Cups to Milliliters Converter

About the Cups to Milliliters Converter

Convert US cups to milliliters using the standard conversion: 1 US cup = 236.588 mL. This calculator also shows liters, fluid ounces, and tablespoon equivalents for complete recipe conversion.

Cups to milliliters is one of the most frequently needed conversions when following international recipes. American recipes use cups as the primary volume measurement, while European and Asian recipes typically use milliliters or grams. Getting this conversion right is essential for recipe accuracy.

Note that a US cup (236.588 mL) differs from a metric cup (250 mL) and a Japanese cup (200 mL). This calculator uses the US customary cup standard. Always verify which cup definition your recipe uses.

When This Page Helps

Following international recipes, using metric measuring tools with US recipes, or scaling recipes up or down all require precise cup-to-mL conversion. This calculator handles the math and shows multiple useful unit equivalents together.

How to Use the Inputs

1. Enter the number of cups to convert.
2. The milliliter equivalent appears in the output panel.
3. Additional conversions (liters, fluid ounces, tablespoons) are also shown.
4. Use decimal values for fractional cups (e.g., 0.25 for 1/4 cup).
5. Compare the result with metric cup and Japanese cup equivalents below.

Example Calculation

Tips & Best Practices

• Quick reference: 1 cup ≈ 237 mL, 1/2 cup ≈ 118 mL, 1/4 cup ≈ 59 mL.
• A metric cup (250 mL) is about 6% larger than a US cup (237 mL).
• For water-based liquids, 1 mL weighs almost exactly 1 gram.
• Common fractional cups: 1/3 cup = 79 mL, 2/3 cup = 158 mL, 3/4 cup = 177 mL.
• Many modern measuring cups show both cups and mL markings.

Understanding Cup Measurements

The US customary cup was standardized at 236.588 mL (8 US fluid ounces). It derives from the US fluid ounce, which is 1/128 of a US gallon. The metric cup (250 mL) was designed as a convenient round number in the metric system.

When Precision Matters

For most cooking, the difference between US and metric cups (about 1 tablespoon per cup) is negligible. But in baking, especially for recipes with precise flour-to-liquid ratios, using the correct cup standard matters. When in doubt, convert to grams for dry ingredients and mL for liquids.

Common Cup Fractions in Milliliters

1/8 cup = 30 mL, 1/4 cup = 59 mL, 1/3 cup = 79 mL, 1/2 cup = 118 mL, 2/3 cup = 158 mL, 3/4 cup = 177 mL, 1 cup = 237 mL. These rounded values work well for everyday cooking.

Frequently Asked Questions

• How many mL in a cup?

  A US customary cup equals 236.588 mL. This is the standard used in American recipes. A metric cup (used in Australia and some other countries) is 250 mL, and a Japanese cup is 200 mL.

• Is 250 mL the same as 1 cup?

  Not exactly. 250 mL is one metric cup, used in Australia and New Zealand. A US cup is 236.588 mL, which is about 5.4% less than a metric cup. For most cooking purposes, the difference is small but can matter in precision baking.

• How do I convert 500 mL to cups?

  Divide 500 by 236.588: 500 / 236.588 = 2.113 US cups. So 500 mL is slightly more than 2 cups. For a metric cup, 500 / 250 = exactly 2 cups.

• What is the difference between US and metric cups?

  A US cup is 236.588 mL, while a metric cup is exactly 250 mL. The difference is about 13.4 mL (roughly 1 tablespoon). This difference matters most in baking, where precision is important.

• How many tablespoons in a cup?

  There are 16 US tablespoons in one US cup. Each tablespoon is approximately 14.787 mL. This means 1 cup = 16 tbsp = 48 tsp = 236.588 mL.

• Why do recipes use cups instead of milliliters?

  Cup measurements are traditional in American cooking and are convenient because standard measuring cups are widely available in US kitchens. However, milliliters (and grams) are more precise, which is why professional and international recipes prefer metric measurements.