Kitchen Density Converter
Rolled Oats: Cups to Grams Conversion
Exact weight conversions, volume-to-mass ratios, and baking guidelines for rolled oats.
One US customary cup of Rolled Oats weighs approximately 90 grams (or 3.2 oz) when using the professional spoon-and-level measurement method. One level tablespoon weighs 5.5 grams.
Convert Rolled Oats Volume to Weight
Rolled Oats 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) | 11.3 g | 0.40 oz | 2 tbsp |
| 1/4 cup (4 tbsp) | 22.5 g | 0.79 oz | 4 tbsp |
| 1/3 cup (5 tbsp + 1 tsp) | 30 g | 1.06 oz | 5.3 tbsp |
| 1/2 cup (8 tbsp) | 45 g | 1.59 oz | 8 tbsp |
| 2/3 cup | 60 g | 2.12 oz | 10.7 tbsp |
| 3/4 cup (12 tbsp) | 67.5 g | 2.38 oz | 12 tbsp |
| 1 cup (16 tbsp) | 90 g | 3.17 oz | 16 tbsp |
| 1 1/2 cups | 135 g | 4.76 oz | 24 tbsp |
| 2 cups | 180 g | 6.35 oz | 32 tbsp |
| 3 cups | 270 g | 9.52 oz | 48 tbsp |
How to Measure Rolled Oats Accurately
Scoop and level is accurate for rolled oats — they nest loosely but consistently, at 90 g per cup. What actually matters is not mixing up the cut: quick oats (finer) weigh about 20 g more per cup, and steel-cut oats weigh over 150 g. If a recipe just says "oats", it means these.
Storing Rolled Oats & Common Substitutes
Storage
Airtight, 12 months at room temperature. Oats contain enough oil to eventually go stale with a faint bitter smell — the fridge buys a few extra months. Keep them away from flour and bananas unless you want weevils and fruit flies as kitchen companions.
Substitutions
Quick oats substitute 1:1 by volume in baking (softer texture, faster liquid absorption); steel-cut do not — they are a different ingredient and need real cooking. For a gluten-free check, buy oats certified GF; cross-contamination at the mill is common.
Frequently Asked Questions
How many grams is 1 cup of rolled oats?
One US cup of rolled oats weighs approximately 90 grams (3.2 ounces) using the standard spoon-and-level measurement method.
How many tablespoons is 1 cup of rolled oats?
There are 16 level tablespoons in 1 US cup of rolled oats, with each tablespoon weighing approximately 5.5 grams.
How many cups is 100 grams of rolled oats?
100 grams of rolled oats is equal to approximately 1.11 US cups.
What is the correct way to measure rolled oats?
Scoop and level is accurate for rolled oats — they nest loosely but consistently, at 90 g per cup. What actually matters is not mixing up the cut: quick oats (finer) weigh about 20 g more per cup, and steel-cut oats weigh over 150 g. If a recipe just says "oats", it means these.
What can I substitute for rolled oats?
Quick oats substitute 1:1 by volume in baking (softer texture, faster liquid absorption); steel-cut do not — they are a different ingredient and need real cooking. For a gluten-free check, buy oats certified GF; cross-contamination at the mill is common.