How do you convert cups to grams for a liquid?

Multiply the volume in millilitres by the liquid's density. One US cup is 236.59 ml, so a cup of water weighs about 237 g, a cup of whole milk about 244 g, and a cup of honey about 339 g.

Is 1 ml always 1 gram?

Only for water. Oils are about 8 percent lighter (roughly 0.92 g per ml) and syrups are 35 to 45 percent heavier (1.36 to 1.43 g per ml).

Why does the tool have US, UK and metric tabs?

The cup, tablespoon, fluid ounce and pint are different sizes in each system. A UK pint is 568 ml and a US pint is 473 ml, so the same word gives a different weight.

Are these weights exact?

They are typical values based on food-composition data. Brand, temperature and fat content shift them by a few percent. For baking, weigh the ingredient on a scale.

Unit-To-Unit Fluid conversion

Liquid volume to weight

Pick a liquid, choose the unit you have, and choose the unit you want. The result updates as you type. Water is close to 1 g per ml, but oil is lighter and honey is much heavier, so the answer depends on the liquid.

Formula weight = volume in ml × density (g per ml)

Weight of 20 common liquids

Typical weights by US cup, tablespoon and 100 ml
Liquid	Per US cup	Per US tbsp	Per 100 ml	Ounces per cup
Extra virgin olive oil	216 g	13.5 g	91 g	7.6 oz
Vegetable oil	218 g	13.6 g	92 g	7.7 oz
Toasted sesame oil	218 g	13.6 g	92 g	7.7 oz
Coconut oil (melted)	218 g	13.6 g	92 g	7.7 oz
Whole milk	244 g	15.2 g	103 g	8.6 oz
Heavy cream	238 g	14.9 g	101 g	8.4 oz
Buttermilk	245 g	15.3 g	104 g	8.6 oz
Coconut milk (canned)	240 g	15.0 g	101 g	8.5 oz
Water	237 g	14.8 g	100 g	8.4 oz
Chicken stock	240 g	15.0 g	101 g	8.5 oz
Beef stock	240 g	15.0 g	101 g	8.5 oz
Vegetable stock	240 g	15.0 g	101 g	8.5 oz
Lemon juice	244 g	15.2 g	103 g	8.6 oz
Wine vinegar (white or red)	240 g	15.0 g	101 g	8.5 oz
Balsamic vinegar	256 g	16.0 g	108 g	9.0 oz
Dry white wine	230 g	14.4 g	97 g	8.1 oz
Soy sauce	256 g	16.0 g	108 g	9.0 oz
Fish sauce	288 g	18.0 g	122 g	10.2 oz
Honey	339 g	21.2 g	143 g	12.0 oz
Maple syrup	322 g	20.1 g	136 g	11.4 oz

These are typical values from food-composition data. Brand, temperature and fat content move them by a few percent, so treat them as close estimates.

Worked examples

Common conversions
Measure	Grams	Ounces
1 US cup of honey	339 g	12.0 oz
250 ml (one metric cup) of olive oil	228 g	8.1 oz
2 US tablespoons of soy sauce	32.0 g	1.1 oz
1 UK pint of whole milk	586 g	20.7 oz

Each one is the volume in millilitres times the density. For honey, 236.59 ml × 1.433 g per ml is 339 g. The UK pint is larger than the US pint, so the same word gives a heavier result.

Which tab to use

Use the US tab for recipes written in US cups, tablespoons and fluid ounces. Use UK for imperial pints and fluid ounces, which are about 20 percent and 4 percent larger than the US versions. Use Metric for millilitres, litres, 250 ml metric cups and 5 ml and 15 ml spoons, plus the 20 ml Australian tablespoon.

The swap button reverses the direction, so you can enter a weight and get the volume. That is handy when a scale reading has to become a measuring-cup amount.

Learn more

Frequently asked

How do you convert cups to grams for a liquid?: Multiply the volume in millilitres by the liquid's density. One US cup is 236.59 ml, so a cup of water weighs about 237 g, a cup of whole milk about 244 g, and a cup of honey about 339 g.
Is 1 ml always 1 gram?: Only for water. Oils are about 8 percent lighter (roughly 0.92 g per ml) and syrups are 35 to 45 percent heavier (1.36 to 1.43 g per ml).
Why does the tool have US, UK and metric tabs?: The cup, tablespoon, fluid ounce and pint are different sizes in each system. A UK pint is 568 ml and a US pint is 473 ml, so the same word gives a different weight.
Are these weights exact?: They are typical values based on food-composition data. Brand, temperature and fat content shift them by a few percent. For baking, weigh the ingredient on a scale.

Related conversions

US Cups to Millilitres Tablespoons to Millilitres US Fluid Ounces to Millilitres US Pints to Millilitres Ounces to Grams