car trip fuel 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.

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: 22 Apr, 2024].

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Travel Cost Calculator

Quick links, trip pricing calculator.

Travelmath provides an online cost calculator to help you determine the cost of driving between cities. You can use this data to figure out a budget for a road trip. The driving calculation is based on the average fuel efficiency of your vehicle, and you can change the gas mileage in mpg or L/100 km to match your exact make and model. Gas prices are automatically estimated based on current fluctuations, and again you can adjust these to fit your local gas station prices. Both U.S. and international units are available to make the calculations easier to use, and the output is given for both one-way and round trip travel routes.

Check the driving distance for your planned route, and see if the total driving time requires an overnight stay. If it's a long trip, you may want to research some hotels along the way . Or compare whether it's better to fly or drive to your destination.

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Road trip gas calculator

Don't Just Estimate—Calculate and Optimize with Roadtrip

Welcome to the simple web version of Roadtrip's Fuel Calculator. More than just a calculator, this is your comprehensive guide to fuel cost planning, whether you're prepping for a quick commute or a grand road trip adventure.

Why Every Driver Needs Roadtrip's Gas and Fuel Calculator

• Pinpoint Accuracy : Tailor your calculations based on your car's actual mileage for the most accurate estimates.
• Speedy Results : In a few clicks, you can know exactly how much you'll spend on fuel.
• Any Device, Any Time : Our web-based Gas and Fuel Calculator is free and universally accessible.
• Updated in Real Time : Never get caught off guard by fluctuating fuel prices again.

The Roadtrip App: A World of Features Just a Click Away Download Here

Sure, our Gas and Fuel Calculator is handy, but why settle for basic when you can have it all with the Roadtrip app? Here's what you'll get:

• 🌎 Smart Route Planning : The app's geo-location features do the hard work for you, finding the most fuel-efficient path.
• 🔎 Just search for your car : We look up the specs of your car so you don't have to, ensuring our fuel calculator is as accurate as possible.
• ⚡️ Electricity Costs, Too : Own a hybrid or electric vehicle? The app adapts to include local electricity costs in your estimates. Try the EV calculator.
• 🌱 Carbon Emission Estimates : The app shows you the estimated carbon emissions for your trip based on how many gallons of gas or litres of petrol you use on your trip.

Bottom Line : If you find the Gas and Fuel Calculator useful, you'll find the Roadtrip app indispensable. Download it now and transform the way you plan your journeys.

How to Maximize Savings with Roadtrip's Gas and Fuel Calculator

• Input Distance : Start by entering the distance of your journey.
• Update Fuel Price : Use the most current local fuel prices for precise estimates.
• Include Your Car's Mileage : Customization is key—enter your car's mileage for an estimate that's uniquely yours.
• Calculate : Hit the button, and you'll get an instant, accurate estimate that helps you budget smarter for your trip.

Frequently Asked Questions

Q: Is the Gas and Fuel Calculator really accurate? A: Our Gas and Fuel Calculator is incredibly precise when given the right inputs. However, for a deeper dive into your trip costs, including live fuel prices, you'll want to download the Roadtrip app .

Q: How much does it cost to use the Gas and Fuel Calculator? A: It's entirely free. But for a full suite of planning tools and real-time updates, the Roadtrip app is your go-to resource .

Q: What extra features do I get with the Roadtrip app? A: Everything from real-time fuel price updates to route optimization is at your fingertips. Experience the difference today .

Download for free today!

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Fuel Economy Calculator

Our easy-to-use calculator allows you to determine a car's fuel economy using just two figures: the amount of fuel consumed during a journey and the distance of this trip.

To use the calculator, simply enter the distance you traveled and the amount of fuel you used to get from your origin to your destination and click the "Calculate" button. You will then receive an estimation of the average fuel economy.

Distance (D): Miles Km

Fuel Used (F): Gallons (US) Gallons (UK Imperial) Liters

How your fuel economy is calculated

Fuel economy is represented as the ratio of distance to fuel consumed. Where the imperial system of units is used, fuel economy measurements are given in MPG (miles per gallon). Where metric units are used, fuel economy measurements are given in either KPL or KMPL (kilometers per liter). A higher fuel economy ratio indicates a more fuel-efficient vehicle.

In some nations, fuel consumption rather than fuel economy is used to measure the fuel efficiency of a vehicle. Measured as L/100km (liters per 100 kilometers), fuel consumption measurements express how much fuel is consumed over a certain distance while fuel economy expresses how far a car can go on a certain amount of fuel. Consequently, a lower fuel consumption ratio indicates a more fuel-efficient vehicle. If you have calculated the KMPL of your car, just divide the number 100 by the KMPL figure to determine your car's fuel consumption.

