How Many Roofing Nails Per Square? Quick Calculator
Updated April 2026 · 5 min read
Buy too few coils and you're sending someone back to the supply house mid-roof. Buy too many and you're storing leftover boxes for the next decade. Here's the actual nail count per square for every common nailing pattern, plus a simple formula to plan any size roof.
The short answer
- 4-nail standard pattern: ~320 nails per square (100 sq ft)
- 6-nail high-wind pattern: ~480 nails per square
- Add 10% waste for misfires, jams, and the inevitable dropped handful
Where the numbers come from
A square of asphalt shingles is 100 square feet of finished roof. That works out to about 80 shingles for both 3-tab and architectural styles (each shingle covers ~1.25 sq ft of exposed area).
Multiply 80 shingles by your nail pattern: 80 × 4 = 320 for the standard pattern, 80 × 6 = 480 for the high-wind pattern. Simple math, but easy to forget when you're standing in front of a wall of nail boxes at the supply house.
4-nail vs 6-nail: which one do you need?
The 6-nail pattern is required wherever the design wind speed exceeds 110 mph — basically all of coastal Florida, the Gulf Coast, and large parts of the East Coast. It's also required by most architectural shingle warranties regardless of location, so check the wrapper before you load the coil.
For everywhere else, the 4-nail pattern (one nail at each end and one above each cutout) is code-minimum and what 90% of inland roofs use. Read the full breakdown in our nails per shingle guide if you want the IRC chapter and verse.
Quick math for any roof size
- Get the total roof area in square feet (length × width × pitch factor for both planes).
- Divide by 100 to get squares.
- Multiply by 320 (4-nail) or 480 (6-nail).
- Add 10% for waste.
Example: a 2,400 sq ft roof = 24 squares × 480 nails = 11,520 nails for a 6-nail high-wind install. Add 10% and round up to ~13,000. That's about two full 7,200-nail boxes — easy to grab without overbuying.
How many coils per box, and how many boxes per roof
A standard contractor box of coil roofing nails holds 7,200 nails (60 coils of 120 each). One box covers about 22 squares of 4-nail roof or 15 squares of 6-nail roof. For a typical 20-square residential re-roof, plan one box minimum, two boxes if you're going 6-nail.
Stock up on the right length and material on our coil roofing nails page — galvanized for inland jobs, stainless if you're near saltwater.