Decking Calculator
Use this decking calculator to estimate deck area, board count, and total linear metres from your deck dimensions.
What This Calculator Does
This calculator estimates the number of decking boards needed based on deck size, board width, and board gap. It is helpful when pricing materials or checking quantities before ordering.
How to Use
- Enter deck length.
- Enter deck width.
- Adjust board width if needed.
- Click calculate to estimate board quantities.
Example
For a 6m by 4m deck with 140mm boards and a 5mm gap, the calculator estimates deck area and the number of boards required.
Why This Calculation Matters
Decking jobs can get expensive fast if quantities are off. A quick material check helps with pricing, ordering, and avoiding waste or last-minute supply runs.
Common Mistakes
- Not allowing enough waste or offcuts.
- Using the wrong board width.
- Ignoring board spacing.
- Measuring rough site dimensions instead of finished deck size.
FAQs
Does this include waste?
No, not by default. Many builders still allow extra material for cuts and site variation.
Can I change board width?
Yes. Enter the board width that matches your chosen material.
Why use a decking calculator?
It speeds up quoting and reduces errors when ordering boards.