Convert cornstarch between grams, cups, ounces, pounds, kilograms, tablespoons, teaspoons and milliliters with the calculator and detailed conversion charts below. The default values shown are for dry cornstarch measured in a lightly filled, leveled US cup.
Popular cornstarch conversions
Cornstarch Conversion Calculator
Convert cornstarch weight and volume measurements using the cup standard in your recipe.
Cornstarch Grams to Cups, Ounces and Tablespoons Chart
Use this chart for common recipe and sauce-thickening amounts of cornstarch. Choose a different cup standard to update every cup-based conversion table on this page.
| Grams | Ounces | US Cups | Nearest 1/16 Cup | US Tablespoons |
|---|---|---|---|---|
| 1 g | 0.035 oz | 0.0089 cups | < 1/16 cup | 0.143 tbsp |
| 2 g | 0.071 oz | 0.0179 cups | < 1/16 cup | 0.286 tbsp |
| 3 g | 0.106 oz | 0.0268 cups | < 1/16 cup | 0.429 tbsp |
| 4 g | 0.141 oz | 0.0357 cups | 1/16 cup | 0.571 tbsp |
| 5 g | 0.176 oz | 0.0446 cups | 1/16 cup | 0.714 tbsp |
| 10 g | 0.353 oz | 0.0893 cups | 1/16 cup | 1.429 tbsp |
| 15 g | 0.529 oz | 0.1339 cups | 1/8 cup | 2.143 tbsp |
| 20 g | 0.705 oz | 0.1786 cups | 3/16 cup | 2.857 tbsp |
| 25 g | 0.882 oz | 0.2232 cups | 1/4 cup | 3.571 tbsp |
| 28 g | 0.988 oz | 0.25 cups | 1/4 cup | 4 tbsp |
| 30 g | 1.058 oz | 0.2679 cups | 1/4 cup | 4.286 tbsp |
| 40 g | 1.411 oz | 0.3571 cups | 3/8 cup | 5.714 tbsp |
| 50 g | 1.764 oz | 0.4464 cups | 7/16 cup | 7.143 tbsp |
| 56 g | 1.975 oz | 0.5 cups | 1/2 cup | 8 tbsp |
| 75 g | 2.646 oz | 0.6696 cups | 11/16 cup | 10.714 tbsp |
| 100 g | 3.527 oz | 0.8929 cups | 7/8 cup | 14.286 tbsp |
| 112 g | 3.951 oz | 1 cups | 1 cup | 16 tbsp |
| 125 g | 4.409 oz | 1.1161 cups | 1 1/8 cups | 17.857 tbsp |
| 150 g | 5.291 oz | 1.3393 cups | 1 5/16 cups | 21.429 tbsp |
| 200 g | 7.055 oz | 1.7857 cups | 1 13/16 cups | 28.571 tbsp |
| 224 g | 7.901 oz | 2 cups | 2 cups | 32 tbsp |
| 250 g | 8.818 oz | 2.2321 cups | 2 1/4 cups | 35.714 tbsp |
| 300 g | 10.582 oz | 2.6786 cups | 2 11/16 cups | 42.857 tbsp |
| 400 g | 14.11 oz | 3.5714 cups | 3 9/16 cups | 57.143 tbsp |
| 500 g | 17.637 oz | 4.4643 cups | 4 7/16 cups | 71.429 tbsp |
| 750 g | 26.455 oz | 6.6964 cups | 6 11/16 cups | 107.143 tbsp |
| 1,000 g | 35.274 oz | 8.9286 cups | 8 15/16 cups | 142.857 tbsp |
Cornstarch Cups to Grams and Ounces Chart
Volume-to-weight conversions can vary slightly with settling and measuring method. The table begins with dry cornstarch using the 112-gram US cup standard.
| Volume | Grams | Ounces | US Spoon Equivalent |
|---|---|---|---|
| 1 teaspoon | 2.33 g | 0.082 oz | 1 tsp |
| 1 tablespoon | 7 g | 0.247 oz | 1 tbsp |
| 1/8 cup | 14 g | 0.494 oz | 2 tbsp |
| 1/6 cup | 18.67 g | 0.658 oz | 2 tbsp + 2 tsp |
| 1/4 cup | 28 g | 0.988 oz | 4 tbsp |
| 1/3 cup | 37.33 g | 1.317 oz | 5 tbsp + 1 tsp |
| 3/8 cup | 42 g | 1.482 oz | 6 tbsp |
| 1/2 cup | 56 g | 1.975 oz | 8 tbsp |
| 2/3 cup | 74.67 g | 2.634 oz | 10 tbsp + 2 tsp |
| 3/4 cup | 84 g | 2.963 oz | 12 tbsp |
| 1 cup | 112 g | 3.951 oz | 16 tbsp |
| 1 1/4 cups | 140 g | 4.938 oz | 20 tbsp |
| 1 1/2 cups | 168 g | 5.926 oz | 24 tbsp |
| 2 cups | 224 g | 7.901 oz | 32 tbsp |
| 3 cups | 336 g | 11.852 oz | 48 tbsp |
| 4 cups | 448 g | 15.803 oz | 64 tbsp |
Cornstarch Ounces to Grams and Cups Chart
These are dry weight ounces, not fluid ounces. Dry ounces measure the mass of the cornstarch, while cups and spoons measure volume.
