Materials
How Many Roofing Nails Per Square? Coil, Bundle and Box Counts
Reviewed by the My Roof Pitch editorial team · Updated
A standard three-tab or architectural shingle roof uses about 320 nails per square with 4 nails per shingle, or 384-480 with 5-6 nails per shingle in high-wind zones. A 7,200-count coil covers roughly 20-22 squares at 4 nails per shingle, and one pound of roofing nails holds about 110-130 nails depending on length and shank type.
Key takeaways
- Standard fastening is 4 nails per shingle = about 320 nails per square (100 sq ft) for a typical 3-tab or architectural shingle at 5-5/8 inch exposure.
- IRC 2021 and most manufacturer warranties require 6 nails per shingle in high-wind zones (generally 110+ mph design wind speed), raising counts to about 480 nails per square.
- A 7,200-nail coil (common box size for coil roofing nailers) covers about 22 squares at 4 nails/shingle, or about 15 squares at 6 nails/shingle.
- One pound of 1-1/4 inch smooth shank roofing nails holds roughly 120-130 nails; ring-shank and hot-dip galvanized nails run slightly fewer per pound due to coating and barb mass.
- Hip and ridge cap shingles add 2 nails per cap piece and are ordered separately from field nail counts.
- Always round up nail boxes/coils per roof, not per square, to avoid opening a second box for the last few shingles.
Nails per square: the baseline numbers
A roofing 'square' covers 100 square feet of roof. Standard three-tab shingles cover about 33.3 sq ft per bundle (3 bundles per square) at a 5-inch exposure, and architectural (laminated) shingles typically cover about 33.3 sq ft per bundle as well, though bundle count per square can run 3-5 depending on the product. Nail count, however, tracks shingles, not bundles, because fastening code is specified per shingle.
| Nails per shingle | Use case | Nails per square (approx.) | Nails per 3-bundle square |
|---|---|---|---|
| 4 | Standard field nailing, most US codes below 110 mph | 320 | 107/bundle |
| 5 | Steep slope (>21:12) or some manufacturer specs | 400 | 133/bundle |
| 6 | High-wind zones (110 mph+ design wind, IRC Table R905.2.6.1) | 480 | 160/bundle |
These figures assume a standard 3-tab or laminated strip shingle around 36 inches wide with a 5 to 5-5/8 inch exposure, giving roughly 80 shingles per square. Wider or narrower exposure shingles shift the shingle count per square and therefore the nail count proportionally — always check the shingle wrapper's 'shingles per square' figure before finalizing an order.
IRC fastening requirements that drive nail count
IRC 2021 Section R905.2.6 sets the baseline at 4 fasteners per strip shingle for roofs in areas with a basic wind speed under 110 mph, moving to 6 fasteners per shingle at or above 110 mph (Table R905.2.6.1). Steeper roofs over 21:12 also get special fastening guidance since gravity assist on steep slopes is reduced relative to lateral wind uplift, and some manufacturers call for extra nails or sealant strips regardless of code minimums to maintain wind-rated warranty coverage.
Coil nails per square and boxes needed
| Box size (nail count) | Coverage at 4 nails/shingle | Coverage at 6 nails/shingle |
|---|---|---|
| 3,600 (standard wire coil case) | ~11.25 squares | ~7.5 squares |
| 4,500 (15-degree wire coil case) | ~14 squares | ~9.4 squares |
| 7,200 (common 15° plastic collated case) | ~22.5 squares | ~15 squares |
| 9,000 (bulk coil case) | ~28 squares | ~18.75 squares |
Worked example: a 2,400 sq ft roof (24 squares) in a standard wind zone at 4 nails/shingle needs 24 × 320 = 7,680 nails. One 7,200-count case covers 22.5 squares, so this roof needs a second case started — order two cases rather than one, since a job can't be finished on 95% of a box.
In a high-wind zone at 6 nails/shingle, the same 24-square roof needs 24 × 480 = 11,520 nails — two 7,200 cases (14,400 nails) with roughly 2,880 left over, or better, one 7,200 case plus one 4,500 case for closer to the exact count with less waste.
Pounds of roofing nails per square
| Nail type | Length | Nails per pound (approx.) |
|---|---|---|
| Smooth shank electro-galvanized | 1-1/4 in | 125-130 |
| Smooth shank hot-dip galvanized | 1-1/4 in | 115-125 |
| Ring shank galvanized | 1-1/4 in | 100-110 |
| Smooth shank electro-galvanized | 1-3/4 in | 85-95 |
| Ring shank galvanized | 1-3/4 in | 75-85 |
To convert a per-square nail count to pounds: divide nails per square by nails per pound. At 320 nails/square and 125 nails/lb (1-1/4 inch smooth shank), that's 320 ÷ 125 = 2.56 lb per square. For a 24-square roof, order about 62 lb of nails, rounding up to the nearest bulk box size your supplier carries (commonly 25 lb or 50 lb boxes).
