Roofing Squares Calculator
Use this roof squares calculator to convert total roof area into roofing squares. One roofing square equals 100 square feet. For example, a 2,400 sq ft roof requires 24 squares before waste. Most roofing projects add 10–15% extra to account for valleys, hips, and cutting loss.
Enter total roof area below to calculate squares instantly. For bundle checks, use the shingle calculator.
What is a Roofing Square?
A roofing square equals 100 square feet of roof surface. It’s the standard unit used by roofing contractors and material suppliers.
Example: A roof measuring 2,400 sq ft = 24 roofing squares.
The roofing industry uses squares instead of square footage because it simplifies material ordering and estimating.
Key conversions:
- 1 square = 100 sq ft
- 1 square = 3 bundles of standard asphalt shingles
- 1 bundle ≈ 33.3 sq ft
Inputs
Enter the total surface area of all roof planes (not floor area). Include overhangs for more accurate totals.
Tip: Typical waste is 10% for simple roofs and 12–15% for hips, valleys, or heavy cut-up layouts.
Pro Tip: If your roof has multiple valleys or dormers, add a few extra bundles beyond the waste percentage.
Results
Assumptions
- Standard material density assumptions are used where applicable for bundle estimates.
- Industry standard conversion formulas are used for squares, bundles, and square footage.
- Waste factor explains extra material for cuts, starter rows, and breakage.
Common Roof Sizes & Squares Needed
| Roof Area (sq ft) | Roofing Squares | With 10% Waste |
|---|---|---|
| 1,200 | 12 | 13.2 |
| 1,500 | 15 | 16.5 |
| 2,000 | 20 | 22 |
| 2,400 | 24 | 26.4 |
| 3,000 | 30 | 33 |
Add 10–15% extra material for complex roof lines.
Example
A 2,000 sq ft roof with 10% waste is about 22 squares of shingles.
Roof Squares FAQs
What is a roofing square?
A roofing square equals 100 square feet of roof surface.
How many bundles are in a square?
Most asphalt shingles require 3 bundles per square, but always confirm manufacturer coverage.
How much waste should I add?
Add 10% for simple gable roofs and up to 15% for complex roofs with valleys and hips.