently.

7. Avoid idling

Idling your vehicle for extended periods of time wastes a lot of fuel and can significantly reduce fuel efficiency. Whenever possible, try to turn off the engine when you’re stopped instead of letting it idle.

8 . Avoid high speeds

Driving at higher speeds can decrease your fuel efficiency significantly. Whenever possible, try to keep your speed below the posted speed limit in order to maximize fuel efficiency.

9. Use eco mode

Most modern cars come with an eco mode, which you can use to help reduce fuel consumption and get better mileage.

This mode helps reduce engine power and alters your transmission shift points in order to conserve fuel.

10. Drive smarter

Last but not least, smart driving is the best way to reduce fuel usage and save money in the long run.

Smart driving techniques include accelerating slowly, avoiding sudden braking and idling, using cruise control, and following the speed limit.

By driving more efficiently you can reduce your overall fuel costs while also being kinder to the environment.

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USA Trip Calculator 🇺🇸

Embarking on a road trip across the United States is an adventure that promises endless memories and breathtaking sights. However, without proper planning, it can also come with unexpected expenses, especially when it comes to fuel costs. This is where Roadtrip's USA Trip Calculator steps in, offering a tailored solution for travelers seeking to manage their budget effectively while exploring the vast landscapes of the USA.

Why Choose Roadtrip's USA Trip Calculator?

Customized for your journey.

Our USA Trip Calculator is designed with the diversity of American road trips in mind. Whether you're cruising down the Pacific Coast Highway, traversing the historic Route 66, or exploring the scenic byways of New England, our tool provides tailored calculations based on your specific route, vehicle type, and current fuel prices.

Fast and User-Friendly

We know that planning a road trip should be more about excitement and less about hassle. That's why our calculator is designed for speed and ease of use. In just a few steps, you'll have a clear estimate of your trip's fuel costs, allowing you to budget effectively and spend more on experiences.

Always Accessible

The USA Trip Calculator is web-based, making it accessible from anywhere at any time. Whether you're at the planning stage at home or making adjustments on the road, our tool is available on any device, ensuring you have the information you need, when you need it.

Up-to-Date Information

Fuel prices can vary greatly across the United States, and they change frequently. Our calculator uses real-time data to provide the most current prices, ensuring your trip estimates are as accurate as possible.

The Roadtrip App: Elevate Your Road Trip Planning

While the USA Trip Calculator is a great start, the Roadtrip app brings your trip planning to a whole new level:

• Interactive Map-Based Planning : Use our app's interactive map to plot your route, discover points of interest, and calculate distances accurately.
• Vehicle Specific Calculations : Enter your vehicle's make and model to get specific fuel efficiency data, making your cost estimates even more precise.
• Local Fuel Prices : Get updated fuel prices for your entire route, helping you plan your refueling stops wisely and save money.
• Emission Estimates : For eco-conscious travelers, the app provides estimates of your trip's carbon emissions, helping you to make more sustainable travel choices.

How to Plan Your USA Road Trip for Maximum Savings

• Plot Your Route : Start by mapping out your journey, including all the major stops you plan to make. This helps in calculating the total distance of your trip accurately.
• Update Fuel Prices : Input the latest fuel prices, or let our app do it for you in real-time. This step is crucial for an accurate cost estimate.
• Enter Your Vehicle Details : Providing specifics about your vehicle ensures the calculator can accurately determine your fuel efficiency.
• Calculate : With all the details in place, hit calculate to receive an instant estimate of your trip's fuel costs.

Frequently Asked Questions

Q: How accurate is the USA Trip Calculator? A: Our calculator is highly accurate, provided you input the latest fuel prices and accurate vehicle information. For a more comprehensive planning tool, including live fuel prices and route optimization, the Roadtrip app is the ideal companion.

Q: Is there a fee to use the USA Trip Calculator? A: No, our calculator is completely free to use. For travelers seeking enhanced features and real-time updates, the Roadtrip app offers a full suite of planning tools.

