Fuel flow rate conversion calculator

Convert fuel volume flow to mass flow using the density supplied for your fuel.

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Flow amount

Direction

Fuel density (kg/L)

Your result

More options and calculation details

Volume flow unit

Mass flow unit

Density 0.8 kg/L is a hypothetical example. Obtain the fuel’s actual density at the relevant temperature; this tool does not provide fuel-property estimates.

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Updated 2026-09-19

How this conversion works

Mass flow equals volume flow multiplied by density. First convert the volume rate to liters per hour, then multiply by kilograms per liter.

For a reverse conversion, divide mass flow by density. Select US or Imperial gallons explicitly; these volumes are different.

Next: Flow rate converter

A worked example

10 liters per hour × 0.8 kilograms per liter = 8 kilograms per hour.

Next: Density converter

Before you use the result

Assumes density is constant over the entered flow. No corrections for pressure, temperature, fuel blends or meter calibration are made. Nonzero numeric inputs for these compound calculations are limited to 1e-40 through 1e40.

Next: Volume converter

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ToolOctopus. “Fuel flow rate conversion calculator.” Updated 2026-09-19. https://tooloctopus.com/fuel-flow-rate-conversion-calculator.

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