Roofing Squares Calculator
Convert roof area into roofing squares.
Last updated 2026-08-21
What Is a Roofing Squares Calculator?
A roofing squares calculator converts a measured roof area into roofing squares, the standard unit roofers and suppliers use to quote materials and labor. One square equals 100 sq ft of roof surface. It is the simplest way for a homeowner to talk the same language as a contractor when requesting a quote.
How It Works
Squares = Roof area ÷ 100. Bundles = Squares × 3.
Example
A 2,500 sq ft roof is 25 squares → 75 bundles of shingles.
How to Calculate
- Measure the surface area of each roof plane by multiplying length by width, then add every plane together. A house with two 1,250 sq ft planes has a 2,500 sq ft roof.
- Enter the total roof area into the calculator, such as 2,500 sq ft.
- Read the squares: 2,500 sq ft ÷ 100 = 25 squares.
- Multiply squares by 3 to get bundles. 25 squares × 3 = 75 bundles of standard shingles.
- Add your own waste factor when ordering, since squares measure the actual roof and do not include waste.
Converting Roof Area to Squares
| Roof Area (sq ft) | Squares | Bundles (3 per square) |
|---|---|---|
| 1,000 | 10 | 30 |
| 1,500 | 15 | 45 |
| 2,000 | 20 | 60 |
| 2,500 | 25 | 75 |
| 3,000 | 30 | 90 |
Sources
Frequently Asked Questions
What exactly is one square?
A square is 100 sq ft of roofing surface, the standard unit used by roofers and suppliers.
How do I measure my roof area?
Measure each roof plane (length × width) and add them together, then divide by 100.
Does one square include waste?
No — squares measure the actual roof. Add waste separately when ordering.
Estimate the cost with the Roofing Cost Calculator or browse Roofing Calculators