Volume Converter
Convert litres, gallons, cups, pints and cubic units.
| Millilitreml | 1,000 | |
| Litrel | 1 | |
| Cubic metrem³ | 0.001 | |
| Teaspoon (US)tsp | 202.8841 | |
| Tablespoon (US)tbsp | 67.628 | |
| Fluid ounce (US)fl oz | 33.814 | |
| Cup (US legal)cup | 4.1667 | |
| Cup (metric)cup | 4 | |
| Pint (US)pt | 2.1134 | |
| Pint (imperial)pt | 1.7598 | |
| Gallon (US)gal | 0.2642 | |
| Gallon (imperial)gal | 0.22 | |
| Cubic inchin³ | 61.0237 | |
| Cubic footft³ | 0.0353 |
All conversions go through the litre using exact internationally agreed factors; only the display is rounded.
About Volume Converter
Volume has more conflicting definitions than any other everyday unit family, and recipes are where it bites: a US pint and an imperial pint differ by a fifth.
This converter is explicit about which definition it uses for every unit, covering metric, US customary, imperial and cubic measures side by side.
How Volume Converter works in your browser
Volumes are converted through the litre, and each unit is explicit about which definition it uses. The US gallon (3.785 L) and imperial gallon (4.546 L) differ by about a fifth, and so do their pints, while cups come in US legal, US customary and metric sizes — all listed separately rather than guessed.
Volume cannot be converted to weight without knowing the density of the substance, so the tool deliberately does not offer that conversion.
When to use it
- Converting recipe measures between cups, millilitres and fluid ounces.
- Comparing fuel economy or tank sizes quoted in US and imperial gallons.
- Working out container capacity in litres from cubic dimensions.
Frequently asked questions
How many millilitres are in a cup?
It depends which cup. A US legal cup is 240 ml, a US customary cup about 236.6 ml, and a metric cup 250 ml. All three are listed separately.
How do I convert litres to gallons?
Divide by 3.785 for US gallons or 4.546 for imperial gallons. The two differ by about 20 percent.
US or imperial gallon?
Both. A US gallon is 3.785 litres and an imperial gallon is 4.546 litres, a difference of about 20 percent.
Is a cup a standard measure?
A US legal cup is 240 ml, a US customary cup is about 236.6 ml, and a metric cup is 250 ml. All three are listed.
Can I convert to weight?
Not directly - that depends on the density of the substance. Volume and mass are different quantities.