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Carpentry · Free Calculator

Timber Decking Calculator

Estimate timber decking materials including boards, joists, posts, and fixings. Covers Merbau, treated pine, and composite decking options.

Enter Your Measurements
metres
metres
Results

Enter your measurements to see results

Pro Tips
  • Merbau is the most popular hardwood decking in Australia
  • Decks over 1m high typically need council approval and engineering
  • Allow 5mm gap between boards for drainage and expansion
  • Joist spacing: 450mm for 19mm boards, 600mm for 32mm boards
  • Always use stainless steel or galvanised fixings for outdoor use

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