Free · Transportation calculators 🚘

Fuel Quantity and Shared Trip Cost

Calculate trip fuel from distance and consumption, then multiply by price and split among travelers.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

Driving 300 km at 10 liters per 100 km uses 30 liters; at $2 per liter the trip costs $60, or $30 each for two travelers.

Fuel = distance / mpg; cost = price per gallon × fuel

Worked example

Enter these known values and leave the other values blank.

Car
Other vehicle
Fuel economy
10 L/100 km
Distance
300 km
Fuel price
2 USD / L
Number of people
2
Fuel used
30 L
Cost of the trip
60 USD
Cost per person
30 USD

Assumptions and limitations

  • The custom mode uses your measured fuel consumption. Vehicle presets are historical unversioned examples and are not current model-year specifications. Select Other vehicle for planning.
  • Price is per selected fuel-volume unit. Use the same currency across the calculation; alternate currency factors are captured values, not live exchange rates. Toll, parking, wear and time costs are excluded.
  • Bookify uses the exact 231-cubic-inch US liquid gallon consistently in fuel volume, price denominators and reciprocal mpg conversion.

Common questions

How should I interpret this result?

The custom mode uses your measured fuel consumption. Vehicle presets are historical unversioned examples and are not current model-year specifications. Select Other vehicle for planning.

Can I solve a missing input?

Clear the value you want to find, enter compatible known values, and check the displayed units. Some choices and one-way outputs cannot be solved backward.

References

US MPG uses the same exact US gallon as volume and price inputs. Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition.

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