Materials, layout and cost without guesswork

Plan your deck before buying materials

Plan boards, pavers, joists, pedestals, slope, fasteners, cuts and deck cost. Save and compare options locally.

Tools for the whole process

Calculate area, rows, linear metres, stock boards, waste and the last rip for a rectangle or L-shaped deck.

Choose a full-board count and even gap to avoid a narrow rip at the deck edge.

Calculate joist count, length, total linear metres and actual on-centre spacing for a rectangular deck.

Calculate the paver grid and an estimated corner pedestal count for a raised terrace.

Calculate full pavers, spare pieces and edge cut dimensions for a rectangular terrace.

Convert slope percentage into a height difference in millimetres and centimetres over a given distance.

Estimate clips or screws with spare allowance from board rows and joist count.

Check segments per row, stock board count and waste for a selected stock length.

Add up boards, joists, fasteners, pedestals, pavers, fascia and other items with a contingency.

Calculate exposed edge length, fascia board count, corners and offcut.

Dimensions and projects remain in your browser.

Save layout directions, lengths and prices, then view them side by side.

Presets are a starting point, not a universal installation standard.