K-Factor Calculator Pro (USA)

Precision Sheet Metal Fabrication Tool

in
in
deg
in
Measure a test piece to find K.
Calculated K-Factor
—
Bend Allowance —
Bend Deduction —
Thickness (T) R Neutral Axis

Expert Guide to K-Factor (USA Standards)

What is K-Factor?
The K-Factor is the ratio of the neutral axis location (t) to the material thickness (T). In the USA, standard K-Factors typically range between 0.30 and 0.50. For mild steel, 0.446 is a commonly used standard approximation for air bending.

How to use this tool:
1. Select “Find K-Factor” if you have a test piece and know the Bend Allowance.
2. Select “Find Bend Allowance” if you already know your K-Factor and need to program your press brake.