Mass Divided by Volume

How heavy is a liter of aluminum vs. steel? Our Density Converter translates between all common density units: kg/m³, g/cm³, lb/ft³, and more. Essential for material science, chemistry calculations, shipping/logistics (mass from volume), and anyone working with physical materials. Enter any density and convert across metric and imperial systems instantly!

Water as the Reference

Pure water at 4°C has a density of exactly 1 g/cm³ (1000 kg/m³)—the foundational reference for all density comparisons. Things less dense than water float (wood, ice, oils); denser things sink (metals, rocks). This converter helps engineers select materials, calculate buoyancy, and design everything from boats to beverages!

Extreme Density: Osmium is the densest natural element at 22.6 g/cm³—twice as dense as lead! Meanwhile, aerogel (solid!) can be just 0.001 g/cm³, lighter than air.

Density Converter