⬡ Density Conversion

Convert material density and specific gravity units between metric and imperial standards: kilograms per cubic meter (kg/m³), grams per cubic centimeter (g/cm³), and pounds per cubic foot (lb/ft³). Essential for fluid mechanics, material science, shipping freight classification, and civil engineering.

Density conversion calculates equivalent measures across standardized metric, customary, and technical units using fixed mathematical ratios. Standardized in accordance with NIST Special Publication 811 and BIPM SI guidelines, enabling precision calculations between kg/m³, g/cm³, lb/ft³, and 0 additional units.

Metrological Standards & Base Equation

1 g/cm³ = 1,000 kg/m³. 1 kg/m³ ≈ 0.062428 lb/ft³. 1 lb/ft³ ≈ 16.0185 kg/m³.

All density conversion factors on this platform comply with NIST Special Publication 811 (Guide for the Use of the International System of Units) and the BIPM SI Brochure (9th Edition), utilizing exact rational ratios and IEEE-754 double-precision arithmetic to prevent rounding distortion.

Primary References: NIST SP 811 (2008 Edition) · BIPM SI Brochure (2019) · Standards Directory

Supported Density Units (3 Total)

Density Unit Definitions and Scaling Factors
Unit Symbol	Unit Name	System	Equivalent in kg/m³
`kg/m³`	kg/m³	Metric	Reference Standard (1 kg/m³)
`g/cm³`	g/cm³	Metric	1 g/cm³ = 1000 kg/m³
`lb/ft³`	lb/ft³	Imperial	1 lb/ft³ = 16.0185 kg/m³

Popular Density Conversions

g/cm³ to kg/m³

g/cm³ → kg/m³ — standard lab density to SI bulk density

kg/m³ to lb/ft³

kg/m³ → lb/ft³ — metric structural materials to imperial shipping density

Common Use Cases

Material identification and buoyancy calculations
Concrete, steel, and timber structural design
Freight packaging dimensional weight density
Chemistry solution concentration analysis

Frequently Asked Questions

What is the density of pure water?

At 4°C, pure water has a density of exactly 1 g/cm³ or 1,000 kg/m³ (about 62.4 lb/ft³).

How do I convert g/cm³ to kg/m³?

Multiply the density in g/cm³ by 1,000 to get kg/m³.