Decking Calculator
Estimate decking boards, joists, and rough cost for simple rectangular deck builds.
Cluster hub
Decking Estimating
Estimate decking boards, joists, and rough cost for simple rectangular deck builds.
Outdoor timber1 calculatorsRelated guides included
Core calculators in this cluster
Use this hub to move between closely related calculators in the same topic family. The goal is to keep the estimating journey connected instead of forcing one page to do every job.
How to use this cluster
Start with the calculator that matches the material or buying format you actually need, then move into the related guides if you need more detail before buying.
What affects estimates most
Dimensions, depth or coverage assumptions, waste allowance, and pack or stock-length rounding are usually the biggest drivers of the final buying number.
Why these guides are useful
The extra guides in each cluster help explain common mistakes, waste allowances, and buying choices that a simple quantity figure cannot cover on its own.
Deck Board Calculator
Estimate deck boards from deck size, board width, and waste allowance.
Deck Joist Spacing Guide
See how joist spacing changes rough deck material estimates.
Decking Waste Guide
Understand where decking waste comes from and when to increase the allowance.
Timber vs Composite Decking Costs
Compare timber and composite decking from a quantity and cost perspective.