To convert grams of oat flour into cups, multiply by 0.010869565: one gram comes to 0.010869565 cups. 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 cup of oat flour is 92 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 82.8 g and 110.4 g covers the range from lightly spooned to firmly packed. That 20% spread is larger than most of the adjustments recipes fuss over, and it disappears entirely the moment the ingredient is weighed instead.
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
grams- The amount of oat flour you are converting, in grams
0.0108695652174- Cups per gram for oat flour, from its density of 0.38886 g/mL
cups- The equivalent quantity in cups
How it works, step by step
- Enter the quantity in grams.
- It is multiplied by 0.0108695652174, the cups-per-gram figure for oat flour.
- The result appears in cups, with a second reading in tbsp 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 oat flour in cups
Take 50 g of oat flour: 50 × 0.010869565 gives 0.543478 cups. Doubling the batch takes it to 1.08696 cups, because the relationship is a straight proportion once the density is known.
150 g of oat flour in cups
A recipe calling for 150 g of oat flour needs 1.63043 cups on the scale. The arithmetic is 150 × 0.010869565 = 1.6304348, and halving the recipe halves the weight to 0.815217 cups.
500 g of oat flour in cups
500 g of oat flour weighs out at 5.43478 cups. Divide 5.43478 by 0.010869565 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 cups are in 1 g of oat flour?
One gram of oat flour is 0.010869565 cups. Half that quantity is 0.00543478 cups and double it is 0.0217391 cups, 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?
A scale, if the result matters. Volume measuring carries a spread of about 20% for oat flour — roughly 18.4 g on a 92 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 much does 2 cup of oat flour weigh?
2 cup of oat flour comes to 184 g, or 184 grams. This page runs that calculation in reverse — enter a weight and it returns the volume — and the cups-to-grams page does it in the direction the question is usually asked.
Oat flour in grams and cups
| Grams | Cups | Unrounded |
|---|---|---|
| 5 g | 0.0543478 cup | 0.05434782609 |
| 10 g | 0.108696 cup | 0.1086956522 |
| 25 g | 0.271739 cup | 0.2717391304 |
| 50 g | 0.543478 cup | 0.5434782609 |
| 100 g | 1.08696 cup | 1.086956522 |
| 125 g | 1.3587 cup | 1.358695652 |
| 150 g | 1.63043 cup | 1.630434783 |
| 200 g | 2.17391 cup | 2.173913043 |
| 250 g | 2.71739 cup | 2.717391304 |
| 300 g | 3.26087 cup | 3.260869565 |
| 500 g | 5.43478 cup | 5.434782609 |
| 1000 g | 10.8696 cup | 10.86956522 |
Based on 92 g per cup of oat flour. One gram of oat flour is 0.010869565 cups.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 92 g | 3.25 oz | 236.6 mL |
| 3/4 cup | 69 g | 2.43 oz | 177.4 mL |
| 2/3 cup | 61.33 g | 2.16 oz | 157.7 mL |
| 1/2 cup | 46 g | 1.62 oz | 118.3 mL |
| 1/3 cup | 30.67 g | 1.08 oz | 78.86 mL |
| 1/4 cup | 23 g | 0.811 oz | 59.15 mL |
| 1 tbsp | 5.75 g | 0.203 oz | 14.79 mL |
| 1 tsp | 1.917 g | 0.0676 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) |
|---|---|---|---|
| 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.