Liters to KG Converter (Liquids & Fuels)
1 L of water is about 0.998 kg, of diesel about 0.83 kg — with the density and its source.
Type in either box: litres give kilograms, kilograms give litres.
0 to 40 °C.
The mix varies by supplier and season; ask yours.
Leave empty to use the typical density shown below.
- Density used
- 0.9982 kg/L (998.2 kg/m³)
- Range
- 0.9922–1 kg/L
Pure water at 20 °C (CIPM formula).
Where the density comes from
The density of a real liquid depends on its make-up and its temperature. If you know yours (from a label, a delivery note or a hydrometer), enter it for an exact answer.
Water: litres to kilograms
| Volume | Mass |
|---|---|
| 1 L | 0.9982 kg |
| 2 L | 1.996 kg |
| 5 L | 4.991 kg |
| 10 L | 9.982 kg |
| 15 L | 14.973 kg |
| 20 L | 19.964 kg |
| 50 L | 49.91 kg |
| 100 L | 99.821 kg |
| 200 L | 199.64 kg |
| 500 L | 499.1 kg |
| 1,000 L | 998.21 kg |
About the Liters to KG Converter (Liquids & Fuels)
Convert a volume of a liquid into its weight, or a weight into its volume: litres to kilograms and kilograms to litres, millilitres to grams, gallons to pounds. A litre of water weighs about a kilogram, but a litre of diesel weighs about 0.83 kg, a litre of milk 1.03 kg and a litre of honey 1.43 kg — so the converter multiplies by the right density.
Pick water (at any temperature from 0 to 40 °C), a kitchen liquid (milk, cooking oil, olive oil, ghee, honey), a fuel (petrol, diesel, kerosene, Jet A-1, LPG) or ethanol, or enter a density of your own. Every result shows the density used, where it comes from and the range real liquids fall in, and fuels can be corrected for temperature the way the fuel trade does it.
How to use it
- Choose the Liquid.
- Type the amount in Volume to get the mass, or in Mass to get the volume, and pick the units (litres, millilitres, gallons, kilograms, grams, pounds…).
- For water, fuels and LPG, set the Temperature: water is densest at about 4 °C, and fuels expand as they warm. For LPG choose the propane share, or press a cylinder size such as 14.2 kg.
- If you know the exact density — from a label, a fuel delivery note (density at 15 °C) or a hydrometer — enter it; otherwise the typical density is used.
- Read the result with the density, its source and its range, copy it, or use the table for 1 to 1,000 units.
Examples
1 L of water at 20 °C
0.9982 kg (998.2 kg/m³)
Water is densest, 0.99997 kg/L, at about 4 °C.
1,000 L of diesel at 15 °C
≈ 831.9 kg
Typical density 0.8319 kg/L; at 30 °C the same 1,000 L weighs ≈ 821.2 kg (volume correction factor 0.98707).
1 kg of petrol
≈ 1.345 L
Typical density 0.7435 kg/L; allowed range 0.720–0.775 kg/L at 15 °C.
14.2 kg of LPG, 50 % propane, at 15 °C
≈ 26.1 L of liquid
Pure butane ≈ 24.3 L, pure propane ≈ 28.0 L; at 30 °C the 50/50 mix takes ≈ 27.2 L.
1 L of milk; 1 L of ghee
≈ 1.031 kg; ≈ 0.93 kg
1 kg of honey
≈ 0.698 L (698 mL)
1 US gallon of water at 20 °C
≈ 8.33 lb
Common uses
- Working out the weight of fuel in a tank, a jerrycan or a tanker, or the litres in a tonne.
- Checking a fuel delivery: converting litres to kilograms with the density on the delivery note.
- Knowing how many litres of LPG are in a cylinder sold by weight.
- Converting milk, oil, ghee or honey between litres and kilograms for buying, selling or cooking.
- Shipping and freight: estimating the weight of liquids for a load.
The formula
mass = volume × density and volume = mass ÷ density. With the density in kg/L (the same number as g/mL): 1,000 L of diesel × 0.832 kg/L = 832 kg; 14.2 kg of LPG ÷ 0.543 kg/L = 26.1 L. One kg/L is 1,000 kg/m³.
Where the densities come from
- Water: the CIPM formula for pure, air-free water between 0 and 40 °C (Tanaka et al., Metrologia 38, 301): 0.99984 kg/L at 0 °C, 0.99997 kg/L at about 4 °C, 0.99821 kg/L at 20 °C, 0.99705 kg/L at 25 °C.
