Free · Unit conversions

US & Imperial Gallons and Pints Converter

Convert us & imperial gallons and pints with explained unit conventions and editable results.

  • Formula & worked example
  • Private in your browser
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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

1 US gallon = 8 US liquid pints = 0.003785411784 m³. There are eight liquid pints per gallon within either system, but US and imperial pints are different sizes. The separate columns keep those systems distinct.

1 US gallon = 8 US liquid pints = 0.003785411784 m³

Worked example

Enter these known values and leave the other values blank.

US gallons
1 US gal
UK gallons
0.83 UK gal
US pints
8 US pt
UK pints
6.7 UK pt
Other units
0.0037854 m³

Assumptions and limitations

  • There are eight liquid pints per gallon within either system, but US and imperial pints are different sizes. The separate columns keep those systems distinct.
  • Changing a unit preserves the underlying quantity. Check the selected unit before entering a new number; rounded display digits do not improve measurement accuracy.

Common questions

Which unit definition does this tool use?

There are eight liquid pints per gallon within either system, but US and imperial pints are different sizes. The separate columns keep those systems distinct.

Can I calculate in reverse?

Yes. Leave the original input blank and enter the known result. The inverse calculation uses the same unit definition.

References

Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition. The US fluid ounce uses one 128th of the exact US liquid gallon, replacing the rounded captured reciprocal factor. The US customary cup uses one sixteenth of the exact US liquid gallon, replacing the rounded captured cup volume.

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