kN/m³ to lb/ft³ — Density & Unit Weight Converter

1 kN/m³ = 6.36588 lb/ft³. Use this for unit weight conversion between metric and imperial notation.

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kN/m³
Converted value0
Formula:
lb/ft³ is also commonly called pcf.
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kN/m3 to lb/ft3 formula

lb/ft³ = kN/m³ × 6.36588. Example: 20 kN/m³ = 127.32 lb/ft³.

Alias

lb/ft³ is often written as pcf. The calculator keeps both meanings on the same page to avoid duplicate intent.

Check whether lb/ft³ means mass density or unit weight

Engineering tables sometimes use pcf or lb/ft³ without making the physical quantity obvious. This calculator uses unit weight in lbf/ft³: 1 kN/m³ = 6.36588 lbf/ft³, so 20 kN/m³ is about 127.32 lbf/ft³. If your source instead gives lbm/ft³, that is mass density rather than force per volume. Check the table heading or source notes before using the value so that lbm/ft³ and lbf/ft³ are not mixed.