To convert ounces of uncooked brown rice into cups, multiply by 0.14920802: one ounce comes to 0.14920802 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 0.80308 g per mL, against 1.00 for water. A cup of water weighs 236.6 g and a cup of uncooked brown rice weighs 190 g, so this ingredient is 80.31% as heavy as the same volume of water — the single fact the whole page rests on.
A cup of uncooked brown rice is 190 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 171 g and 228 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.
One cup of uncooked brown rice is 6.702 oz. US kitchen scales usually step in eighths of an ounce, which is 3.54 g — around 1.87% of a cup of this ingredient, so the scale is precise enough for a full cup and coarse for a spoonful. That is why recipes mix the two systems: ounces for the bulk, spoons for the small amounts.
How the figure is arrived at: The bran layer left on the grain makes it slightly heavier per cup than white rice of the same variety.
The formula
ounces- The amount of uncooked brown rice you are converting, in ounces
0.149208016447- Cups per ounce for uncooked brown rice, from its density of 0.80308 g/mL
cups- The equivalent quantity in cups
How it works, step by step
- Enter the quantity in ounces.
- It is multiplied by 0.149208016447, the cups-per-ounce figure for uncooked brown rice.
- 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
2 oz of uncooked brown rice in cups
A recipe calling for 2 oz of uncooked brown rice needs 0.298416 cups on the scale. The arithmetic is 2 × 0.14920802 = 0.29841603, and halving the recipe halves the weight to 0.149208 cups.
4 oz of uncooked brown rice in cups
4 oz of uncooked brown rice weighs out at 0.596832 cups. Divide 0.596832 by 0.14920802 and you get back to 4 oz, which is the quickest check that the factor is the right way up.
12 oz of uncooked brown rice in cups
12 oz of uncooked brown rice weighs out at 1.7905 cups. Divide 1.7905 by 0.14920802 and you get back to 12 oz, 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 oz of uncooked brown rice?
One ounce of uncooked brown rice is 0.14920802 cups. Half that quantity is 0.074604 cups and double it is 0.298416 cups, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of uncooked brown rice not 236 g like water?
Because weight per cup depends on what is in the cup. Uncooked brown rice has a density of 0.80308 g per mL where water has 1.00, so a cup of it weighs 190 g rather than 236.6 g. That is a difference of 46.6 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 uncooked brown rice by roughly 20% — about 19 g either side of 190 g — because the bran layer left on the grain makes it slightly heavier per cup than white rice of the same variety. Weighing removes the question entirely.
Is a fluid ounce of uncooked brown rice 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 uncooked brown rice weighs 0.8378 oz, so the two readings differ by 16.2%. 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 uncooked brown rice would weigh 200.77 g instead of 190 g — 10.8 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 uncooked brown rice — roughly 38 g on a 190 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 uncooked brown rice weigh?
2 cup of uncooked brown rice comes to 380 g, or 13.404 ounces. This page runs that calculation in reverse — enter a weight and it returns the volume — and the cups-to-ounces page does it in the direction the question is usually asked.
Uncooked brown rice in ounces and cups
| Ounces | Cups | Unrounded |
|---|---|---|
| 1/2 oz | 0.074604 cup | 0.07460400822 |
| 1 oz | 0.149208 cup | 0.1492080164 |
| 2 oz | 0.298416 cup | 0.2984160329 |
| 3 oz | 0.447624 cup | 0.4476240493 |
| 4 oz | 0.596832 cup | 0.5968320658 |
| 6 oz | 0.895248 cup | 0.8952480987 |
| 8 oz | 1.19366 cup | 1.193664132 |
| 12 oz | 1.7905 cup | 1.790496197 |
| 16 oz | 2.38733 cup | 2.387328263 |
Based on 190 g per cup of uncooked brown rice. One ounce of uncooked brown rice is 0.14920802 cups.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 190 g | 6.7 oz | 236.6 mL |
| 3/4 cup | 142.5 g | 5.03 oz | 177.4 mL |
| 2/3 cup | 126.7 g | 4.47 oz | 157.7 mL |
| 1/2 cup | 95 g | 3.35 oz | 118.3 mL |
| 1/3 cup | 63.33 g | 2.23 oz | 78.86 mL |
| 1/4 cup | 47.5 g | 1.68 oz | 59.15 mL |
| 1 tbsp | 11.88 g | 0.419 oz | 14.79 mL |
| 1 tsp | 3.958 g | 0.14 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) |
|---|---|---|---|
| Uncooked quinoa | 170 g | 5.997 oz | 0.7185 |
| Dry couscous | 170 g | 5.997 oz | 0.7185 |
| Uncooked white rice | 185 g | 6.526 oz | 0.7819 |
| Uncooked brown rice (this page) | 190 g | 6.702 oz | 0.8031 |
| Dried lentils | 192 g | 6.773 oz | 0.8115 |
| Granulated sugar | 200 g | 7.055 oz | 0.8454 |
| Arborio rice | 200 g | 7.055 oz | 0.8454 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.