Millilitres of molasses to grams runs on one number, 1.4244157 grams per millilitre. 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.
Put next to water — 1 g per mL exactly — molasses measures 1.4244 g per mL. That ratio, 142.4%, is what separates this page from every other ingredient in the same units, and it is measured rather than defined.
Molasses has a density of 1.4244 g per mL, so 100 mL of it weighs 142.4 g and 250 mL weighs 356.1 g. That single figure is what every other number on this page is built from — water is 1.00 g per mL, so this ingredient is 142.4% as heavy as the same volume of water.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.297% of a cup of molasses, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 1.484 cups, and a 1 kg pack 2.967.
The condition this weight assumes: What is left after sugar crystallises out, so almost all of its weight is dissolved solids.
The formula
millilitres- The amount of molasses you are converting, in millilitres
1.42441570632- Grams per millilitre for molasses, from its density of 1.4244 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in millilitres.
- It is multiplied by 1.42441570632, the grams-per-millilitre figure for molasses.
- 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
15 mL of molasses in grams
Take 15 mL of molasses: 15 × 1.4244157 gives 21.3662 grams. Doubling the batch takes it to 42.7325 grams, because the relationship is a straight proportion once the density is known.
100 mL of molasses in grams
100 mL of molasses weighs out at 142.442 grams. Divide 142.442 by 1.4244157 and you get back to 100 mL, which is the quickest check that the factor is the right way up.
250 mL of molasses in grams
250 mL of molasses weighs out at 356.104 grams. Divide 356.104 by 1.4244157 and you get back to 250 mL, which is the quickest check that the factor is the right way up.
How to read your score
Frequently asked questions
How many grams are in 1 mL of molasses?
One millilitre of molasses is 1.4244157 grams. Half that quantity is 0.712208 grams and double it is 2.84883 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of molasses not 236 g like water?
Because weight per cup depends on what is in the cup. Molasses has a density of 1.4244 g per mL where water has 1.00, so a cup of it weighs 337 g rather than 236.6 g. That is a difference of 100.4 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?
Barely. Molasses does not compress, so a cup of it is 337 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of molasses 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 molasses weighs 1.486 oz, so the two readings differ by 48.6%. 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 molasses would weigh 356.1 g instead of 337 g — 19.1 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?
At this size the spoon wins. One millilitre of molasses is 1.424 g, and a scale reading to the nearest gram is working at 70.2% resolution on that — a measuring spoon is the more accurate instrument below about 5 g, which is why spice quantities are still written in spoons.
How many millilitres of molasses is 500 g?
500 g of molasses is 351.02 millilitres — 0.702042 millilitres to one gram, so 500 × 0.702042 = 351.02. Going that way is a division by 1.42442, or a multiplication by 0.702042 if you prefer.
Molasses in millilitres and grams
| Millilitres | Grams | Unrounded |
|---|---|---|
| 5 mL | 7.12208 g | 7.122078532 |
| 10 mL | 14.2442 g | 14.24415706 |
| 15 mL | 21.3662 g | 21.36623559 |
| 30 mL | 42.7325 g | 42.73247119 |
| 50 mL | 71.2208 g | 71.22078532 |
| 100 mL | 142.442 g | 142.4415706 |
| 125 mL | 178.052 g | 178.0519633 |
| 150 mL | 213.662 g | 213.6623559 |
| 200 mL | 284.883 g | 284.8831413 |
| 250 mL | 356.104 g | 356.1039266 |
| 500 mL | 712.208 g | 712.2078532 |
Based on 337 g per cup of molasses. One millilitre of molasses is 1.4244157 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 337 g | 11.9 oz | 236.6 mL |
| 3/4 cup | 252.8 g | 8.92 oz | 177.4 mL |
| 2/3 cup | 224.7 g | 7.92 oz | 157.7 mL |
| 1/2 cup | 168.5 g | 5.94 oz | 118.3 mL |
| 1/3 cup | 112.3 g | 3.96 oz | 78.86 mL |
| 1/4 cup | 84.25 g | 2.97 oz | 59.15 mL |
| 1 tbsp | 21.06 g | 0.743 oz | 14.79 mL |
| 1 tsp | 7.021 g | 0.248 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) |
|---|---|---|---|
| Peanut butter | 258 g | 9.101 oz | 1.091 |
| Sweetened condensed milk | 306 g | 10.79 oz | 1.293 |
| Maple syrup | 322 g | 11.36 oz | 1.361 |
| Corn syrup | 328 g | 11.57 oz | 1.386 |
| Agave nectar | 331 g | 11.68 oz | 1.399 |
| Molasses (this page) | 337 g | 11.89 oz | 1.424 |
| Honey | 340 g | 11.99 oz | 1.437 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.