Siding Calculator
Calculate siding area minus window openings. Results in m² and siding squares.
How to Use the Siding Calculator
- Enter wall height and total length.
- Enter the number of windows.
- Enter average window area.
- Click Calculate.
Quick Reference
| From | To |
|---|---|
| Small wall (2.5×8 m) | ~20 m² gross |
| Medium house | ~100–150 m² siding |
| 1 square | 9.29 m² (100 ft²) |
| Vinyl siding | ~2 squares/box |
| Average window | ~1.5 m² |
| Waste allowance | +10–15% |
Use Cases
- •Planning exterior siding installation.
- •Ordering vinyl or wood siding.
- •Estimating contractor materials.
- •Comparing siding product costs.
Formula
Net area = Wall height × Wall length − Windows × Window area. 1 square ≈ 9.29 m² (100 ft²).
Frequently Asked Questions
What is a siding square?
A square covers 100 square feet (≈9.29 m²), a standard ordering unit.
Should I add for waste?
Add 10–15% for cuts, corners, and waste.
Is it free?
Yes, all calculators are completely free.