Water: Cups to Grams Converter
Use ingredient estimates where supported, or convert volume and mass units. Check cooking measurement conventions.
Water: Estimate: 236.16 Grams
Density-based estimate: Air-free water at 20°C; density changes with temperature.
Air-free water at 20°C; density changes with temperature. NISTIR 7383 (2019), water-density example.
Water uses independently sourced density rather than a recipe chart’s cup weight. At 20°C, NIST’s air-free-water example is 0.99820675 g/mL. A customary cup therefore holds about 236.16 g (calculated). The familiar 1 mL ≈ 1 g shorthand is an approximation; density changes with temperature.
Common Amounts (estimates)
Density-based estimate: Air-free water at 20°C; density changes with temperature.
| Cups | Grams |
|---|---|
| 1/4 cups | 59.04 g |
| 1/3 cups | 78.72 g |
| 1/2 cups | 118.08 g |
| 2/3 cups | 157.44 g |
| 3/4 cups | 177.12 g |
| 1 cup | 236.16 g |
| 2 cups | 472.33 g |
Frequently Asked Questions
Last reviewed: · Source: NISTIR 7383 (2019), water-density example · see our methodology