Spring calculators

Spring unit converter

Convert length (mm ↔ in), force (N ↔ lbf), spring rate (N/mm ↔ lbf/in) and torque (N·mm ↔ lbf·in) — the units springs are specified in.

Length
mm
=
in
Force
N
=
lbf
Spring rate
N/mm
=
lbf/in
Torque
N·mm
=
lbf·in

We standardize calculations in metric units (mm, N, MPa). Use this converter to work with imperial drawings and suppliers.