Both fuel economy and consumption can be easily calculated if you know how far you have traveled and much fuel you used to travel this distance. You will get a more accurate result if you fill up your tank before you set off. Make sure your odometer is set to '0' and drive as you normally would. Then, when you feel you have driven far enough, go to a gas station, take note of how far you have traveled, and fill your tank once more, recording how much gas is required to get a full tank.

To calculate MPG, the following equation is used:

MPG = D / F

where ' D ' or distance is in miles and ' F ' or fuel is in gallons.

To calculate KMPL, the following equation is used:

KMPL = D / F

where ' D ' or distance is in kilometers and ' F ' or fuel is in liters.

If you want to convert MPG as measured in US gallons into KMPL, the following equations are used:

MPG = 2.352145836 × KMPL

KMPL = 0.425143707 × MPG

If you want to convert MPG as measured in imperial gallons into KMPL, the following equations are used:

MPG = 2.824810534 × KMPL

KMPL = 0.35400604 × MPG

You may also be interested in our Lease Mileage Calculator or Power to Weight Ratio Calculator

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Free Fuel Cost Calculator

Understanding your fuel expenses is crucial in managing your travel budget effectively.

Our Fuel Cost Calculator is designed to give you a quick and accurate estimate of your fuel costs, whether you're driving across town or across the country.

How It Works

‍ Our user-friendly tool calculates your fuel expenses based on three key inputs:

• Distance to be Travelled: Enter the total miles you plan to cover.
• Fuel Efficiency of Your Vehicle: Provide your vehicle's mileage (miles per gallon).
• Cost of Fuel: Input the current cost per gallon of fuel.

Just fill in these details and hit 'Calculate' to see your estimated fuel costs!

• Plan Your Budget: Get a clear idea of the travel expenses and manage your budget more effectively.
• Save Time: Quick and easy calculations save you the hassle of manual computations.
• User-Friendly: Designed for ease of use. No technical knowledge required!
• Free to Use: Absolutely no charges – calculate as many times as you need.

Tips for Fuel Efficiency

• Regular Maintenance: Keep your vehicle in top condition to ensure optimal fuel efficiency.
• Drive Smart: Avoid rapid acceleration and hard braking. Smooth driving can improve fuel economy.
• Check Tire Pressure: Properly inflated tires reduce rolling resistance and improve fuel consumption.

Fuel Consumption And Fuel Cost Calculator (gas Calculator)

This free fuel consumption calculator estimates the fuel cost of your trip based on average fuel consumption, trip distance, and fuel price! Use this gas calculator to find out consumption and price of the gas instantly!

Fuel Calculator

Table of contents, how to calculate fuel consumption, how to use gas calculator, why gas costs, public transportation, car-sharing or carpool, fuel-efficient vehicles, tune the engine, tire adjustment, proper motor oil, efficient travel planning, factors that impact the fuel prices, intervention by the government, financial markets, geographical area, weather or natural disasters, how does gas calculator work, what does mpg mean, gas mileage calculator.

Fuel Consumption And Fuel Cost Calculator (gas Calculator) English

Fuel consumption and fuel cost calculator (gas calculator) in other languages, how to add fuel consumption and fuel cost calculator (gas calculator) to my website.

You can easily add Fuel Consumption And Fuel Cost Calculator (gas Calculator) to your own website with the help of our code. Paste the code to your website and the calculator will appear on that spot automatically!

How to add Fuel Consumption And Fuel Cost Calculator (gas Calculator) widget to WordPress website?

Adding Fuel Consumption And Fuel Cost Calculator (gas Calculator) to your Wordpres website is fast and easy! Find the page to which you want to add the calculator, go to edit mode, click 'Text', and paste the code to there.

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Online Calculators

Gas Mileage Calculator

Calculator Use

Calculate fuel economy in automobiles in US or Metric units. Calculate vehicle fuel economy in mpg US (miles per US gallon), mpg Imp (miles per Imperial gallon), km/l (kilometers per liter) or fuel consumption in l/100km (liters per 100 kilometers).  Equivalent fuel economy/efficiency ratings are converted and shown for all units, mpg US , mpg Imp , km/l and l/100km .

• mpg = miles per gallon
• mpg US = miles per United States gallon
• mpg Imp = miles per Imperial gallon
• km/l = kilometers per liter
• l/100km = liters per 100 kilometers

How to Calculate Miles per Gallon or Kilometers per Liter

When you calculate miles/gallon (mpg) or kilometers/liter (km/l) you are calculating fuel economy in terms of distance per unit volume or distance/volume. The following outline is generally applicable to both calculations. When you calculate liters per 100 kilometers (l/100km) you are calculating volume per 100 units of distance.

