Measured Perforated Panel Open Area calculator.
Compare supplied non-overlapping circular perforations with gross panel area and retained material mass.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Open area = hole count × π × hole diameter²/4; open percentage = open area/gross area × 100; retained mass = retained area × thickness × supplied density. Does not determine sound absorption, ventilation performance, fire rating or panel strength.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Measured panel width
- 1 m
- Measured panel height
- 1 m
- Measured hole diameter
- 100 mm
- Supplied non-overlapping hole count
- 10
- Selected panel thickness
- 10 mm
- Supplied solid material density
- 500 kg/m³
Geometric open area: 7.85 %
The supplied holes must be within the panel and non-overlapping; positions are not inferred or validated from a count.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Does not determine sound absorption, ventilation performance, fire rating or panel strength.
All dimensions, properties and application patterns are user-supplied. No building-code default is inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-06. Calculation and review policy.
Check your purchase assumptions
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