Roofing Table: Roofing squares by Total roof area
Reference table of roofing squares for Roofing across a range of total roof area values — exact, engine-computed figures you can read off at a glance.
Roofing Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Roofing squares
20.00
- Shingle bundles (3 per square)
- 60
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Roofing Calculator
The Roofing Calculator works out your roofing squares, along with 1 related figure in an instant. Enter total roof area and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the total roof area.
- Read off your roofing squares, together with shingle bundles (3 per square) — the calculator updates automatically, with no button to press.
Formula
The Roofing Calculator uses the formula:
Roofing squares = Total roof area ÷ 100
Worked example
For example, with total roof area of 2,000 sq ft, the roofing squares is 20.00.
| Total roof area | 2,000 sq ft |
|---|
| Roofing squares | 20.00 |
|---|---|
| Shingle bundles (3 per square) | 60 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Area
- The amount of two-dimensional space a shape covers, measured in square units.
Frequently asked questions
A roofing square is 100 square feet of roof area. A 2,000 sq ft roof is 20 squares.
Standard shingles come about 3 bundles to a square, so a 20-square roof needs roughly 60 bundles, before adding extra for waste.
Yes. Allow around 10% more for cuts, hips, valleys and starter courses, and a little more on complex roofs.
Measure the roof surface, not the floor plan, since pitch increases the area. Multiply length by width for each plane and add them up.
The Roofing Calculator uses the formula: Roofing squares = Total roof area ÷ 100. For example, with total roof area of 2,000 sq ft, the roofing squares is 20.00.
Enter the total roof area. Read off your roofing squares, together with shingle bundles (3 per square) — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Roofing: Formula, Steps & Examples
Learn how to calculate Roofing — the formula explained step by step, with worked examples and a free calculator to check your answer.