How many roofing nails per square?
A standard asphalt shingle roof needs about 320 roofing nails per square when you drive four nails per shingle, and about 480 nails per square when a six-nail high-wind pattern is used. A square covers 100 square feet of roof. Those two numbers are the ones to plan around, but the real count shifts with shingle type, because architectural shingles cover more area each and use fewer pieces per square.
The 320 figure comes from roughly 80 three-tab shingles in a square at four nails apiece. Move to a six-nail pattern and the same square jumps to 480. Architectural (laminate) shingles run near 64 pieces per square, so their counts land lower even at the same nails-per-shingle. The table below breaks it down so you can pull the exact row for your job.
Nails per square by shingle type and nail pattern
Nail count per square depends on two things: how many shingles fill a square, and how many nails go in each shingle. Three-tab shingles pack about 80 pieces per square; architectural shingles about 64. Multiply pieces by the nail pattern to get the count. These are working figures for a 100 square foot square before waste.
| Shingle type | Shingles per square | 4-nail pattern | 6-nail pattern |
|---|---|---|---|
| Three-tab | ~80 | 320 nails | 480 nails |
| Architectural / laminate | ~64 | ~256 nails | ~384 nails |
| Heavy designer / luxury | ~57 to 64 | ~230 to 256 nails | ~345 to 384 nails |
Add a small allowance for the starter and first course, where many manufacturers spec an extra fastener. In practice, round up and order for the six-nail count if there is any chance an inspector or warranty calls for it. Nails are cheap relative to a callback.
Why the count changes: four nails versus six
Four nails per shingle is the baseline for standard installs, and six nails is the enhanced high-wind pattern. The jump from four to six adds two fasteners across the nail line, shrinking the unsupported span between nails and raising the shingle’s resistance to wind uplift. That is why the per-square count climbs from 320 to 480 on three-tab.
Six nails is often required, not optional. The International Residential Code (IRC R905.2.6) defers to the manufacturer’s printed instructions, and most shingle lines require six fasteners where the basic design wind speed runs high (commonly around 110 to 120 mph and above), on steeper slopes, and to qualify for the enhanced wind warranty. Requirements vary by jurisdiction and by product, so confirm against the wrapper and local code before you buy.
Manufacturers also specify placement in the nail zone. Fasteners set too high (above the common bond line) or overdriven can void the wind warranty even when the count is correct. Count and placement both matter.
Nails per shingle, per bundle, and the first course
Each field shingle takes four nails in a standard install and six in a high-wind install. A bundle of three-tab holds about 26 shingles, so it needs roughly 104 nails at four per shingle or 156 at six. An architectural bundle of about 21 pieces needs roughly 84 nails at four, or 126 at six.
The first (starter) course is the exception worth planning for. Many manufacturers call for an extra nail per shingle along the eave and rake to lock down the most wind-exposed row. On a typical roof that adds only a small handful of nails per square, but it is a real spec, not a rounding error, on the edges where uplift starts.
How many boxes or pounds of nails to buy
Buy by the square, then convert to boxes or pounds. A 7,200-count box of 1-1/4 inch electro-galvanized coil roofing nails covers about 22 squares at a four-nail pattern and about 15 squares at six nails. By weight, plan on roughly 1.5 to 2 pounds of nails per square in a four-nail pattern and closer to 2.5 pounds at six nails.
- Get your roof area in squares. Divide total roof area by 100. A 2,500 square foot roof is 25 squares. Use your measured roof area, not the house footprint, because pitch adds area.
- Pick the nail count per square. Use the table above for your shingle type and pattern. Architectural at six nails is about 384 per square.
- Multiply. 25 squares times 384 nails is 9,600 nails for the field.
- Convert to boxes. At six nails, one 7,200-count box covers about 15 squares, so 25 squares needs about 1.7 boxes. Order 2 boxes.
- Add 10 to 15 percent for waste, jams, misfires, and the extra starter-course nails. A partial second box covers this without a mid-job supply run.
For a three-tab roof at four nails, the same 25 squares is 8,000 nails, roughly one and a fraction 7,200-count boxes, so still order two. Coil nailers empty fast, and running short a half square from the ridge is the worst time to stop.
Why the numbers you see online disagree
Search results throw out 320, 348, 480, and 522 nails per square for the same question, and the spread confuses people. The differences trace back to three assumptions each source folds in silently: the shingle count per square, whether the first course extra nail is included, and how much waste is baked in.
The clean baseline is 320 at four nails and 480 at six for three-tab, using 80 shingles per square with no padding. Figures like 348 or 522 add a first-course allowance and a small waste factor on top. Neither is wrong; they answer slightly different questions. For ordering, start from the clean count in the table, then apply your own waste percentage so you can see exactly what you are padding.
The bigger miss in most guides is treating every shingle as three-tab. Architectural shingles dominate new installs and use fewer pieces per square, so a blanket 320 or 480 overcounts them by 15 to 20 percent. Match the count to the shingle actually going on the roof and the estimate holds.
For the fasteners themselves, see our companion guide on roofing nail sizes, types, and code requirements. To confirm the unit behind every count here, read how big a roofing square is, and to size the shingles themselves use our guide to estimating shingle bundles. When it is time to drive them, our coil roofing nailer setup guide covers depth and pressure. More fundamentals live in the Learn About Roofing hub.
Frequently asked questions
How many nails per shingle?
Four nails per shingle is the standard for most asphalt roofs, and six nails per shingle is the high-wind pattern. Six is commonly required where design wind speeds run high, on steeper pitches, and to earn the enhanced wind warranty. The manufacturer’s printed instructions on the wrapper set the requirement, and local code may raise it.
How many nails per square of shingles?
About 320 nails per square at four nails per shingle and about 480 at six, for three-tab shingles using roughly 80 pieces per square. Architectural shingles run lower, near 256 at four nails and 384 at six, because they use about 64 pieces per square. Add a small allowance for the first course and waste.
How many pounds of nails per square?
Plan on roughly 1.5 to 2 pounds of roofing nails per square in a four-nail pattern and closer to 2.5 pounds at six nails, using 1-1/4 inch nails. Longer nails weigh more per piece, so heavier or thicker shingles that need 1-3/4 inch nails push the weight up. Order by count first, then confirm weight for shipping.
How many squares does a box of coil nails cover?
A 7,200-count box of 1-1/4 inch coil roofing nails covers about 22 squares at a four-nail pattern and about 15 squares at six nails. Divide your roof area in squares by that coverage to get boxes, then round up and add a partial box for waste and the starter course.
Is four or six nails required by code?
It depends on the product and jurisdiction. The IRC (R905.2.6) points to the manufacturer’s instructions, and most shingle lines require six fasteners in high-wind regions, on steep slopes, or to validate the enhanced wind warranty. In lower-wind areas four may be allowed. Confirm against the shingle wrapper and your local building department before installing.
How many nails are in a bundle of shingles?
At four nails per shingle, a three-tab bundle of about 26 pieces needs roughly 104 nails, and an architectural bundle of about 21 pieces needs roughly 84. At six nails those rise to about 156 and 126. Three bundles make one square, so the per-square totals scale directly from the bundle count.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.