One tablespoon of steel-cut oats is 10 grams, so converting tablespoons of steel-cut oats to grams means multiplying by 10. That factor is specific to this ingredient — it comes from its density, not from any relationship between the two units.
The density behind that figure is 0.67628 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of steel-cut oats weighs 160 g, so this ingredient is 67.63% as heavy as the same volume of water — the single fact the whole page rests on.
A level tablespoon of steel-cut oats is 10 g, which puts a teaspoon at 3.333 g and a tablespoon and a half — the quantity recipes are fondest of — at 15 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 0.625% of a cup of steel-cut oats, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 3.125 cups, and a 1 kg pack 6.25.
What the number depends on: Cut rather than rolled, so the pieces are dense and pack far tighter than flakes of the same grain.
The formula
tablespoons- The amount of steel-cut oats you are converting, in tablespoons
10- Grams per tablespoon for steel-cut oats, from its density of 0.67628 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in tablespoons.
- It is multiplied by 10, the grams-per-tablespoon figure for steel-cut oats.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
2 tbsp of steel-cut oats in grams
2 tbsp of steel-cut oats weighs out at 20 grams. Divide 20 by 10 and you get back to 2 tbsp, which is the quickest check that the factor is the right way up.
4 tbsp of steel-cut oats in grams
A recipe calling for 4 tbsp of steel-cut oats needs 40 grams on the scale. The arithmetic is 4 × 10 = 40, and halving the recipe halves the weight to 20 grams.
12 tbsp of steel-cut oats in grams
A recipe calling for 12 tbsp of steel-cut oats needs 120 grams on the scale. The arithmetic is 12 × 10 = 120, and halving the recipe halves the weight to 60 grams.
How to read your score
Frequently asked questions
How many grams are in 1 tbsp of steel-cut oats?
One tablespoon of steel-cut oats is 10 grams. Half that quantity is 5 grams and double it is 20 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of steel-cut oats not 236 g like water?
Because weight per cup depends on what is in the cup. Steel-cut oats has a density of 0.67628 g per mL where water has 1.00, so a cup of it weighs 160 g rather than 236.6 g. That is a difference of 76.6 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 steel-cut oats by roughly 20% — about 16 g either side of 160 g — because cut rather than rolled, so the pieces are dense and pack far tighter than flakes of the same grain. Weighing removes the question entirely.
Is a fluid ounce of steel-cut 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 steel-cut oats weighs 0.7055 oz, so the two readings differ by 29.5%. 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 steel-cut oats would weigh 169.07 g instead of 160 g — 9.07 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?
A scale, if the result matters. Volume measuring carries a spread of about 20% for steel-cut oats — roughly 32 g on a 160 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How many tablespoons of steel-cut oats is 500 g?
500 g of steel-cut oats is 50 tablespoons — 0.1 tablespoons to one gram, so 500 × 0.1 = 50. Going that way is a division by 10, or a multiplication by 0.1 if you prefer.
Steel-cut oats in tablespoons and grams
| Tablespoons | Grams | Unrounded |
|---|---|---|
| 1/2 tbsp | 5 g | 5 |
| 1 tbsp | 10 g | 10 |
| 2 tbsp | 20 g | 20 |
| 3 tbsp | 30 g | 30 |
| 4 tbsp | 40 g | 40 |
| 6 tbsp | 60 g | 60 |
| 8 tbsp | 80 g | 80 |
| 12 tbsp | 120 g | 120 |
| 16 tbsp | 160 g | 160 |
Based on 160 g per cup of steel-cut oats. One tablespoon of steel-cut oats is 10 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 160 g | 5.64 oz | 236.6 mL |
| 1 tbsp | 10 g | 0.353 oz | 14.79 mL |
| 2 tsp | 6.667 g | 0.235 oz | 9.858 mL |
| 1 tsp | 3.333 g | 0.118 oz | 4.929 mL |
| 3/4 tsp | 2.5 g | 0.0882 oz | 3.697 mL |
| 1/2 tsp | 1.667 g | 0.0588 oz | 2.464 mL |
| 1/4 tsp | 0.8333 g | 0.0294 oz | 1.232 mL |
| 1/8 tsp | 0.4167 g | 0.0147 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) |
|---|---|---|---|
| Graham cracker crumbs | 142 g | 5.009 oz | 0.6002 |
| Rice flour | 158 g | 5.573 oz | 0.6678 |
| Potato starch | 160 g | 5.644 oz | 0.6763 |
| Steel-cut oats (this page) | 160 g | 5.644 oz | 0.6763 |
| Semolina | 167 g | 5.891 oz | 0.7059 |
| Uncooked quinoa | 170 g | 5.997 oz | 0.7185 |
| Dry couscous | 170 g | 5.997 oz | 0.7185 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.