Unsweetened baking chocolate — Cups to Grams
One US cup of unsweetened baking chocolate weighs about 170 grams. That makes it heavier than all-purpose flour, which is 120 grams per cup. Sold in 1-oz (28 g) squares or 4-oz (113 g) bars. Recipes usually call for it by weight or by square; chopped fine it packs about 170 g per cup, like chips. Use the converter below to switch unsweetened baking chocolate between cups, grams, ounces, tablespoons and millilitres — or read the full chart underneath.
Unsweetened baking chocolate conversion chart
| Cups | Grams | Ounces | Tablespoons | Millilitres |
|---|---|---|---|---|
| ⅛ cup | 21.25 g | 0.75 oz | 2 | 29.57 ml |
| ¼ cup | 42.5 g | 1.5 oz | 4 | 59.15 ml |
| ⅓ cup | 56.67 g | 2 oz | 5.33 | 78.86 ml |
| ½ cup | 85 g | 3 oz | 8 | 118.3 ml |
| ⅔ cup | 113.3 g | 4 oz | 10.67 | 157.7 ml |
| ¾ cup | 127.5 g | 4.5 oz | 12 | 177.4 ml |
| 1 cup | 170 g | 6 oz | 16 | 236.6 ml |
| 1¼ cups | 212.5 g | 7.5 oz | 20 | 295.7 ml |
| 1½ cups | 255 g | 8.99 oz | 24 | 354.9 ml |
| 2 cups | 340 g | 11.99 oz | 32 | 473.2 ml |
| 3 cups | 510 g | 17.99 oz | 48 | 709.8 ml |
Grams to cups: unsweetened baking chocolate
| Grams | Cups | Ounces | Tablespoons |
|---|---|---|---|
| 10 g | 0.059 | 0.353 oz | 0.941 |
| 25 g | 0.147 | 0.882 oz | 2.35 |
| 50 g | 0.294 | 1.76 oz | 4.71 |
| 75 g | 0.441 | 2.65 oz | 7.06 |
| 100 g | 0.588 | 3.53 oz | 9.41 |
| 125 g | 0.735 | 4.41 oz | 11.76 |
| 150 g | 0.882 | 5.29 oz | 14.12 |
| 200 g | 1.18 | 7.05 oz | 18.82 |
| 250 g | 1.47 | 8.82 oz | 23.53 |
| 300 g | 1.76 | 10.58 oz | 28.24 |
| 400 g | 2.35 | 14.11 oz | 37.65 |
| 500 g | 2.94 | 17.64 oz | 47.06 |
How to measure unsweetened baking chocolate
Sold in 1-oz (28 g) squares or 4-oz (113 g) bars. Recipes usually call for it by weight or by square; chopped fine it packs about 170 g per cup, like chips.
Because a cup measures volume rather than weight, the most reliable way to measure unsweetened baking chocolate is with a digital kitchen scale. If you are working from cups, keep your technique consistent every time so your results are repeatable. For more, see our guide on baking by weight versus volume.
No scale yet? You don't need a fancy one; any digital kitchen scale that reads in 1-gram steps does everything on this site. Well-rated kitchen scales on Amazon →
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Substitutes for unsweetened baking chocolate
- 1 oz unsweetened baking chocolate = 3 tbsp cocoa powder + 1 tbsp butter (King Arthur Baking)The classic baker's substitution. Use unsalted butter; sift the cocoa to avoid lumps, then stir it into the melted butter. Works wherever the chocolate is being melted into a batter — brownies, cakes, ganaches, frostings.
- 1 oz unsweetened baking chocolate = 3 tbsp cocoa powder + 1 tbsp vegetable oil (America's Test Kitchen)Dairy-free version of the same swap. Any neutral oil works (canola, sunflower, light olive); the texture is slightly different from the butter version but holds up well in most baked goods.
See all unsweetened baking chocolate substitutes, ratios and sources →
Compare unsweetened baking chocolate
Unsweetened baking chocolate conversions: FAQ
Why doesn't a cup of unsweetened baking chocolate weigh the same as a cup of water?
Common unsweetened baking chocolate conversions
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* Conversion figures are typical average weights for one US customary cup (236.6 ml), based on the King Arthur Baking Ingredient Weight Chart and cross-referenced with the U.S. Department of Agriculture FoodData Central database. Actual weight varies with packing, brand and humidity — see our methodology.