Finished board face width.
Board gap, direction and cost
Optional. No currency conversion is applied.
Result updated. Decking boards needed: 58 boards.
Result summary
Decking estimate
Main project estimate from the values entered.
58 boards
This is a planning estimate for board count, waste and optional material cost.
Key numbers
- Total boards
- 58 boards
- Estimated cost
- Not estimated
Key takeaway
This estimate suggests about 58 boards for the selected deck size and board dimensions, including 10% waste.
Project details
Decking details
- Deck area
- 192 sq ft
- Board rows
- 26
- Boards per row
- 2
- Estimated cost
- Not estimated
- Effective board width
- 0.469 ft
- Boards before waste
- 52
- Total boards
- 58 boards
Check these assumptions
- Framing, fasteners, rails, stairs, footings and structural requirements are not included.
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How this decking calculator works
The calculator converts board width and gap into the deck unit, estimates rows and boards per row from the deck dimensions, then adds the selected waste allowance.
Assumptions
Board count is rounded up to whole boards. The estimate covers decking boards only and does not include framing, fasteners, rails, stairs or structural requirements.
What this calculator does not include
This calculator does not provide structural engineering, span tables, footing design, railing or stair design, code compliance or permit advice.
Key terms and assumptionsShort notes about board direction, board gap, waste allowance and scope limits.
- Board direction
- The board direction controls which deck dimension is used for run length and which is used for row count.
- Board gap
- The board gap is added to board face width to estimate how many rows fit across the deck.
- Waste allowance
- Waste allowance adds extra boards for cuts, joins and defects.
- Decking only
- Framing, fasteners, rails, stairs, footings and structural requirements are not included.
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FAQs
How does the decking calculator estimate boards?
It estimates board rows and boards per row from deck and board dimensions, then adds the selected waste allowance.
Does board gap affect the estimate?
Yes. The gap changes the effective board width used for the row count.
Does this include joists or framing?
No. It estimates decking boards only, not framing, footings, rails, stairs or fasteners.
Can I use metric dimensions?
Yes. Metric mode uses metres for deck and board length, and millimetres for board width and gap.
Why add waste?
Waste helps account for cuts, joins, damaged boards and layout uncertainty.
Is this structural advice?
No. It is a general material estimate only and does not provide engineering, permit or code advice.