Nail / Screw Count Calculator

Fastener totals from sheet size and spacing.

Nail / Screw Count Calculator

Work out fasteners per sheet, board, or panel from the support spacing and fastener spacing. Sheet dimensions and spacing now use separate natural unit defaults for metric and imperial workflows.

Fastener Inputs

Measurement systemSystem

Sheet / panel unit

Spacing unit

Sheet / Space QuantityQty

Sheet / Area LengthLength

Sheet / Area WidthWidth

Joist / support spacingSupport spacing

Nail / screw spacing across each supportFastener spacing

Extra allowance (%)Waste %

Pack and price fields

Fasteners per box / pack

Price per box / pack

Fasteners already owned

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.

Fastener calculator FAQ

Should I calculate sheets first?
Usually yes. Work out the sheet or panel count first, then use that quantity here so the fastener estimate stays tied to the installed material count.

Does this replace manufacturer fastening schedules?
No. This is a planning calculator. Always confirm edge spacing, field spacing, and fastening rules against the product guidance and your installation requirements.

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