Fatigue Life Estimator

S-N based cycle-life estimate for preliminary mechanical design.

Stress at N1 (MPa)

N1 cycles

Stress at N2 (MPa)

N2 cycles

Alternating stress Sa (MPa)

Mean stress Sm (MPa)

Ultimate tensile strength Sut (MPa)

About This Tool

This browser-based calculator is intended for quick engineering checks and preliminary estimates.