Factor of Safety Calculator
Calculate static factor of safety and fatigue life using Goodman and Soderberg criteria
Factor of Safety Calculator
Calculate static factor of safety or fatigue safety factor using Goodman or Soderberg criteria.
Design is SAFE
Formula
How to Use This Calculator
Select the failure theory
Choose Goodman, Soderberg, or static yield for the appropriate fatigue or static loading scenario.
Enter stress components and material properties
Input the mean stress, alternating stress, ultimate tensile strength (Sut), and endurance limit (Se).
Read the factor of safety
The calculator applies the selected criterion and returns the factor of safety (n). Values below 1 indicate predicted failure.
Formula Reference
Goodman Criterion
σa/Se + σm/Sut = 1/n
Variables: σa = alternating stress, σm = mean stress, Se = endurance limit, Sut = ultimate tensile strength, n = factor of safety
When to Use This Calculator
- •Use the Factor of Safety Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
- •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
- •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
- •Use it to generate reference data for a technical report or presentation without manual computation.
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