How to use this calculator
- Enter a volume.
- Choose the from and to units. US and UK (imperial) gallons, pints and fluid ounces are different, so pick the right one.
- See all equivalents in the table.
Formula
The US gallon is defined as exactly 231 cubic inches; the UK imperial gallon as exactly 4.54609 liters.
1 US gal = 3.785411784 L = 4 qt = 8 pt = 16 cups = 128 fl oz
1 US cup = 236.588 mL; 1 tbsp = 14.787 mL; 1 tsp = 4.929 mL
1 UK gal = 4.54609 L = 160 UK fl oz
Examples
- 5 US gal × 3.785411784 = 18.93 L.
- 2 L ≈ 8.45 US cups.
Frequently asked questions
Why are US and UK gallons different?
They come from different historical definitions. A UK gallon is about 20% larger than a US gallon.
Is a 'metric cup' the same as a US cup?
No. A metric cup (used in Australia and elsewhere) is 250 mL, slightly more than a US cup (236.6 mL).
How many liters is a cubic foot?
About 28.3168 L.