How Many Shingles Per Square? (Bundles, Coverage, and Waste)
Most asphalt roofing shingles require 3 bundles per roofing square. One roofing square equals 100 square feet of roof surface.
For example, a 2,000 square foot roof requires 20 roofing squares and typically 60 bundles of shingles before waste.
Shingles Per Roofing Square
| Roof Size (sq ft) | Roofing Squares | Bundles Needed |
|---|---|---|
| 1,200 | 12 | 36 |
| 1,500 | 15 | 45 |
| 2,000 | 20 | 60 |
| 2,400 | 24 | 72 |
| 3,000 | 30 | 90 |
Add 10–15% extra for waste depending on roof complexity.
What Is a Roofing Square?
A roofing square is a unit of roof area equal to 100 square feet. Shingle quantities are often estimated in squares, then converted to bundles based on the coverage listed on your product label.
Bundles Per Square by Shingle Type
| Shingle Type | Bundles Per Square (typical) | Coverage Per Bundle (approx.) |
|---|---|---|
| 3-Tab | 3 | ~33 sq ft |
| Architectural/Dimensional | 3–4 | ~25–33 sq ft |
| Designer/Premium | 4–5 | ~20–25 sq ft |
Always verify your exact product's coverage on the wrapper/spec sheet—bundle coverage can vary by brand and product line.
How Many Bundles for Common Roof Sizes?
| Roof Squares | Bundles (3 per square) | Bundles (4 per square) |
|---|---|---|
| 10 | 30 | 40 |
| 15 | 45 | 60 |
| 20 | 60 | 80 |
| 25 | 75 | 100 |
Tip: Add a waste factor before ordering (see below) and round up to whole bundles. Size your roof area first with the roof squares calculator.
How Much Extra Should You Buy for Waste?
- Simple gable roofs: add 5–10%
- Most roofs: add 10–15%
- Complex roofs or first-time DIY: add 15–20%
Hips, valleys, dormers, and steep pitches increase cuts and waste.
Quick Answer
- 1 square = 100 sq ft of roof area.
- Most shingles use 3 bundles per square.
- Some architectural shingles use 4 bundles per square.
- Add 10% waste (more for complex roofs).
- Ridge caps use different coverage rates.
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Related tools
Ridge cap shingles vs field shingles
Ridge cap shingles are cut differently and cover fewer linear feet per bundle than field shingles. Estimate ridge cap bundles separately.
Waste factors
Valleys, hips, dormers, and starter strips increase waste. Many simple roofs use 10% waste, while complex roofs may need 15% or more.
Pro tip
Add extra waste if you have multiple roof planes or cut-ups.
How to estimate bundles from roof area
- Measure roof area and convert to squares.
- Multiply squares by bundles per square.
- Add waste based on roof complexity.
Example
Example
An 18-square roof with 3 bundles per square and 10% waste needs about 18 × 3 = 54 bundles, plus 6 extra bundles for waste for a total around 60 bundles.
Common mistakes
- Using floor area instead of roof area.
- Ignoring ridge cap bundles in totals.
- Skipping waste on cut-up roofs.
When to ask supplier / pro
For complex roofs or specialty shingles, confirm bundle coverage with your supplier or a roofer before ordering.
Warning
Ordering too little can stall a project. Ordering too much can leave you with non-returnable bundles.
Shingle Quantity FAQs
How much waste should I add?
Add 10% for simple gable roofs and up to 15% for complex roof lines.
Do all shingles require 3 bundles per square?
Most standard asphalt shingles do, but premium or architectural shingles may vary.