Rolled oats: cups to grams
One US cup of rolled oats weighs about 89 grams. Type an amount and pick the cup you are using; the answer updates as you type.
Rolled oats cups to grams converter
Rolled oats: 1 US cup ≈ 89 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 rolled oats ≈ 89 g · 1 tbsp ≈ 5.5625 g · 1 metric cup (250 mL) ≈ 94.045 g · 1 UK cup (284 mL) ≈ 106.88 g
grams = US cups × 89
Step by step
- Multiply by the weight of one cup: 1 × 89 g = 89 g.
This is old-fashioned (rolled) or quick oats, which are light and airy. Steel-cut oats are much denser, so use a separate figure for them. Weighing is more accurate than cups; weights vary with how the cup is packed.
Rolled oats cups to grams table
| US cups | Grams | Ounces |
|---|---|---|
| ⅛ cup | 11.125 g | 0.39242 oz |
| ¼ cup | 22.25 g | 0.78485 oz |
| ⅓ cup | 29.667 g | 1.0465 oz |
| ½ cup | 44.5 g | 1.5697 oz |
| ⅔ cup | 59.333 g | 2.0929 oz |
| ¾ cup | 66.75 g | 2.3545 oz |
| 1 cup | 89 g | 3.1394 oz |
| 1½ cups | 133.5 g | 4.7091 oz |
| 2 cups | 178 g | 6.2788 oz |
| 3 cups | 267 g | 9.4181 oz |
| 4 cups | 356 g | 12.558 oz |
FAQ
This is old-fashioned (rolled) or quick oats, which are light and airy. Steel-cut oats are much denser, so use a separate figure for them.
How many grams are in 1 cup of rolled oats?
1 US cup (236.6 mL) of rolled oats weighs about 89 g, according to King Arthur Baking, Ingredient Weight Chart. A 250 mL metric cup holds about 94 g.
How many cups is 100 g of rolled oats?
100 g of rolled oats is about 1.12 US cups, or 18.0 tablespoons.
Why do cup-to-gram conversions for rolled oats vary?
A cup measures volume, not weight. How you fill the cup, humidity and the brand change the weight. This is old-fashioned (rolled) or quick oats, which are light and airy. Steel-cut oats are much denser, so use a separate figure for them.
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: Oats (old-fashioned or quick-cooking): 1 cup = 3 1/8 oz = 89 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.