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Siding Calculator
Measurements
Wall Measurements
Gable Measurements (optional)
Door and Window Measurements (optional)
Exposure & Waste
| Options Selected | |
|---|---|
| Width of side (feet) | — |
| Height of side (feet) | — |
| Height of Gable (feet) | — |
| Door/Window Area (sq. feet) | — |
| Exposure Used | — |
| Waste Added | — |
| Calculated Materials | Result | |
|---|---|---|
| Total Siding Area (sq. feet) | — | |
| Standard 100 sqft. Vinyl Siding | — | |
| Smartside LP 0.315" × 12" × 16' | — | |
| Hardie Lap 5/16" × 8-1/4" × 12' | — | |
* 7" was used as the exposure in the above trim results.
10% has been added to the materials for waste or other needs that may arise.
Key Features
✔ Contractor-ready inputs for wall width/height, gable height, and door/window openings, all in feet or square feet.
✔ Accurate gable calculation using the triangular area formula (½ × width × gable height) automatically added to wall measurements.
✔ Automatic waste factor with a built-in option to add 10% for cutting, overlaps, and project contingencies.
✔ Material breakdown showing required squares, plus panel counts for common products like SmartSide LP and Hardie Lap based on exposure settings.
✔ Summary tool to combine totals from multiple sides of a house, giving an all-in one material estimate.
✔ Practical outputs with clear readouts of total area, squares, and panel counts so contractors can order confidently.
How to Use It
- Measure wall dimensions: Enter the Width of Side and Height of Side in feet.
- Add gable height (if applicable): Measure from the roof peak to the wall line and enter the Height of Gable. If no gable, leave at 0.
- Subtract openings: Enter the total square footage of windows and doors to exclude them from siding coverage.
- Apply waste factor: Check the waste option to add 10% automatically.
- Review results: Click Calculate. The tool displays Total Area, Squares, and required panel counts for SmartSide LP and Hardie Lap.
- Use the summary tool: Enter values for each side of the house to combine them into a project-wide total.
Plan Your Siding Project with Confidence
Our Siding Calculator saves time and eliminates costly errors by converting wall and gable measurements into siding material needs instantly. With allowances for openings and waste, plus direct panel counts for popular products, you’ll know exactly what to order for every side of your home. Simplify your siding takeoff, avoid shortages, and keep your project on track with this accurate, contractor-friendly tool.
Questions about any of our products?
We're ready to help you find a solution!