Choosing the right nail length
Nail length is a penetration question, not a nail-count question, but it affects which boxes you can actually use. IRC and most shingle manufacturers require nails to penetrate at least 3/4 inch into the roof deck, or to fully penetrate OSB/plywood decking that is thinner than 3/4 inch. For a typical 7/16 inch OSB deck plus one layer of 3-tab or laminate shingle (about 1/8 to 3/16 inch thick) plus synthetic underlayment, a 1-1/4 inch nail is the standard choice and clears the deck with margin.
- 1-1/4 inch: standard new-construction roof, single layer of shingles over 7/16-1/2 inch OSB or plywood.
- 1-3/4 inch: roof-overs (nailing through an existing layer of shingles) or thicker decking/sheathing stacks.
- 2 inch or longer: double layer tear-off decks, or where furring/strapping sits under the deck.
- Ring-shank nails: recommended in high-wind zones and for any roof-over application, since they resist pull-through and back-out better than smooth shank.
Hip and ridge cap nail counts
Hip and ridge cap shingles are nailed separately from the field and are not included in the per-square field counts above. Standard practice is 2 nails per cap piece, with caps spaced to give roughly 5 inches of exposure, yielding about 20-21 cap pieces per 20 linear feet of ridge/hip (using a 12-inch cap width cut from a 3-tab shingle, 3 caps per shingle, 1 bundle covering about 33-35 linear feet).
For a house with 60 linear feet of ridge and 40 linear feet of hips (100 total linear feet), at roughly 2.4 cap pieces per linear foot (5-inch exposure), that's about 240 cap pieces and 480 additional nails — add these on top of, not blended into, the field nail order.
Run the numbers
- Roofing Nails CalculatorEstimate roofing nails or screws by weight and count for shingles, metal panels and underlayment. Supports 4-nail and 6-nail patterns.
- Roof Shingle CalculatorWork out how many shingle bundles and squares your roof needs. Includes waste allowance, starter strip, ridge cap and nail quantities for asphalt shingles.
- Snow Load CalculatorCalculate flat and sloped roof snow load from ground snow load using the ASCE 7 method, including exposure, thermal and importance factors and total roof load.
Frequently asked questions
How many roofing nails do I need per square?
About 320 nails per square (100 sq ft) using the standard 4-nails-per-shingle pattern. That rises to 480 nails per square in high-wind zones requiring 6 nails per shingle under IRC Table R905.2.6.1.
How many coil nails are in a box, and how many squares does that cover?
Common coil nail box sizes are 3,600, 4,500 and 7,200 nails. A 7,200-count box covers about 22.5 squares at 4 nails per shingle, or about 15 squares at 6 nails per shingle.
How many nails are in a bundle of shingles?
At the standard 4-nails-per-shingle rate, a bundle covering roughly 1/3 of a square (about 26-27 shingles) needs about 104-108 nails. This scales with the fastening pattern: 5 or 6 nails per shingle raises it to roughly 130-160 nails per bundle.
How many pounds of roofing nails do I need per square?
About 2.5 to 2.8 lb per square using standard 1-1/4 inch smooth shank nails at 4 nails per shingle (roughly 125 nails per pound). Ring-shank nails and 6-nail patterns push this closer to 4 lb per square.
Do I need 4 or 6 nails per shingle?
IRC 2021 requires 6 nails per shingle where the basic wind speed is 110 mph or higher (Table R905.2.6.1); below that it's 4 nails per shingle minimum. Many shingle manufacturers also require 6 nails to validate high-wind warranty coverage regardless of the code map, so check both.
What size roofing nail should I use?
1-1/4 inch nails are standard for new construction over 7/16-1/2 inch OSB or plywood with a single shingle layer. Use 1-3/4 inch or longer for roof-overs, double-layer tear-offs, or thicker deck/furring stacks, and always ensure at least 3/4 inch penetration into solid wood decking.
How many nails do ridge cap shingles need?
2 nails per cap shingle piece, spaced to the manufacturer's exposure (commonly 5 inches), which works out to roughly 2.4 cap pieces and 4.8 nails per linear foot of ridge or hip — ordered separately from field shingle nails.
Keep reading
- Roofing Squares and Shingle Bundles: How Many You NeedThe estimating unit every roofer quotes in — plus the starter strip, hip and ridge cap, underlayment and nail quantities that never appear in the headline square count.
- How to Read a Roofing Estimate: Line Items, Pricing and Red FlagsTwo quotes for the same roof can differ by thousands of dollars because they cover different scopes, not because one contractor is cheaper. Here is how to decode every line item, spot allowances hiding future change orders, and compare bids apples-to-apples.
- Purlin Spacing for Metal Roofs: Chart, Spans and Gauge GuideHow far apart purlins can go before a metal roof panel oil-cans, sags, or fails a snow load check — with gauge-specific spacing and a purlin-count formula.
Last updated 2026-10-08. Guidance is general information for planning and is not a substitute for a licensed engineer or local code review.