Volume to Mass Calculator — Convert Volume to Weight
Convert a volume into mass (weight) for water, metals, liquids, gases or any custom material. Pick the substance, enter the volume in your preferred unit, and instantly see the mass in grams, kilograms, pounds and ounces.
Volume unit
Material / substance
Kilograms — based on volume × density
- 1
Volume in cm³
1 L × 1 L/L × 1000 = 1,000 - 2
Density used
1 g/cm³ = 1 - 3
Mass in grams
1,000 cm³ × 1 g/cm³ = 1,000 - 4
Mass in kilograms
1,000 g ÷ 1000 = 1
How does this calculator work?
mass = volume × density. Enter a volume in any unit (mL, L, m³, fl oz, etc.) and pick a substance to instantly get the mass in g, kg, lb and oz. Fourteen common materials are pre-loaded; use the Custom option to enter any density in g/cm³.
Formula
How this is calculated
The relationship between mass, volume and density is mass = volume × density. Density is a material property — how much mass is packed into a unit of volume — expressed in grams per cubic centimetre (g/cm³), which is the same as kg/L or tonnes/m³ numerically scaled. To find mass, you simply multiply the volume (converted to cm³) by the density.
This calculator includes reference densities for 14 common substances. The values are approximate standards: water at 1.000 g/cm³ is the SI-defined baseline at 4 °C; metals like steel (7.85), aluminium (2.7) and gold (19.3) are typical alloy/ingot values; liquids like ethanol (0.789) and honey (1.42) vary with temperature and composition. For unlisted materials, choose "Custom" and enter the known density.
Results are given in grams, kilograms, pounds and ounces. Note that "weight" in everyday language means mass measured under Earth gravity; this calculator computes mass. True weight (force) in newtons = mass × 9.81.
Frequently asked questions
Because they have different densities — the amount of matter packed into each unit of volume. A litre of mercury (density 13.5 g/cm³) contains 13.5 times more mass than a litre of water (1.0 g/cm³), even though the volumes are identical.
The values are typical reference figures, not precise laboratory measurements. Density varies with temperature, pressure, purity and alloy composition. For critical applications use a certified material safety data sheet or laboratory measurement and enter the exact density in the custom field.
Gases have very low densities that depend strongly on temperature and pressure. Air at sea level (15 °C) is approximately 0.001225 g/cm³. Use the custom density field with the value from a gas property table at your specific conditions (temperature, pressure, humidity).
Also known as
TG we-Calculate Editorial Team. (2026). Volume to Mass Calculator — Convert Volume to Weight [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/volume-to-mass-calculator
TG we-Calculate Editorial Team. "Volume to Mass Calculator — Convert Volume to Weight." TG we-Calculate. 2026. https://we-calculate.com/calculator/volume-to-mass-calculator.
TG we-Calculate Editorial Team, "Volume to Mass Calculator — Convert Volume to Weight," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/volume-to-mass-calculator
@misc{wecalculate_volume_to_mass_calculator, title = {Volume to Mass Calculator — Convert Volume to Weight}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/volume-to-mass-calculator}}, year = {2026}, note = {TG we-Calculate} }
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