How it's calculated
mL = kg × 1000 ÷ ρ
kg = mass in kilograms, mL = volume in millilitres, ρ = density in g/mL (water ≈ 1). Reverse: kg = mL × ρ ÷ 1000.
Worked examples
| Substance | mL per kg | Note |
|---|---|---|
| Water | 1000 | Baseline |
| Gasoline | 1337 | Less dense |
| Honey | 704 | More dense |
| Milk | 971 | Slightly dense |
Common questions
Why does 1 kg of honey take less volume than water?
Honey is denser, so a kilogram of it packs into about 704 mL rather than the 1,000 mL a kilogram of water fills.
At what temperature are these densities measured?
The densities are reported at 20 °C, a standard reference point from NIST and USDA data.