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Fuel cost calculator

Estimate the fuel needed and its cost for a trip from distance and consumption.

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Need Fuel needed (L), Total cost? The Fuel cost calculator derives it from Distance (km), Consumption (L/100 km), Fuel price (per L) in one step. For instance, with Distance (km) = 500, Consumption (L/100 km) = 6.5 and Fuel price (per L) = $1.80 it returns Fuel needed (L) = 32.5 and Total cost = $58.50.

How to use it

  1. Enter your values: Distance (km), Consumption (L/100 km), Fuel price (per L).
  2. Read the result instantly: Fuel needed (L), Total cost.

Frequently asked questions

What does the Fuel cost calculator actually compute?

It takes Distance (km), Consumption (L/100 km) and Fuel price (per L) and derives Fuel needed (L) and Total cost from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

3 values: Distance (km), Consumption (L/100 km) and Fuel price (per L) ($). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Distance (km) = 500, Consumption (L/100 km) = 6.5 and Fuel price (per L) = $1.80, the calculator returns Fuel needed (L) = 32.5 and Total cost = $58.50. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Distance (km) = 550, Consumption (L/100 km) = 13 and Fuel price (per L) = $3.60 instead, Fuel needed (L) goes from 32.5 to 71.5 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Distance (km) = 450, Consumption (L/100 km) = 3.3 and Fuel price (per L) = $0.90, Fuel needed (L) comes out at 14.85. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Deciding between two cars, or between keeping one and replacing it: fuel or charging, insurance, depreciation and what a kilometre really costs.

What is the most common mistake?

Comparing on fuel alone. Depreciation is usually the largest line in the first years and dwarfs the difference in consumption between two comparable cars.

What is the difference between the Fuel cost calculator and the Fuel consumption calculator?

This one returns Fuel needed (L) and Total cost; the Fuel consumption calculator returns Consumption (L/100 km) and Fuel cost. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Fuel savings calculator is the closest one after this: Compare the yearly fuel cost of two cars and see how much you'd save.

What else is worth having open alongside it?

MPG calculator (fuel economy) and Fuel range calculator — they come up in the same task often enough to be worth a second tab.

Further reading

All guides →
How-toFuel Cost for a Road TripDivide distance by fuel economy, then multiply by the price. Here's the calculation, metric vs mpg, what pushes it up, and how to split the cost.How-toThe Real Cost Per Mile of Driving: Beyond Just FuelFuel is only part of what a mile costs. Add depreciation, insurance and maintenance to find your true cost per mile — and why it is higher than the pump suggests.GuideThe Real Cost of a Trip Is Not the FuelComparing a drive with a train ticket on fuel alone understates the car by a factor of five. Here is how to build the marginal cost of a trip, how to separate it from the fixed cost of ownership, and why both numbers are correct answers to different questions.ComparisonEV vs Gas: Comparing the Real Annual Running CostHow much does it actually cost to fuel an EV versus a gas car each year? We compare cost per mile from electricity and gasoline, plus the factors that swing the answer.ComparisonElectric or Petrol: From How Many Miles a Year Does It Pay Off?The break-even is a division, and the number underneath it moves more with where you charge than with which country you live in. Electricity and fuel prices from 2025 and 2026, the arithmetic in full, and the point at which an electric car stops saving anything at all.ExplainerWhat Is MPG (and How to Improve It)?MPG is how far a car goes on a gallon — higher is better. Here's what it means, how it relates to L/100 km, why your real figure is lower, and how to improve it.