How Many Shingles Do I Need? (Bundles & Squares)
Part of Decks, Fences & Roofing
Quick answer
Shingles are sold by the square (100 ft² of roof) and the bundle, with 3 bundles per square for standard architectural shingles. Find your roof area, divide by 100 for the number of squares, multiply by 3 for bundles, then add 10% waste (15% for cut-up or steep roofs). A 2,000 ft² roof is 20 squares — about 66 bundles with 10% waste.
Roofing has its own unit: the square, which is 100 square feet of roof surface. Shingles come in bundles, and it takes 3 bundles to cover one square for standard 3-tab and architectural shingles. So the whole estimate comes down to your roof area in squares.
The steps
- Roof area = footprint ÷ pitch factor (a 6:12 roof is about 1.12× the footprint; steeper roofs are more). Measure the actual roof planes if you can.
- Squares = roof area in ft² ÷ 100.
- Bundles = squares × 3 (for standard shingles).
- Add waste: 10% for a simple gable roof, 15% for lots of hips, valleys and cuts.
Bundles & squares by roof size
| Roof area | Squares | Bundles (+10% waste) |
|---|---|---|
| 1,000 ft² | 10 | 33 |
| 1,500 ft² | 15 | 50 |
| 2,000 ft² | 20 | 66 |
| 2,500 ft² | 25 | 83 |
| 3,000 ft² | 30 | 99 |
The roofing calculator turns your roof's dimensions and pitch into squares, bundles, underlayment and nails with your waste factor built in. Don't forget starter strip and ridge cap — those are bought separately by the linear foot. A bundle of architectural shingles runs about $30–$50. Last verified: June 2026.
FAQs
How many bundles of shingles are in a square?
Three. A square covers 100 ft² of roof, and standard 3-tab and architectural shingles come 3 bundles to the square. Some heavy or designer shingles run 4 or even 5 bundles per square — check the wrapper.
How many shingles do I need for a 2,000 sq ft roof?
About 20 squares, or roughly 60 bundles plus waste (≈66 bundles at 10%). Note that's 2,000 ft² of roof surface — if 2,000 ft² is your house footprint, the sloped roof is larger, so measure the actual roof or apply a pitch factor.
How much extra should I buy for waste?
Add 10% on a simple gable roof and 15% on a complex roof with many hips, valleys and penetrations. Keep a few leftover shingles for future repairs that match your color lot.