To convert teaspoons of oat flour into grams, multiply by 1.9166667: one teaspoon comes to 1.9166667 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 0.38886 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of oat flour weighs 92 g, so this ingredient is 38.89% as heavy as the same volume of water — the single fact the whole page rests on.
A level teaspoon of oat flour weighs 1.917 g. A kitchen scale that reads to the nearest gram is therefore working at roughly 52.2% resolution on a single spoonful, which is why measuring spoons beat scales below about 5 g and lose to them above it. Three teaspoons make a tablespoon, so the same spoonful is 5.75 g if the recipe scales up.
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
teaspoons- The amount of oat flour you are converting, in teaspoons
1.91666666667- Grams per teaspoon 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 teaspoons.
- It is multiplied by 1.91666666667, the grams-per-teaspoon 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
3/4 tsp of oat flour in grams
Take 3/4 tsp of oat flour: 0.75 × 1.9166667 gives 1.4375 grams. Doubling the batch takes it to 2.875 grams, because the relationship is a straight proportion once the density is known.
1 1/2 tsp of oat flour in grams
A recipe calling for 1 1/2 tsp of oat flour needs 2.875 grams on the scale. The arithmetic is 1.5 × 1.9166667 = 2.875, and halving the recipe halves the weight to 1.4375 grams.
4 tsp of oat flour in grams
4 tsp of oat flour weighs out at 7.66667 grams. Divide 7.66667 by 1.9166667 and you get back to 4 tsp, 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 tsp of oat flour?
One teaspoon of oat flour is 1.9166667 grams. Half that quantity is 0.958333 grams and double it is 3.83333 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 teaspoon of oat flour is 1.917 g, and a scale reading to the nearest gram is working at 52.2% 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 teaspoons of oat flour is 500 g?
500 g of oat flour is 260.87 teaspoons — 0.521739 teaspoons to one gram, so 500 × 0.521739 = 260.87. Going that way is a division by 1.91667, or a multiplication by 0.521739 if you prefer.
Oat flour in teaspoons and grams
| Teaspoons | Grams | Unrounded |
|---|---|---|
| 1/4 tsp | 0.479167 g | 0.4791666667 |
| 1/2 tsp | 0.958333 g | 0.9583333333 |
| 3/4 tsp | 1.4375 g | 1.4375 |
| 1 tsp | 1.91667 g | 1.916666667 |
| 1 1/2 tsp | 2.875 g | 2.875 |
| 2 tsp | 3.83333 g | 3.833333333 |
| 3 tsp | 5.75 g | 5.75 |
| 4 tsp | 7.66667 g | 7.666666667 |
| 6 tsp | 11.5 g | 11.5 |
Based on 92 g per cup of oat flour. One teaspoon of oat flour is 1.9166667 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.