Cornstarch: Cups to Grams
One US cup of cornstarch weighs about 120 grams (4.2 oz). Use the converter or the chart below for any amount.
Quick answer
- 1 cup cornstarch 120 g
- ¾ cup cornstarch 90 g
- ½ cup cornstarch 60 g
- ⅓ cup cornstarch 40 g
- ¼ cup cornstarch 30 g
- 1 tbsp cornstarch 7.5 g
- 1 tsp cornstarch 2.5 g
Approximate values. Density varies with how the ingredient is packed, sifted, or measured.
🛒 Shop Cornstarch on Amazon As an Amazon Associate we earn from qualifying purchases.
Popular cups-to-grams conversions
Tap any ingredient to convert it next — everything you need in one place.
Cornstarch cups to grams chart
| Amount | Grams | Ounces |
|---|---|---|
| 1/8 cup cornstarch | 15 g | 0.5 oz |
| 1/4 cup cornstarch | 30 g | 1.1 oz |
| 1/3 cup cornstarch | 40 g | 1.4 oz |
| 1/2 cup cornstarch | 60 g | 2.1 oz |
| 2/3 cup cornstarch | 80 g | 2.8 oz |
| 3/4 cup cornstarch | 90 g | 3.2 oz |
| 1 cup cornstarch | 120 g | 4.2 oz |
| 1 1/4 cups cornstarch | 150 g | 5.3 oz |
| 1 1/2 cups cornstarch | 180 g | 6.3 oz |
| 2 cups cornstarch | 240 g | 8.5 oz |
| 2 1/2 cups cornstarch | 300 g | 10.6 oz |
| 3 cups cornstarch | 360 g | 12.7 oz |
| 4 cups cornstarch | 480 g | 16.9 oz |
| 1 tablespoon cornstarch | 7.5 g | 0.3 oz |
| 1 teaspoon cornstarch | 2.5 g | 0.1 oz |
Cornstarch grams to cups
Working the other way? Since 1 cup of cornstarch is about 120 g, here is how common gram weights convert back to cups.
| Grams | Cups (approx) |
|---|---|
| 25 g cornstarch | 0.21 cups |
| 50 g cornstarch | 0.42 cups |
| 75 g cornstarch | 0.63 cups |
| 100 g cornstarch | 0.83 cups |
| 125 g cornstarch | 1.04 cups |
| 150 g cornstarch | 1.25 cups |
| 200 g cornstarch | 1.67 cups |
| 250 g cornstarch | 2.08 cups |
| 300 g cornstarch | 2.5 cups |
| 500 g cornstarch | 4.17 cups |
| 1000 g cornstarch | 8.33 cups |
Free Printable Conversion Chart
Every ingredient + oven temps, on one page you can print & pin to the fridge.
Measuring cornstarch accurately
Also called cornflour in the UK. Because a cup measures volume rather than weight, the most reliable way to get the same result every time is to weigh cornstarch on a kitchen scale and aim for the gram figure above. The conversions on this page are based on the US cup of about 236.6 ml.
FAQ
- How many grams is 1 cup of cornstarch?
- One US cup of cornstarch weighs about 120 grams (4.2 oz). Also called cornflour in the UK.
- How many grams is 3/4 cup of cornstarch?
- Three quarters of a US cup of cornstarch is about 90 grams (3.2 oz).
- How many grams is 2/3 cup of cornstarch?
- Two thirds of a US cup of cornstarch is about 80 grams.
- How many grams is 1/2 cup of cornstarch?
- Half a US cup of cornstarch is about 60 grams (2.1 oz).
- How many grams is 1/3 cup of cornstarch?
- One third of a US cup of cornstarch is about 40 grams.
- How many grams is 1/4 cup of cornstarch?
- A quarter of a US cup of cornstarch is about 30 grams.
- How many grams is 1 tablespoon of cornstarch?
- One tablespoon of cornstarch is about 7.5 grams, since a tablespoon is one sixteenth of a cup.
- How many cups is 100 grams of cornstarch?
- 100 grams of cornstarch is about 0.83 cups.