How many kilograms are in 4 liters?
How many kilograms are in 4 liters?
Answer
The question does not name a substance, and there is no single number for it: a liter fixes the volume, the weight comes from the density. For instance, 4 liters of water is 3.99 kg, while 4 liters of gasoline is 2.96 kg. The table below covers every substance.
Why a liter has no single weight
A liter measures volume, a kilogram measures mass, and density is what ties them together: how many kilograms one liter of this particular substance comes to. The coincidence that makes people treat them as one thing is historical — in 1795 the gram was defined as the mass of one cubic centimeter of water, so a liter of water weighed a kilogram by construction. For anything else the equality breaks.
The extremes of this page make it obvious: one liter of LPG weighs 0.51 kg, while one liter of densely packed sand weighs 2 kg — four times more at the very same volume.
The other way round: how much room a kilogram takes
This page starts from a volume and answers in kilograms. The opposite question — how many liters a given mass comes to — is what the kilograms to liters calculator is for. Both read the same density table, so the two pages agree wherever the answer is volume times density.
Related Calculations
See Also
- Kilograms to Liters - How many liters are in a kilogram of water, honey, gasoline, sand and other substances — by density
- L to Ml - Convert Liters to Milliliters
- Sand Calculator - Cubic yards, tons and coverage for any area
- Topsoil Calculator - Cubic yards, weight and coverage for any area

How much 4 liters of each substance weighs
| Substance | Mass | Density, kg/L |
|---|---|---|
| Beer | 4.04 kg | 1.01 |
| Cement | 5–5.6 kg | 1.25–1.4 |
| Coal | 2.62–5.06 kg | 0.654–1.266 |
| Cucumbers | 2.48–2.56 kg | 0.62–0.64 |
| Diesel | 3.34 kg | 0.834 |
| Gasoline | 2.96 kg | 0.74 |
| Honey | 5.68 kg | 1.42 |
| Juice | 4.24 kg | 1.06 |
| LPG | 2.04 kg | 0.51 |
| Milk | 4.12 kg | 1.03 |
| Mineral spirits | 3.12 kg | 0.78 |
| Motor oil | 3.4 kg | 0.85 |
| Sand | 6.6–8 kg | 1.65–2 |
| Soil | 5.2–6 kg | 1.3–1.5 |
| Sugar | 2.88–3.6 kg | 0.72–0.9 |
| Tomatoes | 2.2–2.4 kg | 0.55–0.6 |
| Vegetable oil | 3.68 kg | 0.92 |
| Wall primer | 4 kg | 1 |
| Water | 3.99 kg | 0.998 |