Free roofing tool

Roofing nails calculator

Find how many roofing nails — and how many pounds — your roof needs.

Enter your roof area to see how many roofing nails to buy and about how many pounds that is, at your chosen nails-per-square.

Roof area (sq ft) Nails per square Use ~320 for standard 4-nail pattern, ~480 for 6-nail high-wind pattern.

Nails needed

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High-wind and steep roofs use more nails per shingle — check your shingle’s spec.

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How many roofing nails you need

Standard 3-tab and architectural shingles use a 4-nail pattern — about 320 nails per square (100 sq ft). High-wind zones and steep roofs use a 6-nail pattern, around 480 per square. Roughly 140 coil nails (1¼") weigh a pound, so a full roof usually needs several pounds plus a bit extra.

Cost ranges reflect 2026 U.S. installed prices (BLS producer/labor data, Remodeling Cost vs. Value, and manufacturer pricing). Your real price depends on your roof, region, and pro — see the full cost guide.

FAQ

Roofing Nails Calculator questions

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How many nails per square of shingles?

About 320 nails per square with the standard 4-nail pattern, or roughly 480 with the 6-nail high-wind pattern.

How many nails come in a pound?

Roughly 140 nails per pound for common 1¼" coil roofing nails. Longer nails weigh more, so you get fewer per pound.

What size nails for roofing?

Most asphalt shingle jobs use 1¼" nails over a single layer; go longer (1½"–2") over an existing layer or thick decking so the nail bites at least ¾" into the wood.

When do I need the 6-nail pattern?

In high-wind regions, on steep slopes, and per many manufacturer warranties. Using six nails per shingle boosts wind resistance and is often required to keep the warranty valid.

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