Decking Calculator
Fast material estimate for a rectangular deck. If you’re unsure about joins / layout, send the list to us on WhatsApp and we’ll sanity-check it before you order.
Step 1 — Deck size & height
This guide helps customers understand which side is length vs width.
Measure the longest side.
Measure the shorter side.
Raised decks may need extra structure. If unsure, WhatsApp the list and we’ll confirm.
This affects the recommended joist size.
Boss-approved way: customer picks waste %.
Prices shown are inc. VAT where available. Basket totals may change due to offers and delivery options.
Step 2 — How are you running the boards?
Pick the option you want — the calculator will choose the best mix of 3.6m / 4.8m / 5.4m boards for your span (then applies your waste allowance).
Step 3 — Fascia boards (optional)
Choose the sides you want to fascia. You can select multiple sides. Fascia uses extra deck boards and extra screws (we include an allowance).
Quick tip: If you’re unsure which side is which, WhatsApp the list and we’ll confirm before you order.
Step 4 — Frame + fixings
We recommend based on height/use — you can change it if you want.
Fixings includes decking screws + weed membrane. (You can still adjust quantities later.)
Calculated product list
Adjust quantities if needed, then add to basket or send to WhatsApp for a quick sanity check.
Prices shown are inc. VAT where available. Basket totals may change due to offers and delivery options (delivery not included in calculator).