Pressure Vessel Calculator

Calculate hoop and axial stress for thin-walled and thick-walled cylindrical pressure vessels online. Includes Lamé equations and safety factor — free engineering calculator

Input Parameters

σ_h = pr/t (Hoop stress)

σ_a = pr/(2t) (Axial stress)

Internal Pressure p (MPa)

Inner Radius r (mm)

Wall Thickness t (mm)

Allowable Stress (MPa)

Results

Hoop Stress σ_h

500.00 MPa

Axial Stress σ_a

250.00 MPa

von Mises Stress

433.01 MPa

Safety Factor

0.346

✗ Exceeds allowable stress

r/t = 50.0 (Thin-wall: r/t ≥ 10 ✓)