Liters to kg Calculator
Convert liters (volume) to kilograms (mass) using substance density. The formula is kg = liters x density. For water, 1 liter equals approximately 1 kilogram, but other liquids have different densities.
How to Convert Liters to Kilograms
- Identify the substance and its density in kg/L (same as g/mL).
- Multiply the volume in liters by the density.
- The result is the mass in kilograms.
Formula
kg = Liters x Density (kg/L)
Example Calculation
Convert 5 liters of gasoline to kg:
Density of gasoline = 0.75 kg/L
Mass = 5 L x 0.75 kg/L = 3.75 kg
Liters to kg Reference Table
| Substance | Density (kg/L) | 1L = kg | 5L = kg |
|---|---|---|---|
| Water | 1 | 1.00 | 5.00 |
| Milk (whole) | 1.03 | 1.03 | 5.15 |
| Olive Oil | 0.92 | 0.92 | 4.60 |
| Vegetable Oil | 0.91 | 0.91 | 4.55 |
| Honey | 1.42 | 1.42 | 7.10 |
| Gasoline | 0.75 | 0.75 | 3.75 |
| Diesel | 0.85 | 0.85 | 4.25 |
| Ethanol | 0.789 | 0.79 | 3.95 |
| Seawater | 1.025 | 1.02 | 5.13 |
Frequently Asked Questions
How many kg is 1 liter of water?
1 liter of water weighs approximately 1 kilogram (exactly 1 kg at 4 degrees Celsius, the temperature of maximum density).
Is 1 liter always 1 kg?
No, only for water. 1 liter of oil weighs about 0.92 kg, while 1 liter of honey weighs about 1.42 kg. The weight depends on the substance density.
How much does 1 liter of milk weigh?
Whole milk has a density of about 1.03 kg/L, so 1 liter of milk weighs approximately 1.03 kg (slightly heavier than water due to dissolved solids).
How do I convert liters of fuel to kg?
Gasoline: multiply liters by 0.75. Diesel: multiply liters by 0.85. For example, 50 liters of diesel = 50 x 0.85 = 42.5 kg.
Why is density expressed as kg/L?
kg/L is numerically equal to g/mL and g/cm3. It is convenient because multiplying liters by kg/L directly gives kilograms without additional unit conversions.