Milliliters to Cups Formula Explained

4 min read•June 1, 2025•Reviewed: June 1, 2026

✓Reviewed by Apex Conversion Editorial Team · Last reviewed June 1, 2026

To convert milliliters to US cups, divide by 236.588 (or multiply by 0.00422675). The US cup is defined as 8 US fluid ounces, each of which equals 29.5735 mL, giving 8 × 29.5735 = 236.588 mL per cup.

The formula is the inverse of the cups-to-mL conversion. Because 236.588 is not a round number, a quick estimate of dividing by 240 is commonly used in cooking, introducing an error of only 1.4%.

The Formula

cups = mL ÷ 236.588
cups = mL × 0.00422675  (equivalent)

Worked examples:
  118 mL ÷ 236.588 = 0.499 cups  ≈ ½ cup
  237 mL ÷ 236.588 = 1.002 cups  ≈ 1 cup
  250 mL ÷ 236.588 = 1.057 cups  (= 1 metric cup)
  500 mL ÷ 236.588 = 2.113 cups  ≈ 2 cups
 1000 mL ÷ 236.588 = 4.227 cups  ≈ 4¼ cups

Quick estimate (÷ 240):
  500 mL ÷ 240 = 2.083 cups  (exact: 2.113 cups — off by 1.4%)

US Cup vs. Metric Cup

The US cup (236.588 mL) and the metric cup (250 mL used in Australia and Canada) differ by about 5.5%. When a recipe from Australia or Canada calls for '1 cup', it means 250 mL. If you use a US measuring cup (236.6 mL), you are measuring about 13.4 mL — roughly 1 tablespoon — less than intended.

For most savory cooking this difference is negligible. For baking, it can matter — particularly in recipes that are sensitive to liquid ratios, like custards, souffles, or bread. The safest approach for international baking recipes is to measure by weight or use mL directly.

Quick Tips

✓
Divide by 240 for a quick estimate — within 1.4% of exact.
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250 mL = 1 metric cup (AU/CA); 237 mL = 1 US cup — two values worth knowing.
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For small amounts below 60 mL, tablespoon equivalents are more practical than cup fractions.
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1 liter = 4.227 US cups — use this to scale large metric recipes.
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For exact baking, measure in mL on a kitchen scale or graduated measuring cup.