Glass Thickness Calculator
Engineering precision for circular glass discs under pressure
Calculate Required Glass Thickness
Determine the minimum thickness of circular flat glass discs needed to safely withstand pressure differentials. Based on engineering formulas from Roark's Formulas for Stress and Strain.
Precise Engineering Formula
Based on plate stress analysis and material properties
Real-Time Calculation
Instant results as you adjust parameters
Safety Factor Included
Configurable safety margins (4.0 - 6.0)
Input Parameters
Range: 10 - 300 mm
1 bar ≈ 14.5 PSI (1 atm)
MR = Modulus of Rupture (Design Tensile Strength)
Engineering Formula:
Thk = √(1.1 × P × r² × SF / MR)
Where: P = Pressure (PSI), r = Radius (mm), SF = Safety Factor, MR = Modulus of Rupture (PSI)
Calculation Result
Calculation successful
Minimum Required Thickness
≈ 0.210 inches
Design Recommendation
Always verify calculations with material certifications and apply appropriate safety factors for your specific application.
Technical Reference
Glass Properties
- •Borosilicate: MR = 7,000 PSI
- •Fused Silica: MR = 7,000 PSI
- •Safety Factor: 4.0 - 6.0
Unit Conversions
- •1 bar = 14.5038 PSI
- •1 MPa = 145.038 PSI
- •1 inch = 25.4 mm
Formula Details
- •Based on Roark's Formulas
- •Fixed edge boundary condition
- •Uniform pressure loading