To convert tablespoons of oat flour into grams, multiply by 5.75: one tablespoon comes to 5.75 grams. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
Water is the yardstick: 1 mL of it weighs 1 g. Oat flour comes in at 0.38886 g per mL, or 38.89% of water, which is why a cup of it is 92 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
A level tablespoon of oat flour is 5.75 g, which puts a teaspoon at 1.917 g and a tablespoon and a half — the quantity recipes are fondest of — at 8.625 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 1.09% of a cup of oat flour, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 5.435 cups, and a 1 kg pack 10.87.
What the number depends on: Ground rolled oats, and almost as light per cup as the flakes it came from.
The formula
tablespoons- The amount of oat flour you are converting, in tablespoons
5.75- Grams per tablespoon for oat flour, from its density of 0.38886 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in tablespoons.
- It is multiplied by 5.75, the grams-per-tablespoon figure for oat flour.
- 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 oat flour in grams
2 tbsp of oat flour weighs out at 11.5 grams. Divide 11.5 by 5.75 and you get back to 2 tbsp, which is the quickest check that the factor is the right way up.
4 tbsp of oat flour in grams
4 tbsp of oat flour weighs out at 23 grams. Divide 23 by 5.75 and you get back to 4 tbsp, which is the quickest check that the factor is the right way up.
12 tbsp of oat flour in grams
A recipe calling for 12 tbsp of oat flour needs 69 grams on the scale. The arithmetic is 12 × 5.75 = 69, and halving the recipe halves the weight to 34.5 grams.
How to read your score
Frequently asked questions
How many grams are in 1 tbsp of oat flour?
One tablespoon of oat flour is 5.75 grams. Half that quantity is 2.875 grams and double it is 11.5 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of oat flour not 236 g like water?
Because weight per cup depends on what is in the cup. Oat flour has a density of 0.38886 g per mL where water has 1.00, so a cup of it weighs 92 g rather than 236.6 g. That is a difference of 144.6 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 oat flour by roughly 20% — about 9.2 g either side of 92 g — because ground rolled oats, and almost as light per cup as the flakes it came from. Weighing removes the question entirely.
Is a fluid ounce of oat flour 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 oat flour weighs 0.4057 oz, so the two readings differ by 59.4%. 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 oat flour would weigh 97.215 g instead of 92 g — 5.22 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 oat flour is 5.75 g, and a scale reading to the nearest gram is working at 17.4% 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 tablespoons of oat flour is 500 g?
500 g of oat flour is 86.957 tablespoons — 0.173913 tablespoons to one gram, so 500 × 0.173913 = 86.957. Going that way is a division by 5.75, or a multiplication by 0.173913 if you prefer.
Oat flour in tablespoons and grams
| Tablespoons | Grams | Unrounded |
|---|---|---|
| 1/2 tbsp | 2.875 g | 2.875 |
| 1 tbsp | 5.75 g | 5.75 |
| 2 tbsp | 11.5 g | 11.5 |
| 3 tbsp | 17.25 g | 17.25 |
| 4 tbsp | 23 g | 23 |
| 6 tbsp | 34.5 g | 34.5 |
| 8 tbsp | 46 g | 46 |
| 12 tbsp | 69 g | 69 |
| 16 tbsp | 92 g | 92 |
Based on 92 g per cup of oat flour. One tablespoon of oat flour is 5.75 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 92 g | 3.25 oz | 236.6 mL |
| 1 tbsp | 5.75 g | 0.203 oz | 14.79 mL |
| 2 tsp | 3.833 g | 0.135 oz | 9.858 mL |
| 1 tsp | 1.917 g | 0.0676 oz | 4.929 mL |
| 3/4 tsp | 1.438 g | 0.0507 oz | 3.697 mL |
| 1/2 tsp | 0.9583 g | 0.0338 oz | 2.464 mL |
| 1/4 tsp | 0.4792 g | 0.0169 oz | 1.232 mL |
| 1/8 tsp | 0.2396 g | 0.00845 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 | 90 g | 3.175 oz | 0.3804 |
| Oat flour (this page) | 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.