Decking Calculator

Please use our calculator below to help you estimate how many decking boards and joists you will need to create your deck

Please get in touch with your local branch if you have any questions.
Oxford 01865 326500, Swindon 01793 484455 or Yarnton 01865 842574

Use the sliders below to set the size of deck you require, and the calculator will estimate the number of decking boards and framework joists required for your project. Material quantity calculations are approximate and based on using full lengths of decking boards, measuring 4200x125mm (LxW), with a 5mm gap between each board when installed

Width (m)

Length (m)

Decking Area (m2)