Engineering Tools
Perforated Metal
Open Area & Weight Calculators
Calculate perforated metal open area, sheet weight, and project estimates for round, square, slot, and custom hole patterns.
Open Area Calculator
Calculate perforation percentage instantly.
5.0 mm
8.0 mm
Calculated Result
35.43%
Total Open Area
Formula
Open Area (%) = (90.69 x D^2) / T^2
D^2 = 5^2 = 25.00
T^2 = 8^2 = 64.00
D^2 / T^2 = 25.00 / 64.00 = 0.3906
90.69 x ratio = 35.43%
Density: 7.85 g/cm^3
Weight Calculator
Estimate solid and perforated sheet weight.
Perforated Weight
30.19kg
Solid Weight
46.74 kg
Weight Saved
-16.54 kg
Calculation Logic
Volume = Length x Width x Thickness
Solid Weight = Volume x Density
Perforated Weight = Solid Weight x (1 - Open Area / 100)
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