What is the density formula?

Density (ρ) equals mass (m) divided by volume (V): ρ = m/V. This fundamental equation can be rearranged to find any variable: m = ρ × V to find mass, or V = m/ρ to find volume. The SI unit for density is kilograms per cubic meter (kg/m³).

What is the density of water?

Water has a density of 1000 kg/m³ (or 1 g/cm³) at 4°C, its maximum density. At 20°C (room temperature), water density is 998 kg/m³. This value is often used as a reference point - materials less dense than water float, while denser materials sink.

How do I convert between density units?

Common conversions: 1 g/cm³ = 1000 kg/m³ = 1 kg/L. For imperial: 1 lb/ft³ ≈ 16.02 kg/m³. The calculator automatically converts between SI (kg/m³, g/cm³) and imperial (lb/ft³, lb/in³) units, showing results in multiple formats.

Why does density matter in engineering?

Density is crucial for material selection (weight vs. strength), buoyancy calculations (will it float?), structural loading (building/vehicle weight), fluid dynamics (pipe sizing, pump selection), and quality control (detecting material purity or voids).

How does temperature affect density?

Most materials expand when heated, decreasing density. Water is unusual - it's most dense at 4°C and less dense when warmer or cooler. Gases are highly sensitive to temperature: air at 0°C is about 10% denser than at 30°C. Always note the reference temperature when comparing densities.

What are the densities of common metals?

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Frequently Asked Questions

01What is the density formula?

02What is the density of water?

03How do I convert between density units?

04Why does density matter in engineering?

05How does temperature affect density?

06What are the densities of common metals?