Convert Grams to Cups: Cornstarch
Convert grams of cornstarch back to cups with this complete reference table. Starting from 128g = 1 cup, use the table below to find cups for any gram amount. This reverse conversion is useful when a recipe specifies grams but you only have measuring cups available. Note: 1 US cup = 240ml = 16 tablespoons.
Cornstarch Grams to Cups Table
| Grams | Cups |
|---|---|
| 25g | 0.2 cups |
| 50g | 0.39 cups |
| 75g | 0.59 cups |
| 100g | 0.78 cups |
| 125g | 0.98 cups |
| 150g | 1.17 cups |
| 200g | 1.56 cups |
| 250g | 1.95 cups |
| 300g | 2.34 cups |
| 400g | 3.13 cups |
| 500g | 3.91 cups |
| 750g | 5.86 cups |
Based on USDA FoodData Central data (1 US cup = 240ml = 16 tablespoons = 48 teaspoons). Note: Cornstarch (corn flour in UK) is a fine white powder. 1 cup = 128g. Used as a thickener for sauces and gravies. 1 tablespoon cornstarch = 2 tablespoons all-purpose flour as a thickener.
About Cornstarch Density
The density of cornstarch determines how much it weighs per unit of volume. At 0.533g/ml, 1 US cup (240ml) of cornstarch weighs 128g under USDA standard conditions.
Volume measurements can vary by ±10–20% depending on technique (sifted vs. spooned vs. scooped). For consistent baking results, use a kitchen scale with gram measurements whenever possible. The USDA standard (spooned-and-leveled) is the reference point for all values on this page.
Frequently Asked Questions
How many cups is 100g of cornstarch?
100g of cornstarch equals approximately 0.78 cups (based on 128g per 1 US cup).
How many cups is 200g of cornstarch?
200g of cornstarch equals approximately 1.56 cups.
How many cups is 500g of cornstarch?
500g of cornstarch equals approximately 3.91 cups.
Why convert grams to cups for cornstarch?
When a recipe lists grams but you only have measuring cups, you need to convert back. 128g = 1 cup is your baseline. Use a kitchen scale for the most accurate results.