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Molasses — Cups to Grams

One US cup of molasses weighs about 340 grams. That makes it heavier than all-purpose flour, which is 120 grams per cup. Molasses is thick and heavy — a lightly oiled cup helps every drop pour out. Use the converter below to switch molasses between cups, grams, ounces, tablespoons and millilitres — or read the full chart underneath.

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Molasses conversion chart

Molasses — cups to grams chart
Cups	Grams	Ounces	Tablespoons	Millilitres
⅛ cup	42.5 g	1.5 oz	2	29.57 ml
¼ cup	85 g	3 oz	4	59.15 ml
⅓ cup	113.3 g	4 oz	5.33	78.86 ml
½ cup	170 g	6 oz	8	118.3 ml
⅔ cup	226.7 g	8 oz	10.67	157.7 ml
¾ cup	255 g	8.99 oz	12	177.4 ml
1 cup	340 g	11.99 oz	16	236.6 ml
1¼ cups	425 g	14.99 oz	20	295.7 ml
1½ cups	510 g	17.99 oz	24	354.9 ml
2 cups	680 g	23.99 oz	32	473.2 ml
3 cups	1020 g	35.98 oz	48	709.8 ml

Grams to cups: molasses

Molasses — grams to cups chart
Grams	Cups	Ounces	Tablespoons
10 g	0.029	0.353 oz	0.471
25 g	0.074	0.882 oz	1.18
50 g	0.147	1.76 oz	2.35
75 g	0.221	2.65 oz	3.53
100 g	0.294	3.53 oz	4.71
125 g	0.368	4.41 oz	5.88
150 g	0.441	5.29 oz	7.06
200 g	0.588	7.05 oz	9.41
250 g	0.735	8.82 oz	11.76
300 g	0.882	10.58 oz	14.12
400 g	1.18	14.11 oz	18.82
500 g	1.47	17.64 oz	23.53

How to measure molasses

Molasses is thick and heavy — a lightly oiled cup helps every drop pour out.

Because a cup measures volume rather than weight, the most reliable way to measure molasses 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 molasses

1 cup molasses = 1 cup dark corn syrup, cane syrup, sorghum, or honey (King Arthur Baking)
Straight 1:1 swap. Color and flavor will be milder; blackstrap notes won't be replicated.
1 cup molasses = ¾ cup packed dark brown sugar + ¼ cup water (King Arthur Baking)
Use when you need the molasses flavor but only have brown sugar; brown sugar already contains molasses.

See all molasses substitutes, ratios and sources →

Molasses conversions: FAQ

Why doesn't a cup of molasses weigh the same as a cup of water?

A cup measures volume, not weight. Molasses is denser than water (340 g versus 237 g per cup), so the same volume has a different weight. Weighing in grams is the most accurate way to measure it.

Common molasses conversions

Quick-answer pages for the conversions people search for most.

100 g to cups

100 g molasses ≈ 0.294 cups

200 g to cups

200 g molasses ≈ 0.588 cups

250 g to cups

250 g molasses ≈ 0.735 cups

500 g to cups

500 g molasses ≈ 1.47 cups

¼ cup to grams

¼ cup molasses ≈ 85 g

½ cup to grams

½ cup molasses ≈ 170 g

1 cup to grams

1 cup molasses ≈ 340 g

2 cups to grams

2 cups molasses ≈ 680 g

Related converters

← All ingredient converters Cups to grams chart Recipe scaler

* 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.