Density Unit Conversion Tool

Density Conversion

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Real-time Conversion (Enter any value to see common units)

Kilograms per Cubic Meter (kg/m³)

Grams per Cubic Centimeter (g/cm³)

Grams per Milliliter (g/mL)

Tons per Cubic Meter (t/m³)

Grams per Liter (g/L)

Pounds per Cubic Foot (lb/ft³)

Pounds per Cubic Inch (lb/in³)

Pounds per US Gallon (lb/gal)

Kilograms per Liter (kg/L)

Common Substance Density Reference (at standard temperature and pressure)

Substance	Kilograms per Cubic Meter (kg/m³)	Grams per Cubic Centimeter (g/cm³)	Pounds per Cubic Foot (lb/ft³)
Gas
Air (0°C)	1.293	0.001293	0.0807
Hydrogen	0.0899	0.0000899	0.0056
Oxygen	1.429	0.001429	0.0892
Carbon Dioxide	1.977	0.001977	0.1234
Liquid
Water (4°C)	1000	1.000	62.43
Seawater	1025	1.025	64.0
Ice	917	0.917	57.2
Alcohol (Ethanol)	789	0.789	49.3
Gasoline	680-740	0.68-0.74	42-46
Diesel	820-950	0.82-0.95	51-59
Engine Oil	880-940	0.88-0.94	55-59
Milk	1030	1.030	64.3
Blood	1060	1.060	66.2
Mercury	13546	13.546	845.7
Solid - Metal
Aluminum	2700	2.70	168.6
Iron	7874	7.874	491.5
Copper	8960	8.96	559.4
Lead	11340	11.34	708.0
Silver	10490	10.49	654.9
Gold	19320	19.32	1206.0
Platinum	21450	21.45	1339.0
Steel (Stainless Steel)	7850-8000	7.85-8.00	490-500
Solid - Non-Metal
Wood (Pine)	400-600	0.4-0.6	25-37
Wood (Oak)	600-900	0.6-0.9	37-56
Concrete	2300-2500	2.3-2.5	144-156
Glass	2400-2800	2.4-2.8	150-175
Plastic (PVC)	1300-1600	1.3-1.6	81-100
Rubber	900-1200	0.9-1.2	56-75
Brick	1600-2000	1.6-2.0	100-125
Sand	1500-1700	1.5-1.7	94-106
Diamond	3520	3.52	219.7
Graphite	2260	2.26	141.1

Conversion Relationships

Metric Units (based on kilograms per cubic meter)

1 kilogram per cubic meter (kg/m³) = Base Unit

1 gram per cubic centimeter (g/cm³) = 1,000 kilograms per cubic meter (kg/m³)

1 gram per milliliter (g/mL) = 1,000 kilograms per cubic meter (kg/m³)

1 milligram per cubic millimeter (mg/mm³) = 1,000 kilograms per cubic meter (kg/m³)

1 ton per cubic meter (t/m³) = 1,000 kilograms per cubic meter (kg/m³)

1 gram per liter (g/L) = 1 kilogram per cubic meter (kg/m³)

1 kilogram per liter (kg/L) = 1,000 kilograms per cubic meter (kg/m³)

1 milligram per liter (mg/L) = 0.001 kilograms per cubic meter (kg/m³)

Imperial Units

1 pound per cubic foot (lb/ft³) ≈ 16.0185 kilograms per cubic meter (kg/m³)

1 pound per cubic inch (lb/in³) ≈ 27,679.9 kilograms per cubic meter (kg/m³)

1 pound per US gallon (lb/gal US) ≈ 119.826 kilograms per cubic meter (kg/m³)

1 pound per UK gallon (lb/gal UK) ≈ 99.7764 kilograms per cubic meter (kg/m³)

1 oz/in³ ≈ 1729.99 kg/m³

1 oz/gal US ≈ 7.4892 kg/m³

1 oz/gal UK ≈ 6.2360 kg/m³

Other Units

1 slug/ft³ ≈ 515.379 kg/m³

1 psi/ft ≈ 22620.6 kg/m³

Density Formula

Density (ρ) = Mass (m) ÷ Volume (V)

Mass (m) = Density (ρ) × Volume (V)

Volume (V) = Mass (m) ÷ Density (ρ)

Relative Density (Specific Gravity)

Relative Density = Density of substance ÷ Density of reference substance

Usually referenced to the density of water at 4°C (1000 kg/m³)

Example: Relative density of aluminum = 2700 kg/m³ ÷ 1000 kg/m³ = 2.7

Application Areas

kg/m³, g/cm³: Physics, Chemistry, Engineering, Scientific Research

g/mL: Laboratory, Medicine, Pharmacy

lb/ft³: Construction, Materials Science (USA)

t/m³: Large-scale Engineering, Mining, Metallurgy

mg/L: Environmental Monitoring, Water Quality Analysis

g/L: Chemical Industry, Brewing, Food Industry

Density and Temperature

Density usually changes with temperature. Most substances decrease in density as temperature rises (volume expands), but water is an exception between 0-4°C, with maximum density at 4°C. Precise measurements should specify the temperature.

Batch conversion (one value per line, format: value unit)

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About Density Units:

Density:The ratio of a substance's mass to its volume, reflecting how compact the substance is. Density is one of the fundamental physical properties of matter, varying between different materials.

Kilograms per Cubic Meter (kg/m³):The standard unit of density in the International System of Units, widely used in scientific research and engineering calculations.

Grams per Cubic Centimeter (g/cm³):Common density units numerically equal to relative density (specific gravity). 1 g/cm³ = 1000 kg/m³. Water’s density is approximately 1 g/cm³, serving as a common reference standard.

Pounds per Cubic Foot (lb/ft³):Density units in the Imperial system, mainly used in the US construction and materials industries.

Practical Applications:Density plays a key role in material selection, buoyancy calculations, purity identification, and composition analysis. For example, aerospace materials require low density and high strength, while submersible materials need appropriate density to achieve neutral buoyancy.

Notes:Density is affected by temperature, pressure, and other factors, which must be considered for precise measurements and calculations. Density changes are relatively small for solids and liquids but highly sensitive to temperature and pressure variations in gases.