Volume Converter
Convert litres, millilitres, US and UK gallons, pints, cups, fluid ounces and cubic units.
About the Volume Converter
US and UK (imperial) liquid measures share names but not sizes. A US gallon is exactly 3.785411784 L; a UK gallon is exactly 4.54609 L, about 20% bigger. A UK pint is 20 UK fluid ounces, a US pint 16 US fluid ounces.
A litre is a cubic decimetre: 1,000 litres make one cubic metre.
The formula
Result = Value × (size of the “from” unit ÷ size of the “to” unit)
- 1 L
- 1 L
- 1 mL
- 0.001 L
- 1 m³
- 1,000 L
- 1 gal (US)
- 3.785411784 L
- 1 qt (US)
- 0.946352946 L
- 1 pt (US)
- 0.473176473 L
Every volume unit is converted through litre using its exact definition.
Common conversions
| From | To |
|---|---|
| 1 gal (US) | 3.785411784 L |
| 1 L | 0.2641720524 gal (US) |
| 1 gal (UK) | 4.54609 L |
| 1 pt (UK) | 568.26125 mL |
| 1 pt (US) | 473.176473 mL |
| 1 cup (US) | 236.5882365 mL |
| 1 fl oz (US) | 29.57352956 mL |
| 1 m³ | 1,000 L |
| 1 ft³ | 28.31684659 L |
How to read your result
- Watch the (US) and (UK) labels: they give different answers.
- The table lists the same volume in every unit.
Worked example
Example: 2 us gallon = 7.570823568 L
- Inputs: Value: 2; From: US gallon (gal (US)); To: Litre (L).
- Formula: Result = Value × (size of the “from” unit ÷ size of the “to” unit)
- Multiply by the number of L in one gal (US) 2 × 3.785411784 = 7.570823568 L
- Result: 2 us gallon = 7.570823568 L
- 1 gal (US) = 3.785411784 L
- 1 L = 0.2641720524 gal (US)
Questions people ask
How many litres are in a gallon?
3.785 L in a US gallon, 4.546 L in a UK (imperial) gallon.
How many millilitres are in a cup?
A US customary cup is 236.6 mL. Nutrition labels in the US use 240 mL, and Australia, Canada and New Zealand use a 250 mL metric cup.