Factor of Safety Calculator
Calculate factor of safety from material strength and applied working stress.
Enter your values
Use the units shown and enter valid values.
Calculation Result
Results are calculated from your inputs.
How It Works
Calculate factor of safety from material strength and applied working stress.
Use the result as an engineering calculation aid and verify critical designs against applicable standards and manufacturer specifications.
How to use this calculator
What to enter
Enter or select the following as requested: Material strength; Applied / working stress; Stress unit. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The engineering result is calculated from the dimensions, loads, material properties, flow conditions, or operating values entered. Check the unit system, material assumptions, boundary conditions, safety factor, and whether the model represents static, dynamic, or ideal conditions.
When to use it
Use this for preliminary engineering calculations or to check a worked problem. Verify assumptions and applicable design standards with a qualified engineer before using the result to design, size, or operate load-bearing or safety-critical equipment.