Planning a new deck? Use our free Deck Timber Calculator to work out exactly how much decking you need before you buy. Simply enter your deck's length and width, choose your preferred board size and gap spacing, and get an instant estimate of the total linear metres, number of boards, and rows required — including a configurable waste allowance so you order enough timber the first time.
Decking boards estimator — metric
Whether you're building a small balcony or a large entertaining area, this tool takes the guesswork out of your decking project and helps you avoid costly under-ordering or wasteful over-buying. Select your board width, board length, laying direction, and gap size to see a detailed breakdown tailored to your exact specifications.