Enter Trip Distance
Enter the one-way journey distance and choose kilometers or miles.
Example: 300 km
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Free Fuel Cost Calculator
Fuel Cost Calculator Estimate Your Trip Fuel Expense
Calculate estimated fuel required and trip cost using distance, vehicle fuel efficiency and fuel price.
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km/L
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L/100 km
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US MPG
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Imperial MPG
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Cost Split
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Trip Planner
Calculate Fuel Cost
Estimate fuel usage and journey expense
Enter one-way distance
Choose the unit used by your vehicle
km/L
Use your real-world average when possible
Price per liter
Used to calculate cost per person
Optional tolls, parking or other costs
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Use Real-World Fuel Efficiency
Actual fuel usage can differ from official vehicle ratings. For a more useful estimate, enter the average efficiency you normally achieve in similar driving conditions.
Simple Process
How to Calculate Fuel Cost
Estimate your trip expense in three simple steps.
Add Fuel Efficiency
Enter your vehicle's average efficiency using km/L, L/100 km or MPG.
Example: 15 km/L
Enter Fuel Price
Add the current price per liter or gallon and calculate your estimated trip cost.
Cost = Fuel × Price
Mathematics
Fuel Cost Calculator Formulas
The exact formula depends on how your vehicle's fuel economy is expressed.
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Using km/L
Divide total distance by kilometers per liter to estimate liters required.
Fuel = Distance ÷ km/L
Cost = Fuel × Price/L
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Using L/100 km
Multiply distance by liters per 100 km, then divide by 100.
Fuel = Distance × L/100km ÷ 100
Cost = Fuel × Price/L
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Using MPG
Divide distance in miles by miles per gallon to estimate gallons required.
Gallons = Miles ÷ MPG
Cost = Gallons × Price/Gallon
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Cost per Distance
Divide fuel-only trip cost by total distance to estimate running fuel cost per km or mile.
Cost/Distance = Fuel Cost ÷ Distance
Worked Example
Fuel Cost Calculation Example
Suppose you travel 300 km, your vehicle averages 15 km/L and fuel costs 1.50 per liter.
Distance
300 km
Efficiency
15 km/L
Fuel Price
1.50/L
Step 1: Calculate Fuel Required
300 ÷ 15 = 20 liters
Step 2: Calculate Fuel Cost
20 × 1.50 = 30.00
Result
30.00
The estimated fuel requirement is 20 liters and the estimated fuel cost is 30.00.
Fuel Cost Guide
Free Online Fuel Cost Calculator
Our free fuel cost calculator helps drivers estimate how much fuel a journey may require and how much the trip may cost. Enter your travel distance, vehicle fuel efficiency and fuel price to calculate an instant estimate.
The calculator supports several common fuel economy formats, including kilometers per liter, liters per 100 kilometers, US miles per gallon and Imperial miles per gallon.
What Is a Fuel Cost Calculator?
A fuel cost calculator is a trip-planning tool that estimates fuel consumption and journey expense using distance, vehicle efficiency and fuel price. It can help with road-trip budgeting, commuting estimates and general vehicle expense planning.
How Do You Calculate Fuel Cost for a Trip?
When efficiency is expressed as distance traveled per unit of fuel, first divide the trip distance by the vehicle's fuel efficiency. This estimates the amount of fuel required. Then multiply the estimated fuel amount by the price per liter or gallon.
How to Calculate Fuel Cost Using km/L
If your vehicle efficiency is measured in kilometers per liter, divide total kilometers traveled by km/L. For example, a 300 km journey in a vehicle averaging 15 km/L requires an estimated 20 liters of fuel.
How to Calculate Fuel Cost Using L/100 km
When consumption is measured in liters per 100 km, multiply the journey distance in kilometers by the L/100 km value and divide by 100. The result estimates the number of liters required for the trip.
How to Calculate Fuel Cost Using MPG
For MPG calculations, divide journey distance in miles by the vehicle's miles per gallon figure. This estimates gallons required. Multiply gallons required by the price per gallon to estimate fuel cost.
US MPG vs Imperial MPG
US and Imperial gallons are different sizes, so US MPG and Imperial MPG are not interchangeable. This calculator handles them separately and converts fuel volume internally when necessary.
How to Estimate Round-Trip Fuel Cost
Select the round-trip option when the entered distance represents one direction of the journey. The calculator doubles that distance before estimating fuel consumption and total fuel expense.
What Affects Real Fuel Cost?
Real-world fuel expenses can change because of traffic, road gradient, driving speed, weather, vehicle load, air conditioning, tire pressure, engine condition, route changes and fuel price fluctuations.
Why Use Real-World Fuel Efficiency?
A manufacturer's published efficiency figure may not match your actual driving conditions. Using your own measured average from similar journeys can often produce a more useful planning estimate.
Who Can Use This Calculator?
This tool can be used by commuters, road-trip planners, families, students, delivery drivers, fleet operators, business travelers and anyone who wants a quick estimate of journey fuel expenses.
Important Estimate Note
Calculator results are estimates only. Actual fuel usage and cost can differ because driving conditions, vehicle performance and fuel prices can change.
FAQ
Frequently Asked Questions
For km/L or MPG, divide distance by fuel
efficiency to estimate fuel required, then
multiply the fuel amount by the price per
liter or gallon.
Divide total kilometers by kilometers per liter.
Multiply the resulting liters required by the
price per liter.
Yes. Select Round Trip and the calculator doubles
the entered one-way distance before estimating
fuel required and cost.
US gallons and Imperial gallons have different
volumes. Therefore, US MPG and Imperial MPG
represent different fuel economy values.
Traffic, speed, weather, road conditions,
vehicle load, tire pressure, driving style,
route changes and fuel prices can all affect
real-world fuel consumption and cost.