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

Deck Length
Deck Width

Stump Width
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Enter Stump Height from ground level.
Stump Height + Bearer Depth + Joist Depth + Board Thickness = Total Deck Height above ground level.
Adjust stump height in results if stumps cast into footing.
Stump Height
Stump Centers
Stump Set In
 
Footing Diameter
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Footing dimensions used to calculate concrete volume. Assumes Stumps sit on top of footings at ground level - fixed with stirrups cast into concrete footings.
Footing Depth

Board Width
Board Thickness
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Gaps adjusted to fit full width boards, equal to or nearest larger than entered Gap.
For exact gap see Board Fit Options
Board Gap
Centers Adjusted to Fit Evenly Centers Adjusted to Fit Evenly
Bearer Thickness
Bearer Depth
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Requires longer stumps to maintain deck height
(Stumps Notched)
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Bearer Set In = Joist Overhang from OUTSIDE of bearer to end of joist (edge of deck)
Bearer Setin Inner
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From OUTSIDE of bearer to end of joist (edge of deck)
Bearer Setin Outer
Bearer Centers

Joist Thickness
Joist Depth
Joist Centers
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Joist Set In allows Deck Board Overhang at each end of deck
End Joist Set In

Ground Fall in Width
 
Deck Material List and Cost Calculator Material List and Costs





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Total Deck Height  
Stump base (ground level) to board top

Deck Area =

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Use correct diagonal to square deck.
When both diagonals = deck is square.
Diagonal to Square Deck =

Jump To
↓ Stumps   ↓ Bearers   ↓ Joists   ↓ Boards

Scale

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

... Enter Linear Costs




Stumps Top ↑



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

Deck Stumps and Beareres diagram


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

Fall in Width

Deck Stumps and Joists diagram


Bearers Top ↑



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

Deck Bearers diagram



Joists Top ↑



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

Deck Joists diagram


Deck Boards Top ↑



Mark Every Boards.  

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

Deck Joists and Boards diagram

Tips for Laying Deck Boards Read this Forum Thread about Tips for Laying Deck Boards

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
Connections:



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.





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Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
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Inch or Metric? 👈
The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm)
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