Plan your deck project with accurate board counts and material estimates.
Add 10% waste for cuts and defects.
Pressure-treated 5/4×6 decking is the most common choice.
Use this calculator at the planning stage of any construction or renovation project — before purchasing materials. Ordering the right quantity upfront avoids both costly mid-project shortages and unnecessary waste.
A common error is measuring irregular rooms or surfaces as simple rectangles. Recesses, alcoves, and non-right-angle corners require either decomposing the area into simpler shapes or using actual measured dimensions rather than approximations.
A builder quotes materials for a 120m² interior plastering job. The calculator estimates the plaster bags required at standard coverage rates, producing a materials list that prevents mid-project shortages and avoids the costly delays that result from underordering.
A 12×16 deck = 192 sq ft. Using 5.5-inch boards + spacing: approx. 28–30 boards at 16 ft.
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