Molasses, Cups to Grams & Grams to Cups
1 cup of molasses = 337 grams · 100g = 0.3 cups
Also known as black treacle.
Molasses is the dark, robust syrup left from refining sugar, and at about 337 grams per cup it is both heavy and intensely flavoured. It gives gingerbread, BBQ sauce and dark rye their deep colour and slight bitterness. Blackstrap molasses is the strongest and least sweet grade.
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Molasses cups to grams table
| Cups | Grams | Ounces | Tablespoons |
|---|---|---|---|
| 1/8 | 42.1 g | 1.49 oz | 2 |
| 1/4 | 84.2 g | 2.97 oz | 4 |
| 1/3 | 112 g | 3.96 oz | 5.33 |
| 1/2 | 168 g | 5.94 oz | 8 |
| 2/3 | 225 g | 7.93 oz | 10.7 |
| 3/4 | 253 g | 8.92 oz | 12 |
| 1 | 337 g | 11.9 oz | 16 |
| 1 1/2 | 506 g | 17.8 oz | 24 |
| 2 | 674 g | 23.8 oz | 32 |
| 3 | 1,011 g | 35.7 oz | 48 |
Molasses grams to cups table
Working the other way? Here's how many cups common gram weights of molasses come to, handy when a recipe lists molasses in grams but you only have cup measures.
| Grams | Cups | Ounces | Tablespoons |
|---|---|---|---|
| 25 g | 0.07 | 0.88 oz | 1.19 |
| 50 g | 0.15 | 1.76 oz | 2.37 |
| 75 g | 0.22 | 2.65 oz | 3.56 |
| 100 g | 0.3 | 3.53 oz | 4.75 |
| 125 g | 0.37 | 4.41 oz | 5.93 |
| 150 g | 0.45 | 5.29 oz | 7.12 |
| 175 g | 0.52 | 6.17 oz | 8.31 |
| 200 g | 0.59 | 7.05 oz | 9.5 |
| 225 g | 0.67 | 7.94 oz | 10.7 |
| 250 g | 0.74 | 8.82 oz | 11.9 |
| 300 g | 0.89 | 10.6 oz | 14.2 |
| 350 g | 1.04 | 12.3 oz | 16.6 |
| 400 g | 1.19 | 14.1 oz | 19 |
| 500 g | 1.48 | 17.6 oz | 23.7 |
Molasses: US, metric & UK cups compared
A “cup” isn’t the same size everywhere, so 1 cup of molasses weighs a different number of grams depending on which cup your recipe uses. The US cup is 236.6 ml, while Australia, New Zealand, Canada and modern UK recipes use a 250 ml metric cup. Here’s 1 cup of molasses in each:
| Cup standard | Size | 1 cup molasses | Used in |
|---|---|---|---|
| US cup | 237 ml | 337 g | United States (most US recipe sites) |
| Metric cup | 250 ml | 356 g | Australia, NZ, Canada & modern UK |
| UK imperial cup | 284 ml | 405 g | Older British recipes |
| Japanese cup | 200 ml | 285 g | Japan |
Unless a recipe says otherwise, US recipes mean the US cup and Australian/UK recipes mean the 250 ml metric cup. The tables higher up this page use the US cup.
Related ingredients
Quick reference: Molasses in grams
- ⅛ cup molasses = 42.1g
- ¼ cup molasses = 84.2g
- ⅓ cup molasses = 112g
- ½ cup molasses = 168g
- ⅔ cup molasses = 225g
- ¾ cup molasses = 253g
- 1 cup molasses = 337g
- 2 cups molasses = 674g
How many cups is 100g, 200g or 300g of molasses?
Because one cup of molasses weighs about 337 grams, you can convert any weight to cups by dividing by 337. So 100g of molasses is about 0.3 cups, 200g is about 0.59 cups, 250g is about 0.74 cups, and 300g is about 0.89 cups. For any other amount, type the grams straight into the converter above and switch it to show cups.
How to measure molasses accurately
For the most reliable baking results, weigh molasses (also called black treacle) on a kitchen scale rather than scooping by volume. One US cup of molasses weighs about 337 grams (11.9 oz), but the exact figure changes with how tightly it's packed and the brand. Scooping straight from the bag compacts molasses and can leave you 15 to 20% over, so spoon it into the cup and level it off for the closest match to the figures above. Use the tables for quick reference, or the converter for any custom amount in cups, grams, ounces or tablespoons.
Tip: Measure molasses in an oiled cup, and use blackstrap sparingly — its bitter edge can overpower a bake if swapped one-to-one for milder molasses.
Molasses conversions: common questions
How many grams are in a cup of molasses?
One US cup of molasses weighs approximately 337 grams (11.9 oz).
How many grams in half a cup of molasses?
Half a cup (½ cup) of molasses weighs approximately 168 grams.
How many grams in a quarter cup of molasses?
A quarter cup (¼ cup) of molasses weighs approximately 84.2 grams.
How do I convert molasses from cups to grams?
Multiply the number of cups by 337. For example, 2 cups of molasses = 674 grams, and ¾ cup = 253 grams.
How many cups is 100g of molasses?
100 grams of molasses is about 0.3 cups. 200g is about 0.59 cups and 300g is about 0.89 cups, since 1 cup weighs 337 grams.
How many grams in a metric (Australian) cup of molasses?
One 250 ml metric cup of molasses, used in Australia, New Zealand, Canada and modern UK recipes, weighs about 356 grams, compared with 337 grams for a 236.6 ml US cup.