Cups to Grams: Rolled oats (old-fashioned)

One US cup of rolled oats weighs 89 grams. Every other measure is below, in both directions.

1 cup of rolled oats

89 g

≈ 3.14 oz

Data & method: Density from the King Arthur Baking ingredient weight chart. Every number is checked by an automated test against its source. How we calculate →

Rolled oats (old-fashioned) — cups to grams chart

Rolled oats (old-fashioned)	Grams	Ounces
¼ cup	22 g	0.78 oz
⅓ cup	30 g	1.05 oz
½ cup	45 g	1.57 oz
⅔ cup	59 g	2.09 oz
¾ cup	67 g	2.35 oz
1 cup	89 g	3.14 oz
1½ cups	134 g	4.71 oz
2 cups	178 g	6.28 oz
3 cups	267 g	9.42 oz
1 tablespoon	5.6 g	0.2 oz
1 teaspoon	1.9 g	0.07 oz

Grams to cups: rolled oats

Working the other way — a recipe in grams, and cups are what you have in the drawer:

Grams of rolled oats	Cups (approx.)
50 g	0.56 cups
100 g	1⅛ cups
125 g	1⅜ cups
200 g	2¼ cups
250 g	2⅚ cups
500 g	5⅝ cups

Convert any amount

Preset to rolled oats — change the amount, units or ingredient to convert anything else.

Amount From To Ingredient

Result

89 g

Rolled oats (old-fashioned): 89 g per cup

Other flours & dry bases

See the full CrumbCalc ingredient weight chart →

Frequently Asked Questions

How many grams is 1 cup of rolled oats?

One US cup of rolled oats weighs 89 grams (about 3.14 ounces). This follows the King Arthur Baking ingredient weight chart, the reference most US test kitchens use.

How many grams is a tablespoon of rolled oats?

A tablespoon of rolled oats is about 5.6 grams, since one cup holds 16 tablespoons. A teaspoon is about 1.9 grams.

How many cups is 250 g of rolled oats?

250 grams of rolled oats is about 2⅚ cups (250 ÷ 89). Weighing is more reliable than measuring by cup, because how you fill the cup changes the amount.