If you track your gas usage you can evaluate your vehicle's fuel economy. This is how to calculate your mpg or your km/l yourself.

• Fill up your tank with fuel before you start a long trip or the block of time you want to track. For example, you may just want to track your weekly gas usage.
• Record the trip starting odometer reading at the time you fill up.
• Record the number of gallons or liters required to fill the tank once again. This is the total number of gallons or liters you used for the trip (or the time period).
• Record the trip ending odometer reading (this might also be the starting reading for your next trip).
• Ending Odometer Reading minus Starting Odometer Reading equals miles or kilometers traveled
• End - Start = Miles or Kilometers traveled
• Miles driven ÷ gallons used = miles per gallon = mpg
• Kilometers driven ÷ liters used = kilometers per liter = km/l

Gas Rate (or Fuel Rate)

What is it costing you in gas per mile?  Enter the price per gallon.  Gas rate = price per gallon divided by miles per gallon = price per mile .

What is it costing you in fuel per kilometer?  Enter the price per liter.  Fuel rate = price per liter divided by kilometers per liter = price per kilometer .

Mileage Rate (or Kilometer Rate)

Enter a price per mile or price per kilometer to calculate the total charge incurred on this trip.  This may be helpful for expense, tax deductions or lease-related calculations; in some situations you will be given or allowed a cost per unit mile or kilometer to cover the expense of using a vehicle.

How to Calculate Liters per Kilometers (l/100km)

When you calculate liters per 100 kilometers (l/100km) you are calculating volume per 100 units of distance, or fuel consumption rate.

• Fill up your tank with fuel before you start a long trip or the block of time you want to track.
• Record the number of liters required to fill the tank. This is the total number of liters you used for the trip.
• Ending Odometer Reading minus Starting Odometer Reading equals total kilometers
• End - Start = Kilometers
• 100 * liters used ÷ kilometers driven = liters per 100 kilometers = l/100km

Cite this content, page or calculator as:

Furey, Edward " Gas Mileage Calculator " at https://www.calculatorsoup.com/calculators/tools/gas-mileage-calculator.php from CalculatorSoup, https://www.calculatorsoup.com - Online Calculators

Last updated: October 7, 2023

Fuel cost calculator

Find out how much your journeys are costing you with our fuel calculator, fuel cost calulator, how to calculate fuel cost.

Calculate fuel costs for your car in 3 simple steps:

• Enter your car reg and fuel type, we'll calculate it's fuel efficiency (mpg).
• Tell us your mileage for a single trip or year
• We’ll give you a price based on one trip, or a break down of weekly and monthly based on your annual mileage

The price of petrol and diesel is always changing, so it helps to save money on fuel where you can. Knowing how much your car is costing you to run is the first step to shaving a few pounds off your bill. You can also check your current local fuel price using our petrol prices tool .

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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 .

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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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The route deemed to be the safest and simplest with minimal scope for error along the way. The default recommended route from Michelin.

The route offering the shortest distance to a destination via the most accessible roads. Journey times for this option will tend to be longer.

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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.

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Web Toll calculator

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Fuel Calculator India

Looking to calculate fuel cost for a trip in India? Use the Fuel Cost Calculator App! See total trip cost breakdown - fuel, toll and other charges, FasTag rates, toll booths, toll discounts. Travel on the cheapest or the fastest routes to your destination. For car, pickup truck, truck, bike, HCM, EME - across Indian NHAI and state highways, toll roads, bridges, and tunnels - FREE!

Business? Integrate Toll API for pre-trip, on-trip and post-trip fuel, toll and route information. 

Still not convinced? Just enter your origin, destination, Submit and see fuel cost in seconds. Fill the optional fields - mileage, toll etc. - to get more accurate results.

Electronic Toll gantry only accepting Toll tags

Toll plaza accepting Cash

Truck restricted routes

How to calculate tolls - tutorial

Check out the detailed usage guide to know more about how to use the toll calculator, how the calculator works and much more.

• Fuel (petrol, diesel, etc) cost 
• Toll plazas on map
• Toll rates ( for all payment methods)
• Cheapest and Fastest routes  
• Reorder stops (Traveling salesman problem)
• Truck complaint routes 

Learn more >

India toll guide

• How are Indian tolls calculated?
• How many toll gates are there in India?
• What are the toll rules in India?
• Is toll free for local residents in India?
• Is FasTag mandatory in India?

Explore how tolling works in India >

The Fuel Cost Calculator app is free for all vehicles - car, pickup truck, bike, HCM - except trucks. For truck toll calculation, subscribe to Web Toll Calculator . Alternatively, you can also download our mobile apps ( iOS or Android ). 

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