MAXScanner calculator widget

Siding Calculator — Net Wall Area, Squares, Panels, Waste & Cost

Editable live calculator

Change any input — the result updates immediately

No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Wall 1 length (ft) Wall 1 height (ft) Wall 2 length (ft) Wall 2 height (ft) Wall 3 length (ft) Wall 3 height (ft) Openings excluded (sq ft) Cutting / waste allowance (%) Coverage per package/panel (sq ft) Use installed product coverage, not nominal dimensions.Price per package/panel (optional)

Calculated result

4 packages/panels · 6.82 siding squares

Gross wall area: 700 sq ft

Net area after openings: 620 sq ft

Order target with 10% allowance: 682 sq ft

Purchased coverage: 800 sq ft

Optional package price not entered.

Show the working

1. Gross area = 400 + 300 + 0 = 700 sq ft.
2. Net area = 700 − 80 = 620 sq ft.
3. Order area = 620 × 1.1 = 682 sq ft = 6.82 squares.
4. Packages = ceil(682 ÷ 200) = 4.

Primary siding coverage only. Use installed product coverage from the manufacturer and estimate corners, channels, starter, trim and other accessories separately.

Shared links reopen these inputs; saved calculations stay in this browser unless you clear site data.