mL to Cups Converter
Convert millilitres to metric cups — 250 mL to the cup. Results update as you type; exact factors shown.
One millilitre is 0.004 cup (metric) — see the exact factor, not a rounded rule of thumb.
How the ml to cups 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 |
|---|---|---|
| 50 mL | 0.2 cup | millilitres to cup (metric) |
| 100 mL | 0.4 cup | millilitres to cup (metric) |
| 125 mL | 0.5 cup | millilitres to cup (metric) |
| 200 mL | 0.8 cup | millilitres to cup (metric) |
| 250 mL | 1 cup | millilitres to cup (metric) |
| 300 mL | 1.2 cup | millilitres to cup (metric) |
| 375 mL | 1.5 cup | millilitres to cup (metric) |
| 500 mL | 2 cup | millilitres to cup (metric) |
| 600 mL | 2.4 cup | millilitres to cup (metric) |
| 750 mL | 3 cup | millilitres to cup (metric) |
| 1,000 mL | 4 cup | millilitres to cup (metric) |
| 2,000 mL | 8 cup | millilitres to cup (metric) |
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 mL in a cup?
250 mL in a metric cup, used in Australia and New Zealand. A US customary cup is 236.6 mL and a US legal cup 240 mL.
What is 500 mL in cups?
Two metric cups.
Does the cup size matter in baking?
For liquids, rarely. For flour and sugar the 5% difference between a metric and a US cup compounds across a recipe, so follow one system throughout.
What is a half cup?
125 mL.
Why does the US have two cups?
The customary cup is 236.588 mL; the legal cup used on nutrition labels was rounded to 240 mL.
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.