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Deck Calculator - Stumps, Bearers, Joists and Boards with Individual + Total Costs and Connections (fasteners)

Deck Material List and Cost Calculator Material List and Costs

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Deck Length
Deck Width

Stump Width
Stump Height
Stump Centers
Stump Set In
Footing Diameter
Footing Depth

Board Width
Board Thickness
Board Gap
Centers Adjusted to Fit Evenly Centers Adjusted to Fit Evenly
Bearer Thickness
Bearer Depth
(Stumps Notched)
Bearer Setin Inner
Bearer Setin Outer
Bearer Centers

Joist Thickness
Joist Depth
Joist Centers
End Joist Set In

Ground Fall in Width


Deck plan with full dimensions - Stumps, Bearers, Joists, Boards, Lumber Costs

... Enter Linear Costs

Correct diagonal to Square Deck =

Total Deck Height   (Stump base to board top)

Deck Area =


STUMP Running set-out points along Deck ~ along Bearer (to near side of each stump)

Deck Stumps and Beareres diagram

STUMP Running set-out points across Deck ~ along Joist from Inside (to near side of each stump)

Fall in Width

Deck Stumps and Joists diagram


BEARER Running set-out points, across Deck ~ along Joist from inner side
(to near side of each bearer)

Deck Bearers diagram


JOIST Running set-out points along Bearer (to near side of each joist)

Deck Joists diagram

Deck Boards

      Mark Every Boards.  

Tips for Laying Deck Boards Read this Forum Thread about Tips for Laying Deck Boards
See also: Deck and Floor Board Quantity and Spacing Calculator for more detailed floor board spacing and gap calculations.

BOARD Running set-out points. Select board multiples to set out board placement.

Deck Joists and Boards diagram

Enter Costs per Linear Foot and % waste
All dimensions are actual physical finished sizes.
Stumps + % Waste @ $ ft
Bearers + % Waste @ $ ft
Joists + % Waste @ $ ft
Boards + % Waste @ $ ft

Enter cost per linear foot and wastage % for Stumps, Bearers, Joists and Boards to Calculate individual and Total Costs. Linear feet and cost are auto updated when the deck is re-calculated, with individual costs for stumps, bearers and joists displayed in each section. Hit + and - buttons to open or close spacing, re-calculating the deck to find how different spacing options effect cost and materials.

Out of Square If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. If necessary, adjust number of deck boards to match in both calculations, and see if different board gaps at each end of deck are acceptable, compared to equal gaps and cutting the last board at an angle. Use the widest dimensions for linear quantities.

DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks

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Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.

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