Decking Calculator
Estimate total linear metres of decking boards needed from the deck area, board face width and a waste allowance.
Estimated result—
How it works
Linear metres ≈ deck area ÷ board width in metres, then add the selected waste percentage.
Example
A 30 m² deck using 90 mm boards needs about 333 linear metres before waste, or about 367 m with 10% added.
Useful things to know
- This simple estimate does not deduct board gaps.
- Board lengths, joins, direction and pattern affect actual waste.
- Check the board’s installed cover width rather than nominal width where relevant.
About this estimate
HandyNumbers calculations run in your browser. Results are general estimates and can differ from real-world outcomes because of fees, taxes, tariffs, product specifications, rounding and individual circumstances.