How Many Bundles of Shingles for 1,800 sq ft?
1,800 sq ft of roof surface is 18 roofing squares. With 10% waste and standard 3-bundle-per-square shingles you need 60 bundles. If 1,800 sq ft is the house footprint rather than the roof, multiply by the pitch factor first: at a 6/12 pitch that becomes 67 bundles.
Bundles for 1,800 sq ft of roof by waste factor
| Waste | Squares | 3 bundles / square | 4 bundles / square |
|---|---|---|---|
| 5% (simple gable) | 18.9 | 57 | 76 |
| 10% (typical) | 19.8 | 60 | 80 |
| 15% (hips & valleys) | 20.7 | 63 | 83 |
| 20% (complex, cut-up) | 21.6 | 65 | 87 |
If 1,800 sq ft is the house footprint
Shingles cover the sloped roof, not the floor plan. Multiply the footprint (including overhangs) by the pitch factor to get roof surface:
| Pitch | Roof surface | Squares (+10%) | Bundles |
|---|---|---|---|
| 3/12 | 1,855 sq ft | 20.4 | 62 |
| 4/12 | 1,897 sq ft | 20.9 | 63 |
| 5/12 | 1,950 sq ft | 21.5 | 65 |
| 6/12 | 2,012 sq ft | 22.1 | 67 |
| 7/12 | 2,084 sq ft | 22.9 | 69 |
| 8/12 | 2,163 sq ft | 23.8 | 72 |
| 9/12 | 2,250 sq ft | 24.8 | 75 |
| 10/12 | 2,343 sq ft | 25.8 | 78 |
| 12/12 | 2,546 sq ft | 28 | 85 |
3 bundles per square, 10% waste. Don't know your pitch? Measure it with the Pitch Gauge.
Shingle cost for 1,800 sq ft
| Shingle type | Material per square | Total for 1,800 sq ft (+10%) |
|---|---|---|
| 3-tab shingles | $80–$120 | $1,584–$2,376 |
| Architectural shingles | $100–$160 | $1,980–$3,168 |
| Premium shingles | $160–$250 | $3,168–$4,950 |
Shingles only. Underlayment, flashing, ridge cap, disposal and labour are extra.
Nails and underlayment
| Underlayment | Typical roll coverage | Rolls (+10% laps) |
|---|---|---|
| Synthetic underlayment | 1,000 sq ft | 2 |
| #15 felt | 400 sq ft | 5 |
| #30 felt | 200 sq ft | 10 |
Nails: about 6,336 with a standard 4-nail pattern, or 9,504 with a 6-nail high-wind pattern. Check roll labels: coverage varies by brand.
Frequently asked questions
How many bundles of shingles do I need for 1,800 sq ft?
For 1,800 sq ft of roof surface you need 60 bundles of standard shingles (3 bundles per square) including 10% waste, or 63 bundles with 15% waste for a roof with hips and valleys. Heavier shingles packed 4 bundles per square need 80 bundles.
How many squares is 1,800 sq ft?
A roofing square is 100 sq ft, so 1,800 sq ft is 18 squares, or 19.8 squares once you add 10% for waste.
Is 1,800 sq ft the house size or the roof size?
Shingles are ordered by roof surface, which is larger than the house footprint because of the slope and overhangs. If 1,800 sq ft is your footprint, multiply it by your pitch factor: at 6/12 the roof is 2,012 sq ft and needs 67 bundles.
How much do shingles for 1,800 sq ft cost?
At typical material prices, shingles for 1,800 sq ft of roof (with 10% waste) cost about $1,584–$2,376 for 3-tab shingles, $1,980–$3,168 for architectural shingles, $3,168–$4,950 for premium shingles. That is materials only; installation usually costs more than the shingles.