Cooking & density

mL to Grams Converter

Millilitres to grams depends on what you're measuring. Pick a substance — grams = mL × density.

How to convert mL to grams

Millilitres measure volume and grams measure mass, so there is no single number that converts between them — it depends on how dense the ingredient is. The formula is simple: grams = millilitres × density, where density is measured in grams per millilitre (g/mL). Water is the easy case because its density is almost exactly 1.00 g/mL, so 250 mL of water weighs 250 g. Anything lighter than water (oil, flour) weighs less per millilitre; anything denser (honey, milk) weighs more.

Density reference table

This mL to grams converter uses the typical densities below. Real values vary slightly with temperature, brand and how tightly dry ingredients are packed, so treat these as good kitchen estimates rather than lab figures.

Substance	Density (g/mL)	100 mL weighs
Water	1.00	100 g
Milk	1.03	103 g
Cooking oil	0.92	92 g
Honey	1.42	142 g
Butter	0.911	91.1 g
Flour (all-purpose)	0.53	53 g
Sugar (granulated)	0.85	85 g

Why ingredient choice matters

Because density swings widely, using the wrong ingredient can throw a recipe off badly. The same 250 mL is 250 g of water but only 133 g of flour or as much as 355 g of honey. That is why baking recipes increasingly list grams: weighing removes the guesswork that comes from scooping and packing. Pick your ingredient above and the gram weight updates instantly as you type.

Density reference for more ingredients

The dropdown covers the seven substances people convert most, but plenty of "X mL to grams" searches are for other pantry items. Use these typical densities with the same grams = mL × density formula:

Ingredient	Density (g/mL)	100 mL weighs
Brown sugar (packed)	0.93	93 g
Maple syrup	1.37	137 g
Vegetable oil	0.92	92 g
Peanut butter	1.09	109 g
Yogurt	1.03	103 g

Worked example: 200 mL of honey

Honey is one of the densest kitchen ingredients at about 1.42 g/mL, so it weighs far more than its volume suggests. For 200 mL: 200 × 1.42 = 284 g. The same 200 mL of water would be 200 g, and of flour only about 106 g. That threefold spread is exactly why swapping an ingredient without re-checking its density can throw a recipe off — and why weighing beats measuring by volume when accuracy matters.

Converting grams back to millilitres

To go the other way, divide by the density instead of multiplying: mL = grams ÷ density. So 250 g of milk ÷ 1.03 ≈ 243 mL, and 100 g of oil ÷ 0.92 ≈ 109 mL. This is the case you hit when a recipe gives a weight but your measuring jug only shows volume — look up the ingredient's density and divide.

Cups, tablespoons and millilitres

Recipes often mix volume units, so it helps to anchor them to millilitres before converting to grams. A US cup is about 237 mL, a tablespoon is 15 mL and a teaspoon is 5 mL. So one cup of water (237 mL × 1.00) is roughly 237 g, while one cup of flour (237 mL × 0.53) is about 126 g. Convert the volume to millilitres first, then multiply by the ingredient's density — that two-step path turns any cup or spoon measure into a weight in grams.

Why wet and dry ingredients behave differently

Liquids like water, milk and oil have stable densities, so their mL-to-gram conversion barely changes from day to day. Dry and semi-solid ingredients are trickier: flour, sugar and cocoa can pack loosely or tightly, and a firmly packed cup can weigh noticeably more than a sifted one. That is why the density values here are typical estimates rather than fixed constants, and why serious bakers weigh dry ingredients directly instead of relying on volume at all. When precision matters — in bread, pastry or anything that depends on exact ratios — weighing the ingredient beats measuring it by volume every time.

Frequently asked questions

How many grams is 250 mL?

It depends on the substance. For water, 250 mL = 250 g (density 1.00 g/mL). For milk it is about 258 g, for cooking oil about 230 g, and for honey roughly 355 g.

Is 1 mL always equal to 1 gram?

Only for water, which has a density of about 1.00 g/mL. For other ingredients you must multiply by their density: grams = mL × density.

How do I convert grams back to mL?

Divide by the density instead of multiplying: millilitres = grams ÷ density. For example, 100 g of oil ÷ 0.92 ≈ 109 mL.

Are these densities exact?

They are typical kitchen values. Density shifts with temperature and, for dry goods like flour and sugar, with how tightly the ingredient is packed, so treat results as close estimates.

How many grams is 100 mL of oil?

About 92 grams. Cooking oil has a density near 0.92 g/mL, so 100 mL weighs 100 × 0.92 = 92 g.

Why do baking recipes prefer grams over millilitres?

Weighing removes the variation that comes from how loosely or tightly dry ingredients are scooped and packed, so grams give more consistent, repeatable results than volume measures like mL or cups.