Cups to Milliliters
Result:
Enter a volume to convert.
Convert U.S. cups to milliliters. From is set to cups and To is set to milliliters. The result updates as you type. One U.S. cup is exactly 236.5882365 milliliters. Other units are on the volume converter. The other direction is milliliters to cups.
Cups to milliliters formula
NIST Handbook 44 (2024), Appendix C defines the U.S. gallon as 231 cubic inches. With the exact inch of 2.54 cm, that gallon is 3.785411784 liters. The cup on this page is one-sixteenth of that gallon.
1 cup = 3.785411784 ÷ 16 = 0.2365882365 L = 236.5882365 mL exactly.
Formula: milliliters = cups × 236.5882365.
The converter multiplies by that exact cup, then rounds the displayed result to five decimal places. This page does not use the imperial cup or the 240-milliliter nutrition-label cup.
Example: 1 cup is exactly 236.5882365 mL. The converter shows 236.58824 mL.
Cups to milliliters reference table
Each value below is the converter result at five decimal places, using the U.S. cup of 236.5882365 milliliters. Enter the same cups in the form above and the result should match. Sixteen cups are one gallon.
| U.S. cups | Milliliters |
|---|---|
| 0.25 | 59.14706 |
| 0.5 | 118.29412 |
| 0.75 | 177.44118 |
| 1 | 236.58824 |
| 1.5 | 354.88235 |
| 2 | 473.17647 |
| 3 | 709.76471 |
| 4 | 946.35295 |
| 8 | 1892.70589 |
| 16 | 3785.41178 |
Cups to milliliters examples
Recipes: 1 cup is 236.58824 mL, and 1/2 cup is 118.29412 mL.
A pint: 2 cups are one U.S. liquid pint and display as 473.17647 mL.
A gallon: 16 cups display as 3785.41178 mL. If a label means the 240 mL cup in 21 CFR 101.9(b)(5)(viii), enter 240 milliliters on the milliliters to cups page. That is 1.01442 cup, not 1.00000 cup.
Quick mental math (approximation)
To estimate milliliters, multiply the cups by 240. Example: 1 cup × 240 is about 240 mL. The exact result is 236.58824 mL.
This shortcut is an approximation. It runs about 1.4 percent high. Multiplying by 240 also matches the nutrition-label cup, which this page does not use as its definition. Use the converter or the exact formula for recipes you will scale, labels, or records.
Cups to milliliters FAQ
How many milliliters are in a cup?
One U.S. cup on this page is exactly 236.5882365 milliliters. The converter shows 236.58824 mL.
Is a cup 240 milliliters?
Not the cup on this page. For nutrition labeling, 21 CFR 101.9(b)(5)(viii) defines a cup as 240 milliliters. Enter 240 milliliters and the volume converter shows 1.01442 cup, not 1.00000 cup.
How many cups are in a gallon?
Sixteen U.S. cups are one U.S. gallon. Sixteen cups display as 3785.41178 mL, the same five-decimal gallon the volume converter shows.