Free Litres to Kilograms Calculator - Convert Volume to Mass
Convert litres of any liquid directly into kilograms, plus pounds, metric tons, and US short tons using density.
Formula & Methodology
Multiplying litres by density gives mass in kilograms directly, the cleanest volume-to-weight conversion in the metric system.
- Kilograms = Litres × Density (kg/L)
- Metric Tons = Kilograms ÷ 1,000
Worked Example
Using the Litres to Kilograms Calculator: apply the formula above to your input values. For instance, Kilograms = Litres × Density (kg/L), then Metric Tons = Kilograms ÷ 1,000. The tool performs each step instantly and shows the result.
Frequently Asked Questions
How many kilograms is one litre?
One litre of water is exactly 1 kilogram by definition. Other liquids differ: a litre of diesel is about 0.85 kg, and a litre of molasses about 1.4 kg.
How do I convert litres to kilograms?
Multiply the number of litres by the liquid density in kilograms per litre. The result is the mass in kilograms.
Why is water 1 kg per litre?
The kilogram was originally defined so that one litre of pure water at 4°C weighs one kilogram, which is why water has a density of 1.000 kg/L.
What if my liquid is not listed?
Select "Custom Density" and enter your own value in kg/L, kg/m³, or lb/ft³; the tool converts it automatically.
Does temperature change litres-to-kg results?
Yes, slightly. Warmer liquids are less dense, so a litre weighs a little less. Use a temperature-adjusted density for exact work.
Can I get tons from this too?
Yes. The calculator also shows metric tons (kg ÷ 1,000) and US short tons alongside kilograms and pounds.