How many us cup is 1 metric cup of water?

1 metric cup of water weighs approximately 1 us cup. 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

Metric Cup to US Cup

Ingredient

Amount

From

Result

1.1cup

high confidence USDA source

Water — Quick Reference

Common metric cup to us cup conversions

Water: Metric Cup to US Cup conversion table
Metric Cup	US Cup
¼ cup	0cup
⅓ cup	0cup
½ cup	1cup
⅔ cup	1cup
¾ cup	1cup
1 cup	1cup
1½ cups	2cup
2 cups	2cup

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

Understanding Water Conversions

The Math Behind This Conversion

Converting 1 metric cup to us cup is a direct volume conversion. One metric cup equals 250ml, and one us cup equals 236.59ml. So 1 metric cup (250ml) equals 1.1 us cup.

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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