Glass Cutting Calculator

Cut list optimization from sheet glass and required pieces.

Short side (mm)

Long side (mm)

Thickness (mm)

Wind pressure (Pa)

Glass type

Support condition

Tab to move between fields

Max deflection (mm)

5.54

Deflection limit L/60 (mm)16.67

Passes deflection check1

Max bending stress (MPa)13.47

Allowable stress (MPa)20

Safety factor1.48

Panel area (m²)1.5

Panel weight (kg)22.5

How to Use This Calculator

Enter the panel Short Side and Long Side in mm and the Glass Thickness in mm.
Enter the Design Wind Pressure in Pascals and select the Glass Type (annealed, heat-strengthened, or tempered).
Select the Support Condition (simply supported or clamped on all four sides).
Review Maximum Deflection and whether it passes the L/60 deflection limit.
Check Maximum Bending Stress vs Allowable Stress and Safety Factor to confirm structural adequacy.

How the result changes with Thickness (mm)

Short side (mm): Shorter dimension of the glass panel.
Long side (mm): Longer dimension of the glass panel.
Thickness (mm): Glass thickness in mm.
Wind pressure (Pa): Design wind pressure in Pascals. 1 kPa ≈ 21 psf.
Glass type: 0 = Annealed, 1 = Heat-strengthened, 2 = Fully tempered.
Support condition: 0 = Simply supported (4 sides), 1 = Fixed/clamped (4 sides).

Max deflection (mm): Maximum center deflection under the applied wind load.
Deflection limit L/60 (mm): Allowable deflection based on span/60 criterion.
Passes deflection check: 1 = within L/60 limit, 0 = exceeds limit.
Max bending stress (MPa): Maximum bending stress in the glass plate.
Allowable stress (MPa): Design allowable stress for the selected glass type.
Safety factor: Ratio of allowable stress to actual stress. Should be > 1.0.
Panel area (m²): Panel area in square meters.
Panel weight (kg): Panel weight in kilograms.

Identify Input Parameters
4 parameters
Short side (mm) = 1000, Long side (mm) = 1500, Thickness (mm) = 6, Wind pressure (Pa) = 1000 = 6 input(s) provided
Calculate Max deflection
Max deflection = deflectionM * 1000
5.54 = 5.54
Calculate Deflection limit L/60
Deflection limit L/60 = (a * 1000) / 60
16.67 = 16.67
Calculate Passes deflection check
1 = 1