Q: What additional features does the Roadtrip app offer? A: Beyond fuel cost calculations, the app offers route planning with interactive maps, live fuel price updates, vehicle-specific efficiency data, and carbon emission estimates. It's everything you need for a well-planned and budget-friendly USA road trip.

Planning a road trip across the United States doesn't have to be daunting or expensive. With Roadtrip's USA Trip Calculator and the comprehensive Roadtrip app, you have all the tools necessary to plan your journey efficiently, save on fuel costs, and focus on making unforgettable memories. Download the app today and start planning your dream road trip with confidence and ease.

Gas Mileage Calculator – Estimate Fuel Economy

Enter the distance driven in miles and the gasoline consumed in gallons to find the fuel economy in miles per gallon. You can also enter your odometer readings to calculate the distance traveled.

• Using Distance
• Using Odometer Readings

Calculate Using Distance Traveled

Calculate using current and previous odometer readings, have a question or feedback, gas mileage:.

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• Gas Mileage Calculator

How to Calculate Gas Mileage

Gas mileage formula, steps to calculate gas mileage.

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Stephen specializes in all aspects of the automotive world and has been an automotive enthusiast since childhood. He follows the global automotive industry closely, with an eye on the latest vehicle technologies.

Do you want to calculate fuel consumption in liters per 100 kilometers or kilometers per liter ?

Gas mileage, also known as fuel economy, is usually measured in miles per gallon, or MPG, in the US. It is a measure of how efficiently a vehicle uses fuel.

The better your fuel economy (the higher its MPG), the farther you can go on a gallon of gasoline, reducing your cost of traveling any given distance.

Fuel economy is affected by a number of factors, including:

• The size and weight of your vehicle
• The power output of its engine
• Its aerodynamics, or how smoothly it slips through the air
• The type of driving you do (city vs. highway)
• Your driving style (aggressive vs. gentle)
• The speed you drive (at the speed limit vs. over it)

While you cannot affect things like the size, weight, power, and aerodynamics of your vehicle (until you buy your next one, anyway), you can control your driving style and your speed. Gentle driving within the speed limit will definitely improve your fuel economy.

Our gas mileage calculator will let you easily determine your MPG, as well as any improvements you make to it through changes in your driving style.

You can use a simple formula to calculate gas mileage. Divide the distance driven (in miles) by the fuel used (in gallons) to find the fuel economy (in MPG).

MPG = distance [miles] ÷ fuel used [gallons]

For example , let’s find the fuel economy (in MPG) of a vehicle that drives 100 miles and uses 6 gallons of gasoline to get there.

fuel economy = 100 ÷ 6 fuel economy = 16.67 MPG

Try our fuel economy conversion calculators to convert MPG to L/100km or km/L.

To use this formula, you will need to know the distance driven (in miles) and the amount of fuel consumed (in gallons).

Start by completely filling up the tank in your vehicle. Make sure to record the vehicle’s odometer reading before you leave the gas station (or reset your trip odometer to zero).

Then, drive as you normally would until you stop to refuel.

At the gas station, record the new odometer reading (or check the number of miles you traveled on the trip odometer). Then, fill up your tank again and record the number of gallons it took to do this.

Determine the distance driven by subtracting the previous odometer reading from the current odometer reading (or refer to the reading on the trip odometer).

distance = current odometer – previous odometer

Now enter the distance driven (in miles) and the amount of fuel it took to fill the tank (in gallons) into the first formula shown above to find your gas mileage (in MPG).

Are you interested in trying to improve your fuel efficiency? Try our fuel savings calculator to calculate how much you could save by improving your gas mileage, along with some easy tips on how to do it.

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Mileage Calculator

Use the following mileage calculator to determine the travel distance, in terms of miles, and time taken by car to travel between two locations in the United States, disregarding traffic conditions.