Deck Fastener Calculator — Screws & Nails Needed

How the deck fastener calculator works

Rule of thumb: ~350 deck screws per 100 ft² of decking at 16 in on-center joists (2 screws per board per joist). Increase 20% for 12 in OC joists.

About 700 deck screws at 16 in OC, or roughly 2.5 lbs of #8 × 2.5 in screws.

Screws hold better long-term and won't pop. Use exterior-rated coated or stainless screws for pressure-treated lumber.

Drywall

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Fence

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Deck

Estimate deck boards, joists and screws for any size deck.

Board Foot

Estimate board feet for hardwood or dimensional lumber.

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