Water Grams to Cups Converter
Convert water grams to US cups and back using 236.6 grams per cup.
Relate water weight to US cup volume
Water is often treated as one gram per milliliter in kitchen work, making its mass and volume unusually easy to compare. This page uses 236.6 grams per US cup near room temperature. It is a practical rounded convention because water density changes slightly with temperature.
With the default input, 236.6 grams of water converts to exactly 1 US cup under the stated convention. Reversing direction converts 1 cup to 236.6 grams. The factor applies to water, not milk, oil, syrup, or another liquid with a different density.
Local calculation with no ingredient guesswork
The amount stays in your browser and is never uploaded. This tool does not identify a liquid or compensate for temperature and dissolved ingredients. For laboratory work or temperature-sensitive formulations, use measured density at the relevant conditions rather than a kitchen approximation.
Frequently Asked Questions
How many grams of water are in one US cup?
This page uses 236.6 grams for one US customary cup of water near room temperature.
Why is this not exactly 236.588 grams?
The cup volume is exact, but water density varies slightly with temperature, so the cooking convention is rounded.
Can I use this factor for milk or oil?
No. Other liquids have different densities and need their own weight-to-volume conversion.
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