How to Convert US cups to Millilitres (cup to ml)
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 us cups into millilitres by hand, with examples and a quick-reference table.
The conversion
To convert us cups to millilitres, multiply the value by 236.588. To go the other way, divide by the same number (or multiply by 0.0042267571). For a quick estimate, multiply by about 240.
Millilitres = us cups × 236.588
Worked examples
- 3 cup = 709.764 ml
- 12.5 cup = 2,957.35 ml
- 75 cup = 17,744.1 ml
US cups to Millilitres table
| US cups | Millilitres |
|---|---|
| 1 cup | 236.588 ml |
| 2 cup | 473.176 ml |
| 5 cup | 1,182.94 ml |
| 10 cup | 2,365.88 ml |
| 20 cup | 4,731.76 ml |
| 25 cup | 5,914.7 ml |
| 50 cup | 11,829.4 ml |
| 100 cup | 23,658.8 ml |
| 250 cup | 59,147 ml |
| 500 cup | 118,294 ml |
| 1,000 cup | 236,588 ml |
Common questions
Is cup to ml 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 Millilitres to US cups 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.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
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.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the US cups to Millilitres Converter or browse all volume converters.
Run your own numbers: US cups to Millilitres Converter