To convert millilitres of steel-cut oats into grams, multiply by 0.67628045: one millilitre comes to 0.67628045 grams. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
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.
Steel-cut oats has a density of 0.67628 g per mL, so 100 mL of it weighs 67.63 g and 250 mL weighs 169.1 g. That single figure is what every other number on this page is built from — water is 1.00 g per mL, so this ingredient is 67.63% as heavy as the same volume of water.
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.
The condition this weight assumes: Cut rather than rolled, so the pieces are dense and pack far tighter than flakes of the same grain.
The formula
millilitres- The amount of steel-cut oats you are converting, in millilitres
0.676280454037- Grams per millilitre 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 millilitres.
- It is multiplied by 0.676280454037, the grams-per-millilitre 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
15 mL of steel-cut oats in grams
15 mL of steel-cut oats weighs out at 10.1442 grams. Divide 10.1442 by 0.67628045 and you get back to 15 mL, which is the quickest check that the factor is the right way up.
100 mL of steel-cut oats in grams
A recipe calling for 100 mL of steel-cut oats needs 67.628 grams on the scale. The arithmetic is 100 × 0.67628045 = 67.628045, and halving the recipe halves the weight to 33.814 grams.
250 mL of steel-cut oats in grams
250 mL of steel-cut oats weighs out at 169.07 grams. Divide 169.07 by 0.67628045 and you get back to 250 mL, which is the quickest check that the factor is the right way up.
How to read your score
Frequently asked questions
How many grams are in 1 mL of steel-cut oats?
One millilitre of steel-cut oats is 0.67628045 grams. Half that quantity is 0.33814 grams and double it is 1.35256 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?
At this size the spoon wins. One millilitre of steel-cut oats is 0.6763 g, and a scale reading to the nearest gram is working at 148% 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 many millilitres of steel-cut oats is 500 g?
500 g of steel-cut oats is 739.34 millilitres — 1.47868 millilitres to one gram, so 500 × 1.47868 = 739.34. Going that way is a division by 0.67628, or a multiplication by 1.47868 if you prefer.
Steel-cut oats in millilitres and grams
| Millilitres | Grams | Unrounded |
|---|---|---|
| 5 mL | 3.3814 g | 3.38140227 |
| 10 mL | 6.7628 g | 6.76280454 |
| 15 mL | 10.1442 g | 10.14420681 |
| 30 mL | 20.2884 g | 20.28841362 |
| 50 mL | 33.814 g | 33.8140227 |
| 100 mL | 67.628 g | 67.6280454 |
| 125 mL | 84.5351 g | 84.53505675 |
| 150 mL | 101.442 g | 101.4420681 |
| 200 mL | 135.256 g | 135.2560908 |
| 250 mL | 169.07 g | 169.0701135 |
| 500 mL | 338.14 g | 338.140227 |
Based on 160 g per cup of steel-cut oats. One millilitre of steel-cut oats is 0.67628045 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 160 g | 5.64 oz | 236.6 mL |
| 3/4 cup | 120 g | 4.23 oz | 177.4 mL |
| 2/3 cup | 106.7 g | 3.76 oz | 157.7 mL |
| 1/2 cup | 80 g | 2.82 oz | 118.3 mL |
| 1/3 cup | 53.33 g | 1.88 oz | 78.86 mL |
| 1/4 cup | 40 g | 1.41 oz | 59.15 mL |
| 1 tbsp | 10 g | 0.353 oz | 14.79 mL |
| 1 tsp | 3.333 g | 0.118 oz | 4.929 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.