Cups to Litres Converter
Convert US cups to litres — one cup is 236.6 ml. Results update as you type; exact factors shown.
One US cup is 0.2366 litres — see the exact factor, not a rounded rule of thumb.
How the cups to litres converter works
Volumes convert through the litre (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common volume conversions
| From | To | Units |
|---|---|---|
| 1 US cup | 0.2366 L | US cup to litres |
| 2 US cup | 0.4732 L | US cups to litres |
| 3 US cup | 0.7098 L | US cups to litres |
| 4 US cup | 0.9464 L | US cups to litres |
| 4.227 US cup | 1.0001 L | US cups to litres |
| 5 US cup | 1.1829 L | US cups to litres |
| 6 US cup | 1.4195 L | US cups to litres |
| 8 US cup | 1.8927 L | US cups to litres |
| 10 US cup | 2.3659 L | US cups to litres |
| 12 US cup | 2.8391 L | US cups to litres |
| 16 US cup | 3.7854 L | US cups to litres |
| 20 US cup | 4.7318 L | US cups to litres |
Units in this converter and their exact factors
| Unit | Symbol | One unit in litres |
|---|---|---|
| millilitre | mL | 0.001 litre |
| litre | L | 1 litre |
| cubic metre | m³ | 1,000 litre |
| teaspoon (metric) | tsp | 0.005 litre |
| tablespoon (metric) | tbsp | 0.015 litre |
| cup (metric) | cup | 0.25 litre |
| US fluid ounce | US fl oz | 0.0295735296 litre |
| US cup | US cup | 0.2365882365 litre |
| US pint | US pt | 0.473176473 litre |
| US gallon | US gal | 3.785411784 litre |
| imperial fluid ounce | imp fl oz | 0.0284130625 litre |
| imperial pint | imp pt | 0.56826125 litre |
| imperial gallon | imp gal | 4.54609 litre |
| cubic foot | ft³ | 28.316846592 litre |
FAQFrequently asked questions about volume conversion
How many litres is 4 cups?
0.946 L, just under a litre.
Which cup does this use?
The US customary cup, 236.588 ml. A metric cup is 250 ml and an old imperial cup 284 ml.
Does a US cup equal a metric cup?
No — the metric cup is about 5.7% larger, enough to matter in baking.
How many cups in a litre?
4.227 US cups.
Should I convert cups to weight instead?
For baking, yes. A cup of flour can vary by 20% depending on packing; grams do not.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.