How many grams of water are in 1 US cup?

One US cup equals 236.588 mL, and since water's density is 1 g/mL, one US cup of water weighs approximately 236.6 grams.

Is the density of water always 1 g/mL?

Water's density is exactly 1 g/mL at 4 °C. At room temperature (~20 °C) it is ~0.998 g/mL — a difference of less than 0.2%, which is negligible for cooking and baking.

Does this work for milk, juice, or other liquids?

Only for pure water. Milk (~1.03 g/mL) and juice (~1.04 g/mL) are slightly denser, so their gram-to-cup conversions will differ slightly. This converter is calibrated for water only.

How many tablespoons are in a US cup?

There are exactly 16 US tablespoons in one US cup, and 3 teaspoons in one tablespoon (48 teaspoons per cup).

Can I convert cups back to grams?

Yes. Switch the direction toggle to "Cups to Grams" and enter your cup value. The converter multiplies by 236.588 to return the gram weight.

Water Grams to Cups Converter

Name: Water Grams to Cups Converter
Availability: InStock
Author: Nham Vu

Type grams of water and instantly see the equivalent in US cups, tablespoons, teaspoons, and milliliters.

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Summary

Type grams of water and instantly see the equivalent in US cups, tablespoons, teaspoons, and milliliters.

How it works

Enter the weight of water in grams (or US cups for the reverse direction).
The tool applies water's density of 1 g/mL to convert grams to milliliters.
Milliliters are then divided by 236.588 to get US cups.
Cups are multiplied by 16 for tablespoons and by 48 for teaspoons.
All four results update instantly as you type.

Use cases

Scale a baking recipe that lists water in grams to cup measurements.
Verify how much water to add when a recipe calls for a fraction of a cup.
Convert a hydration ratio (e.g. 65% hydration = 650 g water per 1 kg flour) to cups.
Calculate water volume for brewing coffee or tea by weight.
Cross-check kitchen scale readings against a measuring cup.
Convert bottled-water serving sizes listed in grams to familiar cup amounts.

Frequently Asked Questions

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Last updated: 2026-05-29 · Reviewed by Nham Vu