Cups to Milliliters Calculator

Convert US cups to milliliters instantly.

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Enter your values and click Calculate

One US cup equals exactly 236.588 mL. Use this calculator to convert cup measurements to milliliters — essential when following international recipes or using metric measuring equipment.

How It Works

The formula is cups × 236.588 = milliliters. One US cup is defined as exactly 236.588 mL — equal to 8 US fluid ounces. This is not a round number because the US customary and metric systems were defined independently. Cup sizes vary significantly by country: a US cup = 236.588 mL, an Australian or metric cup = 250 mL, and a traditional UK imperial cup = 284 mL. This calculator uses the US cup standard, which is used in most American cookbooks and food labels. When following a recipe from Australia or Canada, the cup size difference is about 13.4 mL per cup — small for a single cup but noticeable when a recipe calls for 6 or 8 cups.

Examples

1 cup
Standard recipe cup.
Result: 1 cup = 236.59 mL
0.5 cup
Half cup.
Result: 0.5 cup = 118.29 mL

Frequently Asked Questions

Is a US cup the same as a metric cup?
No. A US cup = 236.588 mL. An Australian/metric cup = 250 mL. This calculator uses the US cup.
How many mL is 2 cups?
2 × 236.588 = 473.176 mL.
How many ml in a cup?
One US cup equals 236.588 milliliters, commonly rounded to 237 mL for practical use. A metric cup (used in Australia and Canada) equals 250 mL, so always check which cup standard your recipe uses — the 13 mL difference per cup adds up in recipes that call for several cups.
How do I convert half a cup to ml?
Half a US cup equals approximately 118 mL. Other common fractions: a quarter cup = approximately 59 mL, one third cup = approximately 79 mL, two thirds cup = approximately 158 mL. For any cup value, multiply by 236.588 to get the exact milliliter equivalent.

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