Grams of rolled oats to tablespoons runs on one number, 0.17777778 tablespoons per gram. It is a measured property of this ingredient rather than a defined conversion, which is why a generic volume-to-weight tool cannot give you it.
The density behind that figure is 0.38041 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of rolled oats weighs 90 g, so this ingredient is 38.04% as heavy as the same volume of water — the single fact the whole page rests on.
A level tablespoon of rolled oats is 5.625 g, which puts a teaspoon at 1.875 g and a tablespoon and a half — the quantity recipes are fondest of — at 8.438 g. Levelling twice is where the error comes from, so the scale is the faster instrument once the quantity passes a couple of spoons.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 1.11% of a cup of rolled oats, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 5.556 cups, and a 1 kg pack 11.11.
What the number depends on: Old-fashioned flakes. Very light for their volume because of the air trapped between them.
The formula
grams- The amount of rolled oats you are converting, in grams
0.177777777778- Tablespoons per gram for rolled oats, from its density of 0.38041 g/mL
tablespoons- The equivalent quantity in tablespoons
How it works, step by step
- Enter the quantity in grams.
- It is multiplied by 0.177777777778, the tablespoons-per-gram figure for rolled oats.
- The result appears in tablespoons, with a second reading in tsp beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
50 g of rolled oats in tablespoons
50 g of rolled oats weighs out at 8.88889 tablespoons. Divide 8.88889 by 0.17777778 and you get back to 50 g, which is the quickest check that the factor is the right way up.
150 g of rolled oats in tablespoons
Take 150 g of rolled oats: 150 × 0.17777778 gives 26.6667 tablespoons. Doubling the batch takes it to 53.3333 tablespoons, because the relationship is a straight proportion once the density is known.
500 g of rolled oats in tablespoons
500 g of rolled oats weighs out at 88.8889 tablespoons. Divide 88.8889 by 0.17777778 and you get back to 500 g, which is the quickest check that the factor is the right way up.
How to read your score
Frequently asked questions
How many tablespoons are in 1 g of rolled oats?
One gram of rolled oats is 0.17777778 tablespoons. Half that quantity is 0.0888889 tablespoons and double it is 0.355556 tablespoons, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of rolled oats not 236 g like water?
Because weight per cup depends on what is in the cup. Rolled oats has a density of 0.38041 g per mL where water has 1.00, so a cup of it weighs 90 g rather than 236.6 g. That is a difference of 146.6 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Yes, and by more than most people expect. Handling changes the weight of a cup of rolled oats by roughly 20% — about 9 g either side of 90 g — because old-fashioned flakes. Weighing removes the question entirely.
Is a fluid ounce of rolled oats the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of rolled oats weighs 0.3968 oz, so the two readings differ by 60.3%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of rolled oats would weigh 95.102 g instead of 90 g — 5.1 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
At this size the spoon wins. One tablespoon of rolled oats is 5.625 g, and a scale reading to the nearest gram is working at 17.8% resolution on that — a measuring spoon is the more accurate instrument below about 5 g, which is why spice quantities are still written in spoons.
How much does 3 tbsp of rolled oats weigh?
3 tbsp of rolled oats comes to 16.875 g, or 16.875 grams. This page runs that calculation in reverse — enter a weight and it returns the volume — and the tablespoons-to-grams page does it in the direction the question is usually asked.
Rolled oats in grams and tablespoons
| Grams | Tablespoons | Unrounded |
|---|---|---|
| 5 g | 0.888889 tbsp | 0.8888888889 |
| 10 g | 1.77778 tbsp | 1.777777778 |
| 25 g | 4.44444 tbsp | 4.444444444 |
| 50 g | 8.88889 tbsp | 8.888888889 |
| 100 g | 17.7778 tbsp | 17.77777778 |
| 125 g | 22.2222 tbsp | 22.22222222 |
| 150 g | 26.6667 tbsp | 26.66666667 |
| 200 g | 35.5556 tbsp | 35.55555556 |
| 250 g | 44.4444 tbsp | 44.44444444 |
| 300 g | 53.3333 tbsp | 53.33333333 |
| 500 g | 88.8889 tbsp | 88.88888889 |
| 1000 g | 177.778 tbsp | 177.7777778 |
Based on 90 g per cup of rolled oats. One gram of rolled oats is 0.17777778 tablespoons.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 90 g | 3.17 oz | 236.6 mL |
| 1 tbsp | 5.625 g | 0.198 oz | 14.79 mL |
| 2 tsp | 3.75 g | 0.132 oz | 9.858 mL |
| 1 tsp | 1.875 g | 0.0661 oz | 4.929 mL |
| 3/4 tsp | 1.406 g | 0.0496 oz | 3.697 mL |
| 1/2 tsp | 0.9375 g | 0.0331 oz | 2.464 mL |
| 1/4 tsp | 0.4688 g | 0.0165 oz | 1.232 mL |
| 1/8 tsp | 0.2344 g | 0.00827 oz | 0.6161 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Panko breadcrumbs | 60 g | 2.116 oz | 0.2536 |
| Cocoa powder | 85 g | 2.998 oz | 0.3593 |
| Rolled oats (this page) | 90 g | 3.175 oz | 0.3804 |
| Oat flour | 92 g | 3.245 oz | 0.3889 |
| Almond flour | 96 g | 3.386 oz | 0.4058 |
| Rye flour | 102 g | 3.598 oz | 0.4311 |
| Dry breadcrumbs | 108 g | 3.81 oz | 0.4565 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.