Factor of Safety Calculator
fos = strength / appliedStress
Material Type
Ductile (e.g., mild steel)
Brittle (e.g., cast iron)
Composite
Custom
Material Preset
Select or enter custom
Mild Steel
Stainless Steel
Cast Iron
Aluminum
Copper
Glass
Hard Plastic
Titanium
Yield Strength (MPa)
Ultimate Strength (MPa)
Young's Modulus (GPa)
Poisson's Ratio
Applied Stress (MPa)
Safety Standard
General Machinery
Aerospace
Automotive
Construction
Pressure Vessel
Custom FOS
Custom Factor of Safety
Calculate Factor of Safety
Stress and Strain Calculator
stress = force / area
strain = (finalLength - initialLength) / initialLength
Force (N)
Cross-sectional Area (mm²)
Initial Length (mm)
Final Length (mm)
Young's Modulus (GPa)
Calculate Stress & Strain
Bending Stress Calculator
bendingStress = bendingMoment / sectionModulus
Bending Moment (N·mm)
Beam Type
Rectangular
Circular
I-beam
H-beam
Pipe
Square Tube
Hexagon
Custom Section
Width (mm)
Height (mm)
Diameter (mm)
Height (mm)
Width (mm)
Web Thickness (mm)
Flange Thickness (mm)
Height (mm)
Width (mm)
Web Thickness (mm)
Flange Thickness (mm)
Outer Diameter (mm)
Wall Thickness (mm)
Side Length (mm)
Wall Thickness (mm)
Side Length (mm)
Section Modulus (mm³)
Or enter expression (e.g., "b*h^2/6")
Variables (e.g., "b=50,h=100")
Calculate Bending Stress
Internal Stress Calculator
Axial
Torsion
Combined
Axial Force (N)
Cross-sectional Area (mm²)
Calculate Axial Stress
Torque (N·mm)
Polar Moment of Inertia (mm⁴)
Outer Radius (mm)
Calculate Torsion Stress
Normal Stress (MPa)
Shear Stress (MPa)
Failure Theory
Maximum Normal Stress
Maximum Shear Stress (Tresca)
Von Mises
Calculate Equivalent Stress