Density Converter
Kilograms per cubic metre, grams per cubic centimetre, pounds per cubic foot — density units that materials science, cooking, and shipping specifications each default to differently for describing the exact same physical property.
Inputs
Result
1,000 Kilogram/m³
How it works
- 11 Gram/cm³ → base = 1,000
- 2Base → Kilogram/m³ = 1,000
How the density converter works
All units convert through kilograms per cubic metre as the base — 1 Gram/cm³ = 1,000 kg/m³, 1 Pound/ft³ = 16.0185 kg/m³, 1 Pound/gallon (US) = 119.826 kg/m³.
Worked example: water's density, 1 g/cm³, converted to kg/m³
- 1 × 1,000 = 1,000 kg/m³ — confirming the commonly cited reference value for water's density in either unit.
Common mistakes to avoid
Assuming density units convert with the same simple factor as the underlying mass or volume units alone
Density conversions require handling both the mass unit and volume unit simultaneously (since density is mass per volume) — this is why the conversion factors here look more complex than a simple mass-to-mass or volume-to-volume conversion would.
Mixing up specific gravity (a unitless ratio) with density (a unit-bearing quantity)
Specific gravity is density divided by water's density, producing a plain number with no units attached; density itself always carries units (kg/m³, g/cm³, etc.) — treating a specific gravity figure as if it were already in a specific density unit skips a necessary conversion step.
Frequently asked questions
Why is water's density used as such a common reference point?
It's a universally recognisable, easily remembered benchmark (1 g/cm³ or 1,000 kg/m³) that makes it intuitive to judge whether another material is denser or less dense than water, and therefore whether it would sink or float in it.
How is this related to the plain Density Calculator?
That tool computes density directly from a measured mass and volume; this converter translates an already-known density value between different density units, regardless of how it was originally measured or calculated.
Why do US material specifications sometimes use pounds per gallon for density?
It's a conventional unit in certain US industrial and shipping contexts (particularly for liquids), analogous to how other US-specific units (GPM, PSI) persist in their respective industries despite most of the world using metric density units.
Does density change with temperature, and does that affect these conversion factors?
The conversion factors between units are fixed mathematical relationships and don't change with temperature — but the actual density value of a real substance does change with temperature, which is a separate consideration from the unit conversion itself.
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