Liquids
Water: gram to US cup
1 gram of Water = 0 US cup — based on a density of 1 g/ml.
| gram | US cup |
|---|---|
| 5 | 0 |
| 10 | 0 |
| 25 | ⅛ |
| 50 | ¼ |
| 75 | ⅓ |
| 100 | ⅓ |
| 125 | ½ |
| 150 | ⅔ |
| 200 | ⅞ |
| 250 | 1 |
| 500 | 2⅛ |
| 1,000 | 4¼ |
Why the ingredient matters
A cup is a volume, not a weight. Water has a density of 1 g/ml — different ingredients give different weights for the same cup. That's why generic « cup to gram » charts are wrong by 10–30 %.
How precise is this?
The density used here is sourced and cross-checked. Real-world measures still vary by about ±1% depending on how the cup is filled — sifted, scooped or packed.
Data sources
- USDA FoodData Central — Public domain (US government work)
- ANSES Ciqual — table de composition — Licence Ouverte / Open Licence (Etalab)
Frequently asked questions
How many US cup is 1 gram of Water?
1 gram of Water equals about 0 US cup, using a density of 1 g/ml.
Is a US cup the same as a metric cup?
No — a US cup is 236.6 ml, a metric cup 250 ml, an imperial cup 284 ml. This page uses the US cup; the converter lets you switch conventions.
Why do different sites give different answers?
Most charts use one generic density for every ingredient. We use the measured density of Water itself — that is the physically correct conversion.
Should I weigh ingredients instead of using cups?
Yes, whenever possible — a scale removes fill-density error entirely, especially for flour and powders.