Check the recipe’s country
US customary, US legal and metric cups have different millilitre definitions.
Unit converter
Cups to mL Converter
Convert US cups to millilitres instantly. US cups versus metric cups. See the formula, worked examples and practical reference values.
How to convert US cup to mL
US cups to millilitres is useful for metric recipe preparation. The US legal cup and other regional cup definitions may differ.
Formula: mL = US cup × 236.588237
Reverse formula: US cup = mL × 0.004227
Worked example
1 US cup = 236.588237 mL
- = 0.236588 L
- = 8 US fl oz
- = 0.0625 US gal
Avoid these errors
Common mistakes
Do not assume every ingredient has water’s density
Millilitres measure volume; grams measure mass, and their relationship depends on the ingredient.
Useful for: US recipe cup volumes converted to millilitres.
Common US cup to mL conversions
| US cups | millilitres |
|---|---|
| 0.25 US cup | 59.147059 mL |
| 0.5 US cup | 118.294118 mL |
| 1 US cup | 236.588237 mL |
| 1.5 US cup | 354.882355 mL |
| 2 US cup | 473.176473 mL |
| 3 US cup | 709.764709 mL |
| 4 US cup | 946.352946 mL |
| 8 US cup | 1,892.705892 mL |
About the units
A US cup is an US customary unit represented by US cup. A millilitre is a metric unit represented by mL. Calculations use the same authoritative registry as the full volume converter, retaining full precision until display.
Sources and definitions
NIST — SI units and conversion guidance
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.