Cups of dry couscous to grams runs on one number, 170 grams 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.
Water is the yardstick: 1 mL of it weighs 1 g. Dry couscous comes in at 0.71855 g per mL, or 71.85% of water, which is why a cup of it is 170 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
A cup of dry couscous is 170 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 153 g and 204 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 0.588% of a cup of dry couscous, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 2.941 cups, and a 1 kg pack 5.882.
The condition this weight assumes: Before steaming. It roughly triples in volume once hydrated, which is why the dry weight is the useful one.
The formula
cups- The amount of dry couscous you are converting, in cups
170- Grams per cup for dry couscous, from its density of 0.71855 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 170, the grams-per-cup figure for dry couscous.
- The result appears in grams, with a second reading in oz 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 dry couscous in grams
A recipe calling for 1/3 cup of dry couscous needs 56.6667 grams on the scale. The arithmetic is 0.333333 × 170 = 56.666667, and halving the recipe halves the weight to 28.3333 grams.
3/4 cup of dry couscous in grams
A recipe calling for 3/4 cup of dry couscous needs 127.5 grams on the scale. The arithmetic is 0.75 × 170 = 127.5, and halving the recipe halves the weight to 63.75 grams.
3 cup of dry couscous in grams
Take 3 cup of dry couscous: 3 × 170 gives 510 grams. Doubling the batch takes it to 1020 grams, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many grams are in 1 cup of dry couscous?
One cup of dry couscous is 170 grams. Half that quantity is 85 grams and double it is 340 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of dry couscous not 236 g like water?
Because weight per cup depends on what is in the cup. Dry couscous has a density of 0.71855 g per mL where water has 1.00, so a cup of it weighs 170 g rather than 236.6 g. That is a difference of 66.6 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 dry couscous by roughly 20% — about 17 g either side of 170 g — because before steaming. Weighing removes the question entirely.
Is a fluid ounce of dry couscous 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 dry couscous weighs 0.7496 oz, so the two readings differ by 25%. 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 dry couscous would weigh 179.64 g instead of 170 g — 9.64 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 dry couscous — roughly 34 g on a 170 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 dry couscous is 500 g?
500 g of dry couscous is 2.9412 cups — 0.00588235 cups to one gram, so 500 × 0.00588235 = 2.9412. Going that way is a division by 170, or a multiplication by 0.00588235 if you prefer.
Dry couscous in cups and grams
| Cups | Grams | Unrounded |
|---|---|---|
| 1/8 cup | 21.25 g | 21.25 |
| 1/4 cup | 42.5 g | 42.5 |
| 1/3 cup | 56.6667 g | 56.66666667 |
| 1/2 cup | 85 g | 85 |
| 2/3 cup | 113.333 g | 113.3333333 |
| 3/4 cup | 127.5 g | 127.5 |
| 1 cup | 170 g | 170 |
| 1 1/2 cup | 255 g | 255 |
| 2 cup | 340 g | 340 |
| 3 cup | 510 g | 510 |
| 4 cup | 680 g | 680 |
Based on 170 g per cup of dry couscous. One cup of dry couscous is 170 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 170 g | 6 oz | 236.6 mL |
| 3/4 cup | 127.5 g | 4.5 oz | 177.4 mL |
| 2/3 cup | 113.3 g | 4 oz | 157.7 mL |
| 1/2 cup | 85 g | 3 oz | 118.3 mL |
| 1/3 cup | 56.67 g | 2 oz | 78.86 mL |
| 1/4 cup | 42.5 g | 1.5 oz | 59.15 mL |
| 1 tbsp | 10.62 g | 0.375 oz | 14.79 mL |
| 1 tsp | 3.542 g | 0.125 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) |
|---|---|---|---|
| Steel-cut oats | 160 g | 5.644 oz | 0.6763 |
| Semolina | 167 g | 5.891 oz | 0.7059 |
| Uncooked quinoa | 170 g | 5.997 oz | 0.7185 |
| Dry couscous (this page) | 170 g | 5.997 oz | 0.7185 |
| Uncooked white rice | 185 g | 6.526 oz | 0.7819 |
| Uncooked brown rice | 190 g | 6.702 oz | 0.8031 |
| Dried lentils | 192 g | 6.773 oz | 0.8115 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.