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Tank fill-up cost calculator

Calculate the cost of filling your tank to the desired level.

Your result

Complete the fields and calculate.

Calculation method and formula

Tank capacity [l] × (Desired fuel level [%] − Current fuel level [%]) ÷ 100 × Price per litre

Understand the inputs

Tank capacity
Unit: l. Use a measured value or your own assumption.
Current fuel level
Unit: %. Minimum 0. Maximum 100. Use a measured value or your own assumption.
Desired fuel level
Unit: %. Minimum 0. Maximum 100. Use a measured value or your own assumption.
Price per litre
Use a measured value or your own assumption.

Assumptions and limitations

Only the gap between starting and target level is filled. The target must not be lower. Charging loss means the share of grid energy that does not reach the battery.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Tank capacity
55 l
Current fuel level
20 %
Desired fuel level
100 %
Price per litre
1.8
Example result79.2 for the fill-up

Fuel needed: 44 l.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Tank fill-up cost calculator work?+

Tank capacity [l] × (Desired fuel level [%] − Current fuel level [%]) ÷ 100 × Price per litre. Only the gap between starting and target level is filled. The target must not be lower. Charging loss means the share of grid energy that does not reach the battery.

What assumptions should I consider for this result?+

Only the gap between starting and target level is filled. The target must not be lower. Charging loss means the share of grid energy that does not reach the battery. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

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