Decking Calculator

Use our decking calculator to work out how many boards, joists, and fixings you need for your project. Simply enter your deck dimensions below and select your products to get an instant quote.

Enter Your Deck Dimensions

Deck Length (metres)

Deck Width (metres)

Board Direction

Deck Height from Ground (mm)

Total Deck Area: 12.0 m²

Choose Your Deck Boards

Apex Composite Deckboard 24x140mm 4800mm – Amarillo Oak

£68.45 each

Apex Composite Deckboard 24x140mm 4800mm – Silver Birch

£68.45 each

Apex Composite Deckboard 24x140mm 4800mm – Thermo Ash

£68.45 each

HD Deck 3D 25x146mm 3600mm – Black Oak

£40.70 each

HD Deck 3D 25x146mm 3600mm – Burnished Oak

£40.70 each

HD Deck 3D 25x146mm 3600mm – Golden Oak

£40.70 each

HD Deck 3D 25x146mm 3600mm – Weathered Oak

£40.70 each

HD Deck Dual 22.5x143mm 3600mm – Antique/Carbon

£32.85 each

HD Deck Dual 22.5x143mm 3600mm – Natural Oak/Slate

£32.85 each

HD Deck Dual 22.5x143mm 3600mm – Oak/Walnut

£32.85 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Antique

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Carbon

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Natural Oak

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Oak

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Slate

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Walnut

£69.95 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Antique

£21.60 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Carbon

£21.60 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Natural Oak

£21.60 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Oak

£21.60 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Slate

£21.60 each

HD Deck Dual End Cap 22.5x143mm Pack 20 – Walnut

£21.60 each

HD Deck Pro 23x200mm Oyster/Champagne 3600mm

£72.45 each

HD Deck Pro Bullnose Board 22.5x150mm Oyster 3600mm

£74.35 each

HD Deck XS 25x146mm 3600mm – Lava

£34.65 each

HD Deck XS 25x146mm 3600mm – Silver

£34.65 each

HD Deck XS 25x146mm 3600mm – Walnut

£34.65 each

HD Deck XS End Cap 25x146mm Pack 20 – Lava

£21.60 each

HD Deck XS End Cap 25x146mm Pack 20 – Silver

£21.60 each

HD Deck XS End Cap 25x146mm Pack 20 – Walnut

£21.60 each

Infinity Composite Deckboard 20x140mm 4800mm – Caribbean Coral

£47.85 each

Infinity Composite Deckboard 20x140mm 4800mm – Indonesian Teak

£47.85 each

Infinity Composite Deckboard 20x140mm 4800mm – Mossel Bay

£47.85 each

Infinity Composite Deckboard 20x140mm 4800mm – Tiger Cove

£47.85 each

Infinity SE Composite Deckboard 20x140mm 4800mm – Caribbean Coral

£47.85 each

Infinity SE Composite Deckboard 20x140mm 4800mm – Indonesian Teak

£47.85 each

Infinity SE Composite Deckboard 20x140mm 4800mm – Mossel Bay

£47.85 each

Infinity SE Composite Deckboard 20x140mm 4800mm – Tiger Cove

£47.85 each

Millboard Enhanced Grain 3600mm x 176mm x 32mm – Coppered Oak

£47.75 each

Millboard Enhanced Grain 3600mm x 176mm x 32mm – Golden Oak

£47.75 each

Millboard Enhanced Grain 3600mm x 176mm x 32mm – Jarrah

£47.75 each

Millboard Enhanced Grain 3600mm x 176mm x 32mm – Limed Oak

£47.75 each

Millboard Enhanced Grain 3600mm x 176mm x 32mm – Smoked Oak

£47.75 each

Treated 28x145mm Redwood Deckboard – 3600mm

£8.65 each

Treated 28x145mm Redwood Deckboard – 4800mm

£8.65 each

Treated 28x145mm Redwood Deckboard – 5400mm

£8.65 each

Treated 28x145mm Redwood Deckboard – 6000mm

£8.65 each

Choose Joist Timber

Joist Spacing

Treated Carcassing Unseasoned 47x100mm – 3600mm

£7.40 each

Treated Carcassing Unseasoned 47x100mm – 4800mm

£7.40 each

Treated Carcassing Unseasoned 47x150mm – 3600mm

£11.10 each

Treated Carcassing Unseasoned 47x150mm – 4800mm

£11.10 each

Choose Fixings

Composite Prime Fixing Clip and Screws Pack 200

£72.50 per pack

Decking Screw Green 4.5x50mm Box 200

£8.50 per pack

Decking Screw Green 4.5x55mm Tub 1000

£36.35 per pack

Decking Screw Green 4.5x60mm Box 200

£9.55 per pack

Decking Screw Green 4.5x75mm Box 200

£12.40 per pack

Edge Trim / Fascia (Optional)

Which sides need fascia?

