Cup (US) to Millilitre Converter
Convert cup (us) (cup) to millilitre (ml) instantly, with the exact conversion factor and a table of common values.
How it works
Cup (US) and millilitre are both units of cooking, so converting between them is a single multiplication by a fixed factor — there is no rounding rule or regional variation to worry about.
The factor used here is exact: 1 cup is defined as 236.5882 ml. Results are shown to enough decimal places to stay useful for small values without turning large ones into noise.
The formula
Cup (US) → Millilitre
ml = cup × 236.5882
Millilitre → Cup (US)
cup = ml ÷ 236.5882
Worked examples
| Scenario | Working | Result |
|---|---|---|
| 0.25 cup | 0.25 × 236.5882 | 59.1471 ml |
| 0.33 cup | 0.33 × 236.5882 | 78.0741 ml |
| 0.5 cup | 0.5 × 236.5882 | 118.2941 ml |
| 0.75 cup | 0.75 × 236.5882 | 177.4412 ml |
When you'd use it
- Reading a recipe, spec sheet or label written in the other system
- Filling in a form that expects a specific unit
- Checking luggage, shipping or equipment limits
- Coursework and lab reports that require SI units
Common questions
How many millilitre are in a cup (us)?
One cup (us) equals 236.5882 millilitre. Multiply by that number to convert, or divide by it to go the other way.
Is the conversion exact?
The factor is exact by definition — these units are defined in terms of each other. Only the display is rounded, and you can copy the full-precision result.
Why does my answer differ slightly from another converter?
Almost always rounding. Some converters round the factor itself before multiplying, which compounds the error on large values. This one multiplies first and rounds only for display.