How many milliliter is 1 us cup of water?

1 us cup of water weighs approximately 237 milliliter. This is based on a density of 1 g/ml for water.

How do I measure water accurately?

Measure water in a liquid measuring cup placed on a flat surface. Read the measurement at eye level at the bottom of the meniscus.

Why does water have a specific cup-to-gram conversion?

Water has a density of 1 g/ml, meaning each milliliter weighs 1 grams. Different ingredients have different densities—for example, flour is lighter than sugar—which is why each needs its own conversion factor.

Water

US Cup to Milliliter

Ingredient

Amount

From

Result

237ml

high confidence USDA source

Water — Quick Reference

Common us cup to milliliter conversions

Water: US Cup to Milliliter conversion table
US Cup	Milliliter
¼ cup	59ml
⅓ cup	79ml
½ cup	118ml
⅔ cup	158ml
¾ cup	177ml
1 cup	237ml
1½ cups	355ml
2 cups	473ml

Based on water density of 1 g/ml (poured method). Source: USDA FoodData Central.

Understanding Water Conversions

The Math Behind This Conversion

Converting 1 us cup to milliliter is a direct volume conversion. One us cup equals 236.59ml, and one milliliter equals 1ml. So 1 us cup (236.59ml) equals 236.6 milliliter.

Measurement Tip

Measure water in a liquid measuring cup (the kind with a spout) placed on a flat surface. Read the measurement at eye level, looking at the bottom of the meniscus (the curved surface of the liquid). For sticky liquids like honey, lightly coat the measuring cup with oil first to help it slide out easily.

About Our Data

The density value of 1 g/ml for water is from the USDA FoodData Central database (ID: 174158). This measurement was taken with water poured into the measuring cup.

View source data on USDA FoodData Central (ID: 174158)

Frequently Asked Questions

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