How to Convert Millilitres to US cups (ml to cup)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert millilitres into us cups by hand, with examples and a quick-reference table.
The conversion
To convert millilitres to us cups, multiply the value by 0.0042267571. To go the other way, divide by the same number (or multiply by 236.588). For a quick estimate, multiply by about 0.0042.
US cups = millilitres × 0.0042267571
Worked examples
- 3 ml = 0.01268 cup
- 12.5 ml = 0.052834 cup
- 75 ml = 0.317007 cup
Millilitres to US cups table
| Millilitres | US cups |
|---|---|
| 1 ml | 0.004227 cup |
| 2 ml | 0.008454 cup |
| 5 ml | 0.021134 cup |
| 10 ml | 0.042268 cup |
| 20 ml | 0.084535 cup |
| 25 ml | 0.105669 cup |
| 50 ml | 0.211338 cup |
| 100 ml | 0.422676 cup |
| 250 ml | 1.0567 cup |
| 500 ml | 2.1134 cup |
| 1,000 ml | 4.2268 cup |
Common questions
Is ml to cup exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US cups to Millilitres converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Millilitres to US cups Converter or browse all volume converters.
Run your own numbers: Millilitres to US cups Converter