Cups of uncooked brown rice to ounces runs on one number, 6.7020528 ounces per cup. It is a measured property of this ingredient rather than a defined conversion, which is why a generic volume-to-weight tool cannot give you it.
Put next to water — 1 g per mL exactly — uncooked brown rice measures 0.80308 g per mL. That ratio, 80.31%, is what separates this page from every other ingredient in the same units, and it is measured rather than defined.
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
cups- The amount of uncooked brown rice you are converting, in cups
6.70205277042- Ounces per cup for uncooked brown rice, from its density of 0.80308 g/mL
ounces- The equivalent quantity in ounces
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 6.70205277042, the ounces-per-cup figure for uncooked brown rice.
- The result appears in ounces, with a second reading in g beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/3 cup of uncooked brown rice in ounces
Take 1/3 cup of uncooked brown rice: 0.333333 × 6.7020528 gives 2.23402 ounces. Doubling the batch takes it to 4.46804 ounces, because the relationship is a straight proportion once the density is known.
3/4 cup of uncooked brown rice in ounces
3/4 cup of uncooked brown rice weighs out at 5.02654 ounces. Divide 5.02654 by 6.7020528 and you get back to 3/4 cup, which is the quickest check that the factor is the right way up.
3 cup of uncooked brown rice in ounces
A recipe calling for 3 cup of uncooked brown rice needs 20.1062 ounces on the scale. The arithmetic is 3 × 6.7020528 = 20.106158, and halving the recipe halves the weight to 10.0531 ounces.
How to read your score
Frequently asked questions
How many ounces are in 1 cup of uncooked brown rice?
One cup of uncooked brown rice is 6.7020528 ounces. Half that quantity is 3.35103 ounces and double it is 13.4041 ounces, 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 many cups of uncooked brown rice is 16 oz?
16 oz of uncooked brown rice is 2.3873 cups — 0.149208 cups to one ounce, so 16 × 0.149208 = 2.3873. Going that way is a division by 6.70205, or a multiplication by 0.149208 if you prefer.
Uncooked brown rice in cups and ounces
| Cups | Ounces | Unrounded |
|---|---|---|
| 1/8 cup | 0.837757 oz | 0.8377565963 |
| 1/4 cup | 1.67551 oz | 1.675513193 |
| 1/3 cup | 2.23402 oz | 2.23401759 |
| 1/2 cup | 3.35103 oz | 3.351026385 |
| 2/3 cup | 4.46804 oz | 4.46803518 |
| 3/4 cup | 5.02654 oz | 5.026539578 |
| 1 cup | 6.70205 oz | 6.70205277 |
| 1 1/2 cup | 10.0531 oz | 10.05307916 |
| 2 cup | 13.4041 oz | 13.40410554 |
| 3 cup | 20.1062 oz | 20.10615831 |
| 4 cup | 26.8082 oz | 26.80821108 |
Based on 190 g per cup of uncooked brown rice. One cup of uncooked brown rice is 6.7020528 ounces.
| 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.