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Decking cost calculator

The calculator counts materials from your deck size, then multiplies by unit prices you enter or by dated prices we have verified. If a price is missing, the result is marked Partial and lists what is missing.

Updated 30 Oct 2026 Australia · prices in AUD

Decking cost calculator

Metric · AUD
Deck size
m
m
Boards run along
Boards
Choosing a product fills in its published size and any verified price.
mm
mm
mm
Use the gap your clips or the manufacturer specify.
%
5–10% for simple rectangles; more for angles.
Frame & fixings
mm
Use the maximum from your board’s installation guide. Commercial use often needs closer centres.
Prices (AUD, your quotes)

We do not fill in typical prices: Teosad only uses prices it has verified with a date and source. Enter quotes you have, or choose a product with a verified price.

Rectangular decks only. Split L-shapes into rectangles and add the results. Prices include GST only if your quotes do.

30boards of 5.4 m to order
20 m²deck area
  • Board rows29
  • Board run (each row)5 m
  • Linear metres of board145 m
  • Boards before waste27
  • Waste allowance (10%)+3
  • Joists at 400 mm centres14 × 4 m
  • Joist linear metres56 m
  • Hidden clips (estimate)≈ 406
Add pricesMissing: Decking boards, Joists, Hidden clips
How this was calculated
  1. rows = ceil((4,000 + 5) ÷ (137 + 5)) = 29
  2. linear metres = 29 × 5 = 145 m
  3. boards = ceil(145 × 1.1 ÷ 5.4) = 30
  4. joists = ceil(5,000 ÷ 400) + 1 = 14

Independent comparison. Teosad may earn a commission from some retailer links; this never changes the order or the numbers. Disclosure

Your quotes, not typical prices

Most Australian decking manufacturers do not publish prices; they quote or sell through stockists. The calculator therefore leaves the prices blank for you to fill in from your quotes:

  • Board price per board, lineal metre or m²
  • Joist price per metre
  • Fixings per 100
  • Supports and footings (total)
  • Labour per m², if you use an installer

If a required price is missing, the result is marked “Partial” and lists what is missing. Prices include GST only if your quotes do.

Boards you can pick in the calculator

11 products · specs from manufacturer pages · sorted A–Z, not by commission

Ekodeck · Composite boards

Ekodeck Designer Series

Width
Not published
Thickness
Not published
Lengths
Not published
Material
Composite with Durashell polymer coating; 20% recycled HDPE and 50% reclaimed timber (page also states over 80% recycled materials)
Warranty
25 years
Joist centres
max 450 mm source

Colours: Backbeach, Leatherwood, Ironwood, Riverbank Red

ekodeck.com.au
Ekodeck · Composite boards

Ekodeck Summit Series

Width
180 mm
Thickness
23 mm
Lengths
5.4 m
Material
Composite with Durashell coating
Warranty
See manufacturer
Joist centres
max 500 mm source

Colours: Fairhaven, Stirling

ekodeck.com.au
Futurewood · Composite boards

CleverDeck Xtreme

Width
138 mm
Thickness
23 mm
Lengths
5.4 m
Material
Co-extruded (capped) composite with protective polymer shell; BAL-29
Warranty
See manufacturer
Joist centres
max 450 mm source
futurewood.com.au
Millboard · Composite boards

Enhanced Grain 176mm

Width
176 mm
Thickness
32 mm
Lengths
3.6 m
Material
Polyurethane Resin & Mineral Composite (RMC), wood-free
Warranty
25 years

Colours: Limed Oak, Antique Oak, Smoked Oak, Coppered Oak, Golden Oak, Jarrah +4

millboard.com
ModWood · Composite boards

ModWood Marina

Width
137 mm
Thickness
32 mm
Lengths
4.2 m
Material
Composite made from recycled materials; Global GreenTag certified (per page)
Warranty
See manufacturer
Joist centres
max 600 mm source

Colours: Sahara, Black Bean, Jarrah, Silver Gum

modwood.com.au
ModWood · Composite boards

ModWood Natural Grain Collection (Deck Board 88x23 and Wide Deck Board 137x23)

Width
137 mm
Thickness
23 mm
Lengths
5.4 m
Material
Composite from recycled/reclaimed materials (page: >85% recycled content, reclaimed plantation pine waste)
Warranty
See manufacturer
Joist centres
max 450 mm source

