OhMyCalc

Siding Calculator

Calculate siding area minus window openings. Results in m² and siding squares.

How to Use the Siding Calculator

  1. Enter wall height and total length.
  2. Enter the number of windows.
  3. Enter average window area.
  4. Click Calculate.

Schnellreferenz

VonNach
Small wall (2.5×8 m)~20 m² gross
Medium house~100–150 m² siding
1 square9.29 m² (100 ft²)
Vinyl siding~2 squares/box
Average window~1.5 m²
Waste allowance+10–15%

Anwendungsfälle

Formel

Net area = Wall height × Wall length − Windows × Window area. 1 square ≈ 9.29 m² (100 ft²).

Häufig gestellte Fragen

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.