Density Converter

The most common density conversion is g/cm³ to kg/m³. Since 1 g/cm³ equals 1000 kg/m³, you multiply by 1000 to convert. Water has a density of 1 g/cm³ (1000 kg/m³), making it a convenient reference point.

To convert lb/ft³ to kg/m³, multiply by 16.01846. For example, concrete at about 150 lb/ft³ equals approximately 2403 kg/m³. This conversion is common in US construction and materials engineering.

Water at 4°C has a density of 1000 kg/m³, 1 g/cm³, 1 kg/L, 1000 g/L, 62.43 lb/ft³ or 8.345 lb/gal. Water's convenient density of exactly 1 g/cm³ is why this unit is so popular in chemistry.

Chemists prefer g/cm³ because most lab samples are small volumes measured in milliliters (1 mL = 1 cm³) and weighed in grams. In g/cm³, common materials have easy-to-remember values: water is 1, aluminum is 2.7, iron is 7.87 and gold is 19.3.

To convert kg/L to lb/gal, multiply by 8.3454. For example, a wort with a density of 1.050 kg/L equals about 8.763 lb/gal. Brewers use density to measure sugar content and predict alcohol levels during fermentation.