Use this simple millilitres to grams calculator to convert a liquid or ingredient volume into weight. This is especially useful for cooking, baking, meal prep, and science work where grams provide better precision than volume measurements.
How to convert millilitres (mL) to grams (g)
Converting from millilitres to grams is straightforward once you know the density of the ingredient.
For water, density is about 1 g/mL, so 100 mL of water weighs 100 g. But for ingredients like flour, oil, or honey, density is different, which means the same volume can have a very different weight.
Why mL and grams are not always equal
Millilitres measure volume, while grams measure mass. Two ingredients can occupy the same space but have different mass because they are packed differently at the molecular level.
- 100 mL water ≈ 100 g
- 100 mL olive oil ≈ 91 g
- 100 mL honey ≈ 142 g
That is why density is essential for accurate conversion.
Common mL to grams reference values
| Ingredient | Density (g/mL) | 100 mL in grams |
|---|---|---|
| Water | 1.00 | 100 g |
| Milk | 1.03 | 103 g |
| Olive oil | 0.91 | 91 g |
| All-purpose flour | 0.53 | 53 g |
| Granulated sugar | 0.85 | 85 g |
| Honey | 1.42 | 142 g |
| Melted butter | 0.96 | 96 g |
Step-by-step example
Example: Convert 250 mL of milk to grams
Milk density is approximately 1.03 g/mL.
grams = 250 × 1.03 = 257.5 g
So, 250 mL of milk weighs around 257.5 grams.
Tips for accurate kitchen conversions
- Use a digital scale whenever precision matters (especially for baking).
- Check whether your ingredient is packed, sifted, melted, or room temperature, as density can shift slightly.
- For best consistency, stick to one system in a recipe (preferably grams).
- If your ingredient is not listed, use the custom density option in the calculator.
Frequently asked questions
Is 1 mL always equal to 1 gram?
No. It is only true for water at standard conditions. Other ingredients have different densities.
Can I use this for dry ingredients?
Yes, if you have a reliable density value in g/mL. Dry ingredients can vary based on packing, moisture, and particle size.
Can temperature affect results?
Yes. Density can change slightly with temperature. For everyday cooking, this difference is small, but in lab or industrial work it may matter.
Bottom line
This millilitres to grams calculator gives a fast and practical way to convert volume to mass using density. Whether you are preparing recipes, portioning ingredients, or doing science homework, it helps you move from guesswork to precise measurements in seconds.