Sugars & Syrups
Convert ounces of molasses to cups
One ounce of molasses weighs about 0.086 cup, and half a ounce comes to roughly 0.043 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of molasses =
0.086 cup
About 1/8 cup in recipe notation
- ml
- 20.4
- tbsp
- 1.38
Molasses: 328 g per US cup · USDA FoodData Central. Blackstrap molasses is slightly denser than light molasses. Warm the jar for a cleaner pour.
Full molasses chart →Molasses at a glance
Every number on this page comes from a single figure: 328 grams per US cup (USDA FoodData Central).
- 1 cup
- 328 g
- 1 tablespoon
- 20.5 g
- 1 teaspoon
- 6.83 g
- 1 cup in ounces
- 11.6 oz
- 100 g in cups
- 0.305 cups
- Density
- 1.39 g/ml
ounces to cups chart for molasses
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Ounces (weight) | Cups (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.5 oz | 0.043 cup | 0.691 tbsp | 10.2 ml |
| 1 oz | 0.086 cup | 1.38 tbsp | 20.4 ml |
| 2 oz | 0.173 cup | 2.77 tbsp | 40.9 ml |
| 3 oz | 0.259 cup | 4.15 tbsp | 61.3 ml |
| 4 oz | 0.346 cup | 5.53 tbsp | 81.8 ml |
| 5 oz | 0.432 cup | 6.91 tbsp | 102 ml |
| 6 oz | 0.519 cup | 8.3 tbsp | 123 ml |
| 8 oz | 0.691 cup | 11.1 tbsp | 164 ml |
| 12 oz | 1.04 cup | 16.6 tbsp | 245 ml |
| 16 oz | 1.38 cup | 22.1 tbsp | 327 ml |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat molasses as 328 g per US customary cup, which works out to 1.386 g/ml. From there:
- Your ounces figure is converted into millilitres or grams using standard unit sizes (oz = 28.3 g).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 1/3 cups.
Measuring molasses accurately
Blackstrap molasses is slightly denser than light molasses. Warm the jar for a cleaner pour.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many cups are in 1 ounce of molasses?
1 ounce of molasses is 0.086 cup. This is based on a density of 328 g per US cup.
How many cups are in 2 ounces of molasses?
2 ounces of molasses is 0.173 cup, and 0.043 cup for half a ounce.
How much is 100 g of molasses in cups?
100 g of molasses is about 1/3 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for molasses?
Blackstrap molasses is slightly denser than light molasses. Warm the jar for a cleaner pour.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.