Direct answer
How Many mL in a US Cup? 1 cup ≈ 236.588 mL
1 US customary cup equals about 236.588 milliliters. Quick cooking answer plus metric-cup caveat and converter links.
Question
How many milliliters are in a US cup?
1 US cup equals approximately 236.588 milliliters (mL).
1 US cup
≈ 236.588 mL
2 US cups
≈ 473.176 mL
Metric cup
250 mL
Explanation
US recipes usually mean the US customary cup, not the 250 mL metric cup used in many other countries.
Multiply US cups by 236.588 to get milliliters. Example: 2 cups ≈ 473.18 mL.
For dry ingredients by weight (flour, sugar), use density-aware gram charts instead of treating every cup as the same mass.
Important caveat
A metric cup is 250 mL. Using the wrong cup standard can throw off baking ratios.