Other ingredients
Cornstarch: US cup to gram
1 US cup of Cornstarch = 128 gram — based on a density of 0.54 g/ml.
| US cup | gram |
|---|---|
| 0.125 | 16 |
| 0.25 | 32 |
| 0.333 | 43 |
| 0.5 | 64 |
| 0.75 | 96 |
| 1 | 128 |
| 1.5 | 192 |
| 2 | 256 |
| 3 | 383 |
| 4 | 511 |
Why the ingredient matters
A cup is a volume, not a weight. Cornstarch has a density of 0.54 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 ±8% depending on how the cup is filled — sifted, scooped or packed.
Data sources
- USDA FoodData Central — Public domain (US government work)
- King Arthur Baking — Ingredient Weight Chart — Reference chart (published factual values)
Frequently asked questions
How many gram is 1 US cup of Cornstarch?
1 US cup of Cornstarch equals about 128 gram, using a density of 0.54 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 Cornstarch 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.