| Ounces | Grams | US Cups | US Tablespoons |
|---|---|---|---|
| 0.25 oz | 7.09 g | 0.0633 cups | 1.012 tbsp |
| 0.5 oz | 14.17 g | 0.1266 cups | 2.025 tbsp |
| 1 oz | 28.35 g | 0.2531 cups | 4.05 tbsp |
| 2 oz | 56.7 g | 0.5062 cups | 8.1 tbsp |
| 3 oz | 85.05 g | 0.7594 cups | 12.15 tbsp |
| 4 oz | 113.4 g | 1.0125 cups | 16.2 tbsp |
| 5 oz | 141.75 g | 1.2656 cups | 20.25 tbsp |
| 6 oz | 170.1 g | 1.5187 cups | 24.3 tbsp |
| 8 oz | 226.8 g | 2.025 cups | 32.399 tbsp |
| 12 oz | 340.19 g | 3.0374 cups | 48.599 tbsp |
| 16 oz | 453.59 g | 4.0499 cups | 64.799 tbsp |
| 32 oz | 907.18 g | 8.0999 cups | 129.598 tbsp |
Cornstarch Quick Measurement Reference
These commonly used cornstarch amounts are based on the stated dry, leveled measurement standard. For very small quantities, a small rounding difference may appear when converting back and forth between spoons and grams.
| Cornstarch Measure | Grams | Dry Ounces | Common Use |
|---|---|---|---|
| 1 teaspoon | 2.33 g | 0.082 oz | Small sauce adjustment |
| 1 tablespoon | 7 g | 0.247 oz | Slurry or light thickening |
| 2 tablespoons | 14 g | 0.494 oz | Small batch filling or glaze |
| 1/4 cup | 28 g | 0.988 oz | Published reference amount |
| 1/2 cup | 56 g | 1.975 oz | Larger baking or cooking batch |
| 1 cup | 112 g | 3.951 oz | Full chart basis |
How to Convert Cornstarch Measurements
Convert grams to cups
Convert cups to grams
For dry weight conversions, 1 ounce = approximately 28.35 grams and 1 pound = approximately 453.59 grams. For the US culinary volume used in this chart, 1 cup equals 16 tablespoons or 48 teaspoons.
US Cups, Metric Cups and Imperial Cups
Recipes from different countries may use different cup sizes. Because cornstarch is a dry ingredient, the gram amount in a cup changes when the cup volume changes. The converter lets you choose the cup standard used in your recipe.
| Cup Standard | Cup Volume Used | Approx. Cornstarch Weight | When It May Appear |
|---|---|---|---|
| US culinary cup | 240 mL | 112 g | American recipes |
| Metric cup | 250 mL | 116.67 g | Australian and metric-cup recipes |
| Imperial cup | 284 mL | 132.53 g | Some older UK or Commonwealth references |
Metric and imperial cup cornstarch amounts on this page are scaled from the stated 112 g per 240 mL US-cup standard. Dry powders do not compact perfectly uniformly, so volume conversions remain practical recipe estimates.
How to Measure Cornstarch Correctly
Cornstarch is a very fine powder that can settle during storage. For repeatable recipe results, measure it gently and avoid compressing it into a cup or spoon.
For Sauces and Gravies
Cornstarch is frequently mixed with a cool liquid before heating so it disperses smoothly. The amount needed depends on the recipe and desired thickness, not only on the weight conversion.
For Baking and Fillings
Small changes in starch quantity can affect softness, structure and set. Use grams when a recipe supplies them, especially in larger batches.
Using Cornstarch in Recipes
Weight Conversions
- Grams and kilograms: provide the most direct way to measure cornstarch by weight.
- Dry ounces and pounds: are also weight measurements and convert without relying on cup volume.
- Cups and spoons: are practical for recipes but can vary slightly with how the powder is handled.
Substitutions and Thickening
- Cornstarch: forms a smooth starch-based thickener when properly dispersed and heated.
- Flour: is a separate ingredient with different thickening behavior and flavor impact.
- Other starches: may not match cornstarch gram-for-gram or tablespoon-for-tablespoon in every recipe.
Frequently Asked Cornstarch Conversion Questions
How many cups is 28 grams of cornstarch?
Using this page’s standard of 112 grams per US cup, 28 grams of cornstarch equals 1/4 US cup.
How many grams are in 1 cup of cornstarch?
This chart uses 112 grams per US cup of cornstarch, derived from a published reference of 28 grams per 1/4 cup.
How many grams are in 1 tablespoon of cornstarch?
With 16 US tablespoons in a cup and 112 grams per cup, 1 US tablespoon of cornstarch is approximately 7 grams.
How many cups is 100 grams of cornstarch?
Using the default US cup standard, 100 grams of cornstarch is approximately 0.8929 cups.
Are ounces of cornstarch the same as fluid ounces?
No. Ounces in this chart mean dry weight ounces measured by mass. Fluid ounces measure volume. The calculator uses dry weight ounces for cornstarch weight conversions.
Can I use the flour conversion chart for cornstarch?
No. Flour and cornstarch have different weights per cup. Use the cornstarch conversion chart when the ingredient listed in the recipe is cornstarch.
Why might a measured cup of cornstarch weigh slightly differently?
Fine powders can settle or become compacted. Measuring method, storage and leveling can create small differences, so a digital scale is preferred when precision matters.
Conversion Methodology
This converter uses a published ingredient weight reference of 1/4 US cup cornstarch = 28 grams, equivalent to 1 US cup = 112 grams. Volume relationships use a practical culinary US cup of 240 mL, with 16 US tablespoons or 48 US teaspoons per cup. Metric and imperial cup results are calculated by scaling volume from the stated US-cup basis.
Accuracy note: Cornstarch volume conversions are approximate because real cup and spoon weights can vary with settling, compaction and leveling. When precision matters, use the gram measurement in the recipe.
Sources
- King Arthur Baking Company. Ingredient Weight Chart. Accessed May 29, 2026.
- National Institute of Standards and Technology. Metric Kitchen: Cooking Measurement Equivalencies. Accessed May 29, 2026.