To convert cups of whole wheat flour into ounces, multiply by 4.2328754: one cup comes to 4.2328754 ounces. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
Put next to water — 1 g per mL exactly — whole wheat flour measures 0.50721 g per mL. That ratio, 50.72%, is what separates this page from every other ingredient in the same units, and it is measured rather than defined.
A cup of whole wheat flour is 120 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 108 g and 144 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 whole wheat flour is 4.233 oz. US kitchen scales usually step in eighths of an ounce, which is 3.54 g — around 2.95% 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 and germ are bulkier than the endosperm they replace, so a cup weighs less than white flour despite feeling coarser.
The formula
cups- The amount of whole wheat flour you are converting, in cups
4.23287543395- Ounces per cup for whole wheat flour, from its density of 0.50721 g/mL
ounces- The equivalent quantity in ounces
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 4.23287543395, the ounces-per-cup figure for whole wheat flour.
- 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 whole wheat flour in ounces
Take 1/3 cup of whole wheat flour: 0.333333 × 4.2328754 gives 1.41096 ounces. Doubling the batch takes it to 2.82192 ounces, because the relationship is a straight proportion once the density is known.
3/4 cup of whole wheat flour in ounces
Take 3/4 cup of whole wheat flour: 0.75 × 4.2328754 gives 3.17466 ounces. Doubling the batch takes it to 6.34931 ounces, because the relationship is a straight proportion once the density is known.
3 cup of whole wheat flour in ounces
Take 3 cup of whole wheat flour: 3 × 4.2328754 gives 12.6986 ounces. Doubling the batch takes it to 25.3973 ounces, because the relationship is a straight proportion once the density is known.
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Frequently asked questions
How many ounces are in 1 cup of whole wheat flour?
One cup of whole wheat flour is 4.2328754 ounces. Half that quantity is 2.11644 ounces and double it is 8.46575 ounces, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of whole wheat flour not 236 g like water?
Because weight per cup depends on what is in the cup. Whole wheat flour has a density of 0.50721 g per mL where water has 1.00, so a cup of it weighs 120 g rather than 236.6 g. That is a difference of 116.6 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 whole wheat flour by roughly 20% — about 12 g either side of 120 g — because the bran and germ are bulkier than the endosperm they replace, so a cup weighs less than white flour despite feeling coarser. Weighing removes the question entirely.
Is a fluid ounce of whole wheat 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 whole wheat flour weighs 0.5291 oz, so the two readings differ by 47.1%. 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 whole wheat flour would weigh 126.8 g instead of 120 g — 6.8 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 whole wheat flour — roughly 24 g on a 120 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 whole wheat flour is 16 oz?
16 oz of whole wheat flour is 3.7799 cups — 0.236246 cups to one ounce, so 16 × 0.236246 = 3.7799. Going that way is a division by 4.23288, or a multiplication by 0.236246 if you prefer.
Whole wheat flour in cups and ounces
| Cups | Ounces | Unrounded |
|---|---|---|
| 1/8 cup | 0.529109 oz | 0.5291094292 |
| 1/4 cup | 1.05822 oz | 1.058218858 |
| 1/3 cup | 1.41096 oz | 1.410958478 |
| 1/2 cup | 2.11644 oz | 2.116437717 |
| 2/3 cup | 2.82192 oz | 2.821916956 |
| 3/4 cup | 3.17466 oz | 3.174656575 |
| 1 cup | 4.23288 oz | 4.232875434 |
| 1 1/2 cup | 6.34931 oz | 6.349313151 |
| 2 cup | 8.46575 oz | 8.465750868 |
| 3 cup | 12.6986 oz | 12.6986263 |
| 4 cup | 16.9315 oz | 16.93150174 |
Based on 120 g per cup of whole wheat flour. One cup of whole wheat flour is 4.2328754 ounces.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 120 g | 4.23 oz | 236.6 mL |
| 3/4 cup | 90 g | 3.17 oz | 177.4 mL |
| 2/3 cup | 80 g | 2.82 oz | 157.7 mL |
| 1/2 cup | 60 g | 2.12 oz | 118.3 mL |
| 1/3 cup | 40 g | 1.41 oz | 78.86 mL |
| 1/4 cup | 30 g | 1.06 oz | 59.15 mL |
| 1 tbsp | 7.5 g | 0.265 oz | 14.79 mL |
| 1 tsp | 2.5 g | 0.0882 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) |
|---|---|---|---|
| Dry breadcrumbs | 108 g | 3.81 oz | 0.4565 |
| Coconut flour | 112 g | 3.951 oz | 0.4734 |
| Cake flour | 114 g | 4.021 oz | 0.4818 |
| Whole wheat flour (this page) | 120 g | 4.233 oz | 0.5072 |
| Tapioca starch | 120 g | 4.233 oz | 0.5072 |
| Powdered sugar | 120 g | 4.233 oz | 0.5072 |
| All-purpose flour | 125 g | 4.409 oz | 0.5283 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.