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About

Converting liters (volume) to kilograms (mass) requires knowing the specific density of the substance, as a liter of mercury weighs far more than a liter of oil. This calculation is a daily requirement for professionals in logistics, culinary arts, and chemistry who must determine the shipping weight of liquid cargo or precise ingredient ratios. While water implies a 1:1 ratio, temperature fluctuations significantly alter its density. This tool provides a pre-validated database of over 30 common fluids, allowing users to calculate mass with high precision. It specifically accounts for the thermal expansion of water, distinguishing between cold supply water and hot boiler water.

density-calculator mass-volume cooking-converter chemistry-tool shipping-weights

Formulas

The formula utilizes the substance's density (ρ) to bridge volume (V) and mass (m).

m = V × ρ

Where density ρ is expressed in kg/L. Since 1 L = 0.001 m³, the density value in kg/L is numerically identical to g/cm³.

Reference Data

SubstanceDensity (kg/L)10 Liters equals:
Water (4°C)1.00010.0 kg
Water (Boiling 100°C)0.9589.58 kg
Gasoline0.7407.40 kg
Diesel Fuel0.8508.50 kg
Olive Oil0.9189.18 kg
Milk (Whole)1.03010.30 kg
Honey1.42014.20 kg
Mercury13.534135.34 kg
Ethanol (Alcohol)0.7897.89 kg
Sea Water1.02510.25 kg
Sulfuric Acid1.84018.40 kg
Liquid Propane0.4934.93 kg

Frequently Asked Questions

As water heats up, its molecules move faster and spread apart, increasing volume and decreasing density. A liter of near-freezing water weighs exactly 1 kg, but a liter of boiling water weighs only about 0.958 kg. This difference is critical for sizing expansion tanks in heating systems.
No. Dry goods have "bulk density", which depends on how tightly they are packed. This tool uses specific gravity for liquids, which is a consistent physical property not affected by packing.
Only for pure water at 4°C. Oil floats on water because it is lighter (approx 0.9 kg/L), while syrups sink because they are heavier (approx 1.3 kg/L).
The values for Gasoline (0.74) and Diesel (0.85) are industry averages. Actual fuel density varies slightly by season and refinery blend, but these values are sufficient for tank weight estimation and shipping logistics.