指南Landscaping
Landscaping · Practical guide

如何使用 Decking Calculator — calculate decking boards and waste

Plan board quantity from deck dimensions, board width, gaps, stock lengths and cutting allowance before preparing a final layout.

Checked 29 August 2026Clear inputs and assumptionsWorks on mobile
Method

Boards across the deck are based on board width plus gap. Linear requirement then depends on the board direction and available stock lengths.

Plan board quantity from deck dimensions, board width, gaps, stock lengths and cutting allowance before preparing a final layout. The linked Sellible tool keeps the fields, units and output together so the assumptions can be reviewed before the result is used.

  1. 1

    Choose the board direction before measuring runs.

  2. 2

    Enter actual board face width and designed gap.

  3. 3

    Apply waste after considering stock lengths and joins.

Worked example

Example values and result

These values demonstrate the method; replace them with measurements, rates or file details that match the real task.

Deck
5 m × 3 m
Board face
140 mm
Gap
5 mm
Waste allowance
10%
What the result means

The board count changes when the board direction changes. The calculator supports quantity planning; a cutting layout should also consider joins, stagger and support positions.

Use Decking Calculator
Before you rely on it

准确性和实用说明

  • Confirm joist spacing and manufacturer fixing guidance.
  • Plan breaker boards, picture frames and stair details separately.
  • Check expansion gaps and board-batch availability.
Avoid these

Common mistakes

  • Using nominal rather than actual board width.
  • Ignoring the gap between boards.
  • Assuming total linear metres guarantees a workable cutting layout.
Straight answers

常见问题

Is Decking Calculator free?

Yes. This calculator or browser utility is free and does not use processing credits.

Can I use this guide and Decking Calculator on a phone?

Yes. The guide, inputs, results and calls to action are responsive and keyboard accessible on current phones, tablets and desktop browsers.

Should I order or make a decision from the estimate alone?

No. Confirm joist spacing and manufacturer fixing guidance. Plan breaker boards, picture frames and stair details separately. The calculation is a planning aid rather than professional or regulatory approval.

How should I check the result?

Keep the source values and units visible, compare the result with supplier or project information, and retain enough precision until the final purchasing or reporting step.