One cup of rice flour is 0.34833037 pounds, so converting cups of rice flour to pounds means multiplying by 0.34833037. That factor is specific to this ingredient — it comes from its density, not from any relationship between the two units.
Water is the yardstick: 1 mL of it weighs 1 g. Rice flour comes in at 0.66783 g per mL, or 66.78% of water, which is why a cup of it is 158 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
A cup of rice flour is 158 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 142.2 g and 189.6 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.
Pounds are how rice flour is bought rather than cooked, so this is the bag-size arithmetic: one pound is 2.871 cups, a 2 lb pack is 5.742 cups and a 5 lb sack is 14.35. That last figure is the one worth knowing before a large bake — it tells you whether one bag covers the recipe.
How the figure is arrived at: Fine, dense and gluten-free. Common in gluten-free blends and in tempura and rice-noodle batters.
The formula
cups- The amount of rice flour you are converting, in cups
0.348330374252- Pounds per cup for rice flour, from its density of 0.66783 g/mL
pounds- The equivalent quantity in pounds
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 0.348330374252, the pounds-per-cup figure for rice flour.
- The result appears in pounds, 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 rice flour in pounds
A recipe calling for 1/3 cup of rice flour needs 0.11611 pounds on the scale. The arithmetic is 0.333333 × 0.34833037 = 0.11611012, and halving the recipe halves the weight to 0.0580551 pounds.
3/4 cup of rice flour in pounds
3/4 cup of rice flour weighs out at 0.261248 pounds. Divide 0.261248 by 0.34833037 and you get back to 3/4 cup, which is the quickest check that the factor is the right way up.
3 cup of rice flour in pounds
Take 3 cup of rice flour: 3 × 0.34833037 gives 1.04499 pounds. Doubling the batch takes it to 2.08998 pounds, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many pounds are in 1 cup of rice flour?
One cup of rice flour is 0.34833037 pounds. Half that quantity is 0.174165 pounds and double it is 0.696661 pounds, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of rice flour not 236 g like water?
Because weight per cup depends on what is in the cup. Rice flour has a density of 0.66783 g per mL where water has 1.00, so a cup of it weighs 158 g rather than 236.6 g. That is a difference of 78.6 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 rice flour by roughly 20% — about 15.8 g either side of 158 g — because fine, dense and gluten-free. Weighing removes the question entirely.
Is a fluid ounce of rice 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 rice flour weighs 0.6967 oz, so the two readings differ by 30.3%. 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 rice flour would weigh 166.96 g instead of 158 g — 8.96 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 rice flour — roughly 31.6 g on a 158 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 rice flour is 1 lb?
1 lb of rice flour is 2.8708 cups — 2.87084 cups to one pound, so 1 × 2.87084 = 2.8708. Going that way is a division by 0.34833, or a multiplication by 2.87084 if you prefer.
Rice flour in cups and pounds
| Cups | Pounds | Unrounded |
|---|---|---|
| 1/8 cup | 0.0435413 lb | 0.04354129678 |
| 1/4 cup | 0.0870826 lb | 0.08708259356 |
| 1/3 cup | 0.11611 lb | 0.1161101248 |
| 1/2 cup | 0.174165 lb | 0.1741651871 |
| 2/3 cup | 0.23222 lb | 0.2322202495 |
| 3/4 cup | 0.261248 lb | 0.2612477807 |
| 1 cup | 0.34833 lb | 0.3483303743 |
| 1 1/2 cup | 0.522496 lb | 0.5224955614 |
| 2 cup | 0.696661 lb | 0.6966607485 |
| 3 cup | 1.04499 lb | 1.044991123 |
| 4 cup | 1.39332 lb | 1.393321497 |
Based on 158 g per cup of rice flour. One cup of rice flour is 0.34833037 pounds.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 158 g | 5.57 oz | 236.6 mL |
| 3/4 cup | 118.5 g | 4.18 oz | 177.4 mL |
| 2/3 cup | 105.3 g | 3.72 oz | 157.7 mL |
| 1/2 cup | 79 g | 2.79 oz | 118.3 mL |
| 1/3 cup | 52.67 g | 1.86 oz | 78.86 mL |
| 1/4 cup | 39.5 g | 1.39 oz | 59.15 mL |
| 1 tbsp | 9.875 g | 0.348 oz | 14.79 mL |
| 1 tsp | 3.292 g | 0.116 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) |
|---|---|---|---|
| Cornstarch | 128 g | 4.515 oz | 0.541 |
| Cornmeal | 138 g | 4.868 oz | 0.5833 |
| Graham cracker crumbs | 142 g | 5.009 oz | 0.6002 |
| Rice flour (this page) | 158 g | 5.573 oz | 0.6678 |
| Potato starch | 160 g | 5.644 oz | 0.6763 |
| Steel-cut oats | 160 g | 5.644 oz | 0.6763 |
| Semolina | 167 g | 5.891 oz | 0.7059 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.