Density Converter – kg/m³, g/cm³, lb/ft³ & 10+ Units

Density is mass per unit volume (Density = Mass ÷ Volume). SI unit is kg/m³. Water density at 4°C = 1000 kg/m³, used as reference for specific gravity. Higher density = heavier material at same volume.

Most common: kg/m³ ↔ g/cm³ (1000× difference); kg/m³ ↔ lb/ft³ (16.02× difference). Also: g/ml, tons/m³, oz/in³ for specialized applications in chemistry, construction, manufacturing.

1 g/cm³ = 1000 kg/m³ = 62.43 lb/ft³. This is the density of water at 4°C. All organic and inorganic materials are measured against water density as reference (specific gravity).

Material selection (aluminum 2700 kg/m³ vs steel 7850 kg/m³), fluid mechanics, chemistry solution concentrations, geology rock identification, quality control, and physics experiments.

Chemical engineers, material scientists, geologists, physicists, metallurgists, manufacturing engineers, environmental scientists, construction managers, and quality control specialists.

Aluminum density = 2700 kg/m³ = 2.7 g/cm³ = 168.6 lb/ft³. Used extensively in aerospace (lightweight), automotive, and construction because high strength-to-weight ratio.

Steel density = 7850 kg/m³ = 7.85 g/cm³ = 490 lb/ft³. Varies slightly by alloy type. Used in construction, machinery, tools. Much denser than aluminum (2.9× heavier for same volume).

Pure iron density = 7874 kg/m³ = 7.874 g/cm³ = 491.5 lb/ft³. Steel is iron + carbon, so similar density. Iron is magnetic; aluminum and copper are not (different applications).

Copper density = 8960 kg/m³ = 8.96 g/cm³ = 559 lb/ft³. Denser than steel. Used in electrical wiring (excellent conductivity) and plumbing (corrosion resistance).

Water density = 1000 kg/m³ at 4°C (fresh water). Seawater ≈ 1025 kg/m³ (higher salt content). Ice ≈ 917 kg/m³ (why it floats). Used as reference standard for all specific gravity calculations.

Specific gravity = Material density ÷ Water density. Dimensionless number. Gold SG = 19.3 (19.3× denser than water). Metals SG > 1; most plastics SG < 1 (why they float).

Divide kg/m³ by 1000. Example: 7850 kg/m³ ÷ 1000 = 7.85 g/cm³. Reverse: g/cm³ × 1000 = kg/m³. This is most common industrial conversion for material science.

Multiply kg/m³ by 0.0624279. Example: 1000 kg/m³ × 0.0624279 = 62.43 lb/ft³. Reverse: lb/ft³ ÷ 0.0624279 = kg/m³. Used in construction & US engineering specifications.

Real density = mass of material only (no air gaps). Bulk density = mass including air voids between particles. Bulk < Real. Important in powder/granule industries (concrete, sand, chemicals).

Identifies substances (gold vs pyrite), determines if objects float/sink, calculates molarity of solutions, predicts chemical reactions, quality control for purity, and forensic analysis.

1 metric ton/m³ = 1000 kg/m³. In construction & mining, often written as t/m³. Metric ton = 1000 kg. US short ton/ft³ requires different conversion (0.901 metric tons/m³).

Mass known object using scale. Measure volume (water displacement for irregular shapes, or dimensions for regular shapes). Divide mass by volume. Lab precision: use density bottles or hydrometers.