This converter turns US cups into milliliters instantly, using the exact factor 1 US cup = 236.5882365 milliliters. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition. One thousandth of a litre, equal to one cubic centimetre.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US cups- The amount you are converting, measured in US cups
236.5882365- The exact number of milliliters in one US cup
milliliters- The converted result
How it works, step by step
- Enter the number of US cups you want to convert.
- The value is multiplied by 236.5882365, the exact conversion factor.
- The result is displayed in milliliters, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US cups
Multiply 5 by 236.58824. That gives 1,182.94 milliliters. A quick sanity check: one US cup is larger than one milliliter, so the number should get bigger — and it does.
Converting 72 US cups
72 × 236.58824 = 17,034.35 milliliters. Working backwards, 17,034.35 ÷ 236.58824 returns 72 US cups, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many milliliters are in one US cup?
Exactly 236.5882365. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US cups to milliliters?
Milliliters = US cups × 236.5882365. To reverse it, divide instead: US cups = milliliters ÷ 236.5882365, which is the same as multiplying by 0.004226752838.
Is the US cup bigger than the milliliter?
Yes. One US cup equals 236.588 milliliters, so it is the larger unit.
Why does my answer differ slightly from other cups to ml converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
What is a milliliter?
One thousandth of a litre, equal to one cubic centimetre.
Us Cups to milliliters reference table
| Us Cups | Milliliters |
|---|---|
| 0.5 cup | 118.2941 mL |
| 1 cup | 236.5882 mL |
| 2 cup | 473.1765 mL |
| 3 cup | 709.7647 mL |
| 5 cup | 1,182.94 mL |
| 10 cup | 2,365.88 mL |
| 15 cup | 3,548.82 mL |
| 20 cup | 4,731.76 mL |
| 25 cup | 5,914.71 mL |
| 50 cup | 11,829.41 mL |
| 75 cup | 17,744.12 mL |
| 100 cup | 23,658.82 mL |
| 250 cup | 59,147.06 mL |
| 500 cup | 118,294.12 mL |
| 1000 cup | 236,588.24 mL |
Exact factor: 1 US cup = 236.5882365 milliliters. Values rounded for display.