- Milk, oils, ghee and honey: the cup weights of USDA FoodData Central — whole milk 244 g, soybean oil 218 g, olive oil 216 g, honey 339 g a US cup of 236.6 mL. Milk varies from 1.028 to 1.038 kg/L with its make-up and milk fat is 0.93 kg/L at 15.5 °C (Tetra Pak Dairy Processing Handbook).
- Petrol, diesel, kerosene and Jet A-1: the typical density is the UK’s official average from its energy statistics (DUKES Table A.3: 1,345 L a tonne of motor spirit, 1,202 of road diesel, 1,249 of burning oil, 1,254 of jet fuel). The ranges are what the fuel standards allow at 15 °C: petrol 0.720–0.775 kg/L (IS 2796, EN 228), Indian BS VI diesel 0.810–0.845 kg/L (IS 1460, as in BPCL’s specification.pdf)), Jet A-1 0.775–0.840 kg/L (DEF STAN 91-091, ASTM D1655).
- LPG: liquid propane (0.5075 kg/L) and butane (0.5843 kg/L) at 15 °C from the NIST Chemistry WebBook, at the temperature and propane share you choose.
- Ethanol: 0.7893 kg/L at 20 °C (PubChem).
Fuel, temperature and the density at 15 °C
Fuel expands as it warms, so the same mass takes up more litres on a hot day. The fuel trade therefore quotes density at 15 °C and corrects measured volumes with the tables of ASTM D1250 / API MPMS Chapter 11.1. This converter uses the generalized-products formula behind those tables: a factor α₁₅ = K₀/ρ₁₅² + K₁/ρ₁₅ for the fuel’s density band, and the volume correction factor VCF = exp(−α₁₅ Δt (1 + 0.8 α₁₅ Δt)), where Δt is the temperature minus 15 °C. The density at the temperature you enter is ρ₁₅ × VCF. Diesel changes by roughly 0.09 % and petrol by roughly 0.12 % per °C.
For an exact figure, enter the density at 15 °C from the delivery note; for a trade measurement, use the official tables or a certified meter.
LPG cylinders
LPG is sold by weight (in India, for example, in 5 kg, 14.2 kg, 19 kg and 47.5 kg cylinders) and stored as a liquid under pressure. Its liquid density depends on the mix of propane and butane and strongly on temperature: a 14.2 kg cylinder of a 50/50 mix holds about 26 litres of liquid at 15 °C and about 27 litres at 30 °C. Cylinders are filled with room left for vapour, so the cylinder itself is larger than the liquid it holds.
Limitations
- Typical densities are averages: a particular batch of fuel, milk or oil can differ by a few per cent. Use your own density when you need an exact figure.
- Kitchen liquids are taken at room temperature and are not corrected for temperature; warm oil and melted ghee are slightly lighter by volume.
- The fuel correction follows the generalized-products formula of ASTM D1250 for an estimate; custody transfer and tax use the official tables and certified meters.
- The tool converts liquids. For flour, sugar and other dry ingredients use Cups to Grams.
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Frequently asked questions
How many kg is 1 litre of water?
0.998 kg at room temperature (0.9982 kg at 20 °C) and almost exactly 1 kg (0.99997 kg) at about 4 °C, where water is densest.
How many kg is 1 litre of diesel?
About 0.83 kg. The UK average is 0.832 kg/L, and Indian BS VI diesel may range from 0.810 to 0.845 kg/L at 15 °C. Warm diesel weighs a little less per litre.
How many kg is 1 litre of petrol?
About 0.74 kg (0.7435 kg/L on average); standards allow 0.720 to 0.775 kg/L at 15 °C. One kilogram of petrol is about 1.35 litres.
How many litres are in a 14.2 kg LPG cylinder?
About 26 litres of liquid for a 50/50 propane–butane mix at 15 °C — between 24.3 L (all butane) and 28.0 L (all propane), and more on a hot day.
How many kg is 1 litre of milk?
About 1.03 kg: whole cow’s milk is 1.031 kg/L by USDA’s cup weight, and milk ranges from 1.028 to 1.038 kg/L.
How many kg is 1 litre of oil or ghee?
Cooking oil is about 0.92 kg a litre (olive oil 0.91 kg); ghee about 0.93 kg a litre at 15.5 °C, a little less when melted.
Why is a litre of fuel lighter in summer?
Fuel expands as it warms: the same kilograms fill more litres. That is why fuel is traded at its density at 15 °C and volumes are corrected for temperature (ASTM D1250).