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.
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.
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