Kitchen Density Converter
All-Purpose Flour: Cups to Grams Conversion
Exact weight conversions, volume-to-mass ratios, and baking guidelines for all-purpose flour.
One US customary cup of All-Purpose Flour weighs approximately 120 grams (or 4.2 oz) when using the professional spoon-and-level measurement method. One level tablespoon weighs 7.5 grams.
Convert All-Purpose Flour Volume to Weight
All-Purpose Flour Measurement Chart
Complete volumetric to gravimetric equivalent table for common baking measurements.
| Volume (US Cups) | Grams (g) | Ounces (oz) | Equivalent Tablespoons |
|---|---|---|---|
| 1/8 cup (2 tbsp) | 15 g | 0.53 oz | 2 tbsp |
| 1/4 cup (4 tbsp) | 30 g | 1.06 oz | 4 tbsp |
| 1/3 cup (5 tbsp + 1 tsp) | 40 g | 1.41 oz | 5.3 tbsp |
| 1/2 cup (8 tbsp) | 60 g | 2.12 oz | 8 tbsp |
| 2/3 cup | 80 g | 2.82 oz | 10.7 tbsp |
| 3/4 cup (12 tbsp) | 90 g | 3.17 oz | 12 tbsp |
| 1 cup (16 tbsp) | 120 g | 4.23 oz | 16 tbsp |
| 1 1/2 cups | 180 g | 6.35 oz | 24 tbsp |
| 2 cups | 240 g | 8.47 oz | 32 tbsp |
| 3 cups | 360 g | 12.70 oz | 48 tbsp |
How to Measure All-Purpose Flour Accurately
Spoon the flour from its bag into the cup with a scoop, then sweep the excess off with a knife. Never dip the cup into the bag: dipping compacts the flour and a "cup" can swing from 120 g to 150 g — enough to turn a tender crumb dry. If the flour has settled in storage, stir it once with a spoon before measuring.
Storing All-Purpose Flour & Common Substitutes
Storage
Keep in an airtight container in a cool, dark cupboard for 8–12 months. Flour absorbs kitchen humidity and nearby odors (onion, spices), so the sealed container is doing two jobs. For longer keeping, freeze it — a fully sealed bag keeps 2 years and needs no thawing before use.
Substitutions
Bread flour swaps 1:1 in most recipes — the crumb turns slightly chewier — and spelt flour works 1:1 with a shorter mix time. Going the other way, 1 cup of all-purpose equals 1 cup plus 2 tablespoons of cake flour. For a cake-flour stand-in, remove 2 tablespoons per cup and replace them with cornstarch.
Frequently Asked Questions
How many grams is 1 cup of all-purpose flour?
One US cup of all-purpose flour weighs approximately 120 grams (4.2 ounces) using the standard spoon-and-level measurement method.
How many tablespoons is 1 cup of all-purpose flour?
There are 16 level tablespoons in 1 US cup of all-purpose flour, with each tablespoon weighing approximately 7.5 grams.
How many cups is 100 grams of all-purpose flour?
100 grams of all-purpose flour is equal to approximately 0.83 US cups.
What is the correct way to measure all-purpose flour?
Spoon the flour from its bag into the cup with a scoop, then sweep the excess off with a knife. Never dip the cup into the bag: dipping compacts the flour and a "cup" can swing from 120 g to 150 g — enough to turn a tender crumb dry. If the flour has settled in storage, stir it once with a spoon before measuring.
What can I substitute for all-purpose flour?
Bread flour swaps 1:1 in most recipes — the crumb turns slightly chewier — and spelt flour works 1:1 with a shorter mix time. Going the other way, 1 cup of all-purpose equals 1 cup plus 2 tablespoons of cake flour. For a cake-flour stand-in, remove 2 tablespoons per cup and replace them with cornstarch.