Cups to mL converter: US cups in milliliters
1 US cup is 236.588 mL. To convert cups to mL, multiply the number of cups by 236.588.
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2 US cups =
473.176mL
Formula: mL = cup × 236.5882365
Show the steps
- Definition: 1 US cup = 8 US fl oz = 236.5882365 mL; 1 mL = 0.001 L = 1 cm³
- 2 cup × 236.5882365 = 473.176 mL
Definitions used: 1 US cup = 8 US fl oz = 236.5882365 mL; 1 mL = 0.001 L = 1 cm³.
Source: NIST Handbook 44 (2026), Appendix C and NIST SP 811, Appendix B.8, checked on .
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5 values converted.
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How to convert US cups to milliliters
Multiply the value in US cups by 236.5882365. The factor follows from the definitions: 1 US cup = 8 US fl oz = 236.5882365 mL, and 1 mL = 0.001 L = 1 cm³.
mL = cup × 236.5882365
Worked example: 2 cup to mL
- Definition: 1 US cup = 8 US fl oz = 236.5882365 mL; 1 mL = 0.001 L = 1 cm³
- 2 cup × 236.5882365 = 473.176 mL
- Answer: 2 cup = 473.176 mL.
US cups to milliliters chart
| US cups (cup) | Milliliters (mL) |
|---|---|
| 0.25 | 59.1471 |
| 0.5 | 118.294 |
| 0.75 | 177.441 |
| 1 | 236.588 |
| 1.5 | 354.882 |
| 2 | 473.176 |
| 3 | 709.765 |
| 4 | 946.353 |
| 5 | 1,182.94 |
| 6 | 1,419.53 |
| US cups (cup) | Milliliters (mL) |
|---|---|
| 8 | 1,892.71 |
| 10 | 2,365.88 |
| 12 | 2,839.06 |
| 16 | 3,785.41 |
| 20 | 4,731.76 |
| 24 | 5,678.12 |
| 30 | 7,097.65 |
| 32 | 7,570.82 |
| 40 | 9,463.53 |
Values rounded to 6 significant digits. Type any other number in the converter at the top of the page.
Why do some measuring cups say 240 mL?
Nutrition labels use a rounded cup. The FDA rule in 21 CFR 101.9 sets it at exactly 240 mL, which is 240 mL here. The customary US cup is 236.588 mL, a little smaller, so a label cup adds a little more with every cup you measure. Use the cup size the recipe names.
How many mL is a third of a cup?
A third of a US cup is 78.8627 mL and two-thirds is 157.725 mL. Halves and quarters are in the chart below.
More questions about US cups and milliliters
How many mL are in 3 cups?
3 cups is 709.765 mL.
How many fluid ounces are in a cup?
Eight US fluid ounces. One US fluid ounce is 29.5735 mL, so 8 × 29.5735 = 236.588 mL.
How many cups are in 500 mL?
500 mL is 2.11338 US cups, a little over two cups.
Which cup does this page use?
The US customary cup of 8 US fluid ounces, 236.588 mL. Nutrition labels use the 240 mL cup, which the cooking converter also lists.
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Sources and limits
- NIST Handbook 44 (2026), Appendix C
NIST Handbook 44-2026, Appendix C: General Tables of Units of Measurement.
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
- NIST SP 811, Appendix B.8
NIST Special Publication 811, Guide for the Use of the SI, Appendix B.8: Factors for Units Listed Alphabetically (page updated August 18, 2025).
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
- 21 CFR 101.9(b)(5)(viii)
Code of Federal Regulations, Title 21, § 101.9(b)(5)(viii): household measures for nutrition labeling (text in force when checked).
U.S. Food and Drug Administration. Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.