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Gallon Calculator

Convert liquid volumes between US/UK gallons, quarts, pints, cups, fluid ounces, and metric units.

Formula shown0 inputs definedFree, no sign-up

Quick Summary

Use this when you need:
  • Convert kitchen recipes between US cups and metric volumes
  • Compare fuel tank sizes quoted in UK gallons and liters
  • Check brewery batch sizes in both barrels and metric units
You’ll get:Volume

Calculator Tool

How this is calculated

Formula:

volume_target = volume_source * (source_to_liters / target_to_liters)

In plain language:

Liters act as the hub: the tool multiplies by the source to liter factor and divides by the target to liter factor to report the desired volume.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

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What these terms mean

Volume

Volume used in the calculation.

When to use this calculator

  • Convert kitchen recipes between US cups and metric volumes
  • Compare fuel tank sizes quoted in UK gallons and liters
  • Check brewery batch sizes in both barrels and metric units
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