All-purpose flour: cups to grams
One US cup of flour weighs about 120 grams. Type an amount and pick the cup you are using; the answer updates as you type.
All-purpose flour cups to grams converter
All-purpose flour: 1 US cup ≈ 120 g · source: King Arthur Baking
Cup sizes: US customary cup 236.588 mL (default) · metric cup 250 mL (Australia, Canada, New Zealand) · UK imperial cup 284.13 mL. Pick the cup in the unit list. Weights vary with how the cup is filled.
How it’s calculated
1 US cup of flour ≈ 120 g · 1 tbsp ≈ 7.5 g · 1 metric cup (250 mL) ≈ 126.8 g · 1 UK cup (284 mL) ≈ 144.11 g
grams = US cups × 120
Step by step
- Multiply by the weight of one cup: 1 × 120 g = 120 g.
Spoon the flour into the cup and level it with a knife. Scooping straight from the bag packs it down, so the cup holds noticeably more flour than the recipe expects. Weighing is more accurate than cups; weights vary with how the cup is packed.
All-purpose flour cups to grams table
| US cups | Grams | Ounces |
|---|---|---|
| ⅛ cup | 15 g | 0.52911 oz |
| ¼ cup | 30 g | 1.0582 oz |
| ⅓ cup | 40 g | 1.411 oz |
| ½ cup | 60 g | 2.1164 oz |
| ⅔ cup | 80 g | 2.8219 oz |
| ¾ cup | 90 g | 3.1747 oz |
| 1 cup | 120 g | 4.2329 oz |
| 1½ cups | 180 g | 6.3493 oz |
| 2 cups | 240 g | 8.4658 oz |
| 3 cups | 360 g | 12.699 oz |
| 4 cups | 480 g | 16.932 oz |
FAQ
Spoon the flour into the cup and level it with a knife. Scooping straight from the bag packs it down, so the cup holds noticeably more flour than the recipe expects.
How many grams are in 1 cup of flour?
1 US cup (236.6 mL) of flour weighs about 120 g, according to King Arthur Baking, Ingredient Weight Chart. A 250 mL metric cup holds about 127 g.
How many cups is 100 g of flour?
100 g of flour is about 0.83 US cups, or 13.3 tablespoons.
Why do cup-to-gram conversions for flour vary?
A cup measures volume, not weight. How you fill the cup, humidity and the brand change the weight. Spoon the flour into the cup and level it with a knife. Scooping straight from the bag packs it down, so the cup holds noticeably more flour than the recipe expects.
Is a US cup the same as a UK or metric cup?
No. A US customary cup is 236.6 mL, the metric cup used in Australia, Canada and New Zealand is 250 mL, and the old British imperial cup is 284 mL. Modern UK recipes usually give grams instead.
Sources
- King Arthur Baking, Ingredient Weight Chart: All-Purpose Flour: 1 cup = 4 1/4 oz = 120 g.
- NIST Handbook 44, Appendix C: 1 US cup = 8 US fl oz = 236.5882365 mL; 1 tbsp = 3 tsp.
Checked by Unitglide on 2026-10-27.