Liquid Volume Converter
Convert litres, millilitres, gallons, quarts, pints, cups and fluid ounces. US and UK (imperial) measures differ, so pick the right one.
Enter a value
Result
1 litres =
0.264172 gal (US)
1 × 0.264172 = 0.264172
1 US gallon = 3.785411784 L · 1 UK gallon = 4.54609 L
Show the working
- 1. Convert 1 L to litres: 1 × 1 = 1.
- 2. Convert to gal (US): 1 ÷ 3.78541 = 0.264172.
1 L in every unit
US and UK measures differ
- US cup
- 236.6 mL
- UK pint
- 568 mL
- US pint
- 473 mL
- Standard wine bottle
- 750 mL
Good to know: A US gallon is 3.785 L. A UK gallon is 4.546 L.
About this tool
Convert liquid volume between liters, gallons, milliliters, cups, and fluid ounces — used in cooking, brewing, and science.
Formula
1 US gallon = 3.785 L, 1 cup = 240 ml, 1 fl oz = 29.57 ml. Convert via liters as the base unit.
Reference values
- 1 US gallon = 3.785 liters
- 1 cup = 240 ml
- 1 fluid ounce = 29.57 ml
Questions people ask
How many litres are in a US gallon?
3.785 L. A UK (imperial) gallon is 4.546 L.
Is a US pint the same as a UK pint?
No. A US pint is about 473 ml and a UK pint is about 568 ml.
How many ml are in a cup?
A US cup is about 236.6 ml. Metric cups in some countries are 250 ml.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
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