Cornstarch vs All-Purpose Flour
Density, calorie, and weight differences — and whether they can substitute for each other.
Substitution Verdict
Density difference: 0%. Very similar — 1:1 substitution is usually safe.
Calories per 100 g: Cornstarch 381 kcal vs All-Purpose Flour 364 kcal. Difference: 17 kcal — Cornstarch is higher.
Weight Conversions (per Spoon and Cup)
| Measure | Cornstarch | All-Purpose Flour |
|---|---|---|
| 1 tablespoon | 8 g | 8 g |
| 1 teaspoon | 2.5 g | 2.7 g |
| 1 cup | 120 g | 120 g |
| Density | 0.5 g/ml | 0.5 g/ml |
Measuring Tips
Always make a slurry with cold liquid before adding to hot mixtures — clumps if added directly to hot liquid.
Spoon flour into measuring cup and level off — never scoop directly from the bag (compacts flour up to 25% denser).
Frequently Asked Questions
Can Cornstarch be substituted for All-Purpose Flour?▾
Very similar — 1:1 substitution is usually safe. Density of Cornstarch is 0.5 g/ml; All-Purpose Flour is 0.5 g/ml — a 0% difference. But flavor, moisture, and chemistry can still differ — verify suitability for the specific recipe.
How many grams in 1 tablespoon of Cornstarch vs All-Purpose Flour?▾
1 tbsp Cornstarch ≈ 8 g. 1 tbsp All-Purpose Flour ≈ 8 g. By weight: 1 tbsp Cornstarch = 1.00 tbsp All-Purpose Flour.
Which has more calories, Cornstarch or All-Purpose Flour?▾
Per 100 g: Cornstarch 381 kcal, All-Purpose Flour 364 kcal. Cornstarch has 17 more kcal.
What is Cornstarch typically used for?▾
Cornstarch is commonly used in: thickening sauces, Chinese stir-fry, fruit pie filling, custards. Source: king-arthur, usda-fdc.
What is All-Purpose Flour typically used for?▾
All-Purpose Flour is commonly used in: bread, cakes, cookies, pancakes. Source: king-arthur, usda-fdc.