Colours: Sahara, Black Bean, Jarrah, Silver Gum

modwood.com.au
ModWood · Composite boards

ModWood Xtreme Guard

Width
Not published
Thickness
Not published
Lengths
Not published
Material
Capped composite (capping on all 4 faces)
Warranty
25 years

Colours: Charwood, Fire Brick, Koko Brown, Magnetic Grey, Sandy Bay

modwood.com.au
NewTechWood · Composite boards

Avenue Decking (US92 deck board)

Width
138 mm
Thickness
29 mm
Lengths
4.88 m
Material
Capped composite ('Fully Capped ... Including Grooves'); polymer type not stated
Warranty
25 years
Joist centres
max 450 mm source

Colours: Antique, Teak, Walnut

newtechwood.com.au
NewTechWood · Composite boards

Coastal Decking (US54C groove-edge)

Width
210 mm
Thickness
23 mm
Lengths
4.88 m
Material
Fully capped composite, 'made from 95% recycled material'
Warranty
25 years
Joist centres
max 400 mm source

Colours: Beech, Antique, Teak, Aged Wood

newtechwood.com.au
NewTechWood · Composite boards

Soho Decking (US166R grooved / US163R edge)

Width
138 mm
Thickness
25 mm
Lengths
5.4 m
Material
Fully capped composite, 'made from 95% recycled materials'
Warranty
See manufacturer
Joist centres
max 450 mm source

Colours: Blonde Oak, Merbau, Grey Ironbark

newtechwood.com.au
NewTechWood · Composite boards

Terrace Decking (US49C groove-edge / US63C)

Width
138 mm
Thickness
25 mm
Lengths
5.4 m
Material
Fully capped composite, 'made from 95% recycled material'
Warranty
25 years
Joist centres
max 450 mm source

Colours: Antique, Blackbutt, Teak, Ipe, Silver Grey

newtechwood.com.au
Full specification table (all products, with sources)
ProductWidthThick.LengthsWarrantyCheckedSource
Ekodeck Ekodeck Designer Series—— —'Up-to 25 Years Warranty' (no residential/commercial split on official page)30 Oct 2026 ekodeck.com.au [2]
Ekodeck Ekodeck Summit Series18023 5,400Ekodeck's page says "up to 30 years"; the product manual mentions 20 or 30 years depending on the terms. Read the manual.30 Oct 2026 ekodeck.com.au [2] [3]
Futurewood CleverDeck Xtreme13823 5,400Comparison table shows '10 Year No Fuss Warranty' but column mapping to Xtreme unclear; not recorded as a number.30 Oct 2026 futurewood.com.au [2]
Millboard Enhanced Grain 176mm17632 3,60025 years residential, 10 years commercial (per AU product page)30 Oct 2026 millboard.com [2]
ModWood ModWood Marina13732 4,200ModWood quotes "7 to 10 years" with conditions we could not read.30 Oct 2026 modwood.com.au [2]
ModWood ModWood Natural Grain Collection (Deck Board 88x23 and Wide Deck Board 137x23)13723 5,400ModWood quotes "7 to 10 years" with conditions we could not read.30 Oct 2026 modwood.com.au [2] [3]
ModWood ModWood Xtreme Guard—— —25-year limited warranty for durability, fade & stain (conditions asterisked, not read)30 Oct 2026 modwood.com.au [2] [3] [4]
NewTechWood Avenue Decking (US92 deck board)13829 4,88025-year limited residential warranty; commercial span listed N/A30 Oct 2026 newtechwood.com.au [2]
NewTechWood Coastal Decking (US54C groove-edge)21023 4,88025-year residential warranty (commercial term not stated).30 Oct 2026 newtechwood.com.au
NewTechWood Soho Decking (US166R grooved / US163R edge)13825 5,400The Soho product page says 15 years; NewTechWood's ranges page says 25 years. Confirm with NewTechWood.30 Oct 2026 newtechwood.com.au [2]
NewTechWood Terrace Decking (US49C groove-edge / US63C)13825 5,400Page refers to 25-year warranty subject to installation guidelines, secret-fix clips and joist spacing.30 Oct 2026 newtechwood.com.au

“—” means the manufacturer page we checked did not publish the figure. We do not estimate missing specs. Prices per m² assume a 5 mm gap and the board’s listed length.

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Comparing like with like: boards with boards, frames with frames. A frame is structure; boards are the surface.
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