Click to deselect any side that is built against a wall, fence, or other structure.

DECK

Total fascia edge: 14.0m — all 4 sides selected

No Fascia Required

Skip this step

HD Deck 3D Fascia 11x74mm 3600mm – Black Oak

£17.70 each

HD Deck 3D Fascia 11x74mm 3600mm – Burnished Oak

£17.70 each

HD Deck 3D Fascia 11x74mm 3600mm – Golden Oak

£17.70 each

HD Deck 3D Fascia 11x74mm 3600mm – Weathered Oak

£17.70 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Antique

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Carbon

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Natural Oak

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Oak

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Slate

£69.95 each

HD Deck Dual Bullnose 22.5x150mm 3600mm – Walnut

£69.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Antique

£39.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Carbon

£39.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Natural Oak

£39.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Oak

£39.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Slate

£39.95 each

HD Deck Dual Fascia 11x150mm 3600mm – Walnut

£39.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Antique

£19.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Carbon

£19.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Natural Oak

£19.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Oak

£19.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Slate

£19.95 each

HD Deck Dual Fascia 11x72mm 3600mm – Walnut

£19.95 each

HD Deck Pro Bullnose Board 22.5x150mm Oyster 3600mm

£74.35 each

HD Deck Pro Fascia Board 11x150mm 3600mm – Champagne

£44.70 each

HD Deck Pro Fascia Board 11x150mm 3600mm – Oyster

£44.70 each

HD Deck XS Fascia 74x11mm 3600mm – Lava

£17.05 each

HD Deck XS Fascia 74x11mm 3600mm – Silver

£17.05 each

HD Deck XS Fascia 74x11mm 3600mm – Walnut

£17.05 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Carbonised

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Coppered Oak

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Golden Oak

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Jarrah

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Limed Oak

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Smoked/Driftwood

£33.35 each

Millboard Bullnose Edging Standard 3200mm x 50mm x 32mm – Vintage Oak

£33.35 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Carbonised

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Coppered Oak

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Golden Oak

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Jarrah

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Limed Oak

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Smoked/Driftwood

£38.00 each

Millboard Fascia Board 3200mm x 146mm x 16mm – Vintage Oak

£38.00 each

Handrail / Balustrade (Optional)

Does your deck need a handrail? Recommended above 200mm, legally required above 600mm.

Which sides need a handrail?

Click to deselect any side that does not need a rail.

DECK

Total rail edge: 14.0m — all 4 sides

Estimated: — posts | — balusters

Select Handrail Type

Benchmark Pine Handrail 56x59x2400mm Grooved 41mm PEFC

£31.50 each

Benchmark Pine Handrail 56x59x3600mm Grooved 41mm PEFC

£37.45 each

Benchmark Pine Handrail 56x59x4200mm Grooved 41mm PEFC

£44.75 each

Treated Decking Chunky Handrail 45x120mm

£4.05 each

Treated Decking Handrail 44x68mm

£11.25 each

Select Post / Newel Type

Benchmark Pine Patrice Spigot Newel Post 850x91x91mm

£21.40 each

Benchmark Pine Stop Chamfered Spigot Newel Post 850x91x91mm

£31.85 each

Colonial Newel Post 82x82x1250mm

£12.50 each

Patrice Newel Post 82x82x1250mm

£12.40 each

Treated Deckpost 90x90mm

£11.45 each

Select Balusters (Optional)

No Balusters

Skip balusters

Stop Chamfered Baluster 900x41x41mm

£2.15 each

Deck Steps (Optional)

Do you need steps up to your deck? Their number is estimated from the deck height you entered above.

Calculate Your Requirements

Wastage Allowance