From To kg/m³ g/L mg/L g/mL lb/ft³
kg/m³ 1 1 1000 0.001 0.062428
g/L 1 1 1000 0.001 0.062428
mg/L 0.001 0.001 1 1e-06 6.2e-05
g/mL 1000 1000 1e+06 1 62.428
lb/ft³ 16.0185 16.0185 16018.5 0.016018 1

Each cell shows the factor to convert 1 unit of the row header into the column header.

Highlighted diagonal cells represent identity conversions (1:1).