Free · Volume conversions

US Liquid Quarts to Gallons Conversion Calculator

Convert us liquid quarts to gallons with exact unit factors, editable results and an explained example.

  • Formula & worked example
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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.

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

Formula and method

4 US liquid qt = 1 US gal = 16 US cups. A gallon contains four quarts within the same system. Keep all measures US liquid for this worked example. Enter a known value in the units shown; editing a result solves the conversion in reverse.

4 US liquid qt = 1 US gal = 16 US cups

Worked example

Enter these known values and leave the other values blank.

Quarts
4 US qt
Gallons
1 US gal
Other
16 cups

Assumptions and limitations

  • A gallon contains four quarts within the same system. Keep all measures US liquid for this worked example.
  • The worked example uses the starting units. A unit selection preserves the quantity, so check the unit before entering a new number.
  • Where offered, a metric cup is 250 mL, a US legal cup is 240 mL, and the metric spoon choices are 5 mL and 15 mL. Fluid ounces measure volume rather than mass.

Common questions

Which volume convention does this conversion use?

A gallon contains four quarts within the same system. Keep all measures US liquid for this worked example.

How should I use a rounded result?

Keep enough digits for the accuracy of the original measurement. Display rounding changes the visible precision, while the calculation retains additional digits.

References

Prices per thousand US gallons use the same exact gallon as the volume inputs. The US customary cup uses one sixteenth of the exact US liquid gallon, replacing the rounded captured cup volume. The US fluid ounce uses one 128th of the exact US liquid gallon, replacing the rounded captured reciprocal factor. The US dry gallon uses one eighth of a 2150.42-cubic-inch bushel, replacing the rounded captured volume factor. Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition.

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