Nail / Screw Count Calculator

Estimate fasteners from panel size, support spacing, fastener spacing, quantity, and an optional planning allowance. The breakdown shows support lines and fasteners per support before it rounds a purchase quantity.

Fastener Inputs

Pack and price fields
Optional. Add a pack size and price to convert the allowance total into a store purchase estimate.
Example: a 2400 mm × 1200 mm sheet over 450 mm joists with nails every 200 mm gives 42 fasteners per sheet. If you then enter a 1000-fastener box size, the calculator can also round up the number of packs to buy.

Read the support grid, not just the panel area

This estimate starts with the lines a sheet or board crosses. Each support line receives a row of fasteners, so closer supports or closer fastener spacing changes the total even when the sheet size stays the same.

support ───────────────── • • • • • • • • support ─────────────────

What the calculator counts

support lines crossed × fasteners along each support × number of panels

It then applies your allowance and, when entered, rounds the shortfall to whole boxes or packs.

Field and edge fastening

Some products use different fastening rules at panel edges and in the field. This page models a regular support grid for planning; use the product fixing schedule to choose the actual edge spacing, field spacing, fastener type, and corrosion resistance.

Test the spacing before you buy

Change only one spacing value and watch the breakdown. That comparison is often more useful than guessing a pack size: halving fastener spacing can nearly double the count along each support line.

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