All Roofing Calculators

Free roof pitch calculator for Australian builds. Convert between roof angle in degrees, rise/run and rafter length. Get the slope factor for accurate on-slope area to AS 2050.

Estimate 2026 Australian roof repair cost by scope, material, age, height, access, council permits and skip — itemised from a single tile replacement through structural sarking work.

Free Australian roof tile and sheet calculator. Calculate Colorbond corrugated sheets, Klip-Lok standing seam, concrete tiles, terracotta tiles and shingles in pieces and pallets per m².

Estimate 2026 Australian tile roof installation cost by line item: concrete, terracotta, slate, or synthetic composite, with strip-out, sarking, AS 2050 battens, mortared or dry ridge, valley flashing, structural reinforcement, council consent and skip disposal. Real 2026 ARC and Master Builders contractor rates.

Estimate Australian gutter guard installation costs by length, guard type, access, cleaning and removal. See the model assumptions and compare written quotes.

Estimate Australian 2026 polycarbonate patio, pergola and carport roof cost (Suntuf, Laserlite 3000, Palram Sunglaze, Macrolux multi-wall) by area, sheet type, tint, glazing-bar length, batten subframe and storey. Sized to AS/NZS 4256.5, AS 1562.3 and AS/NZS 1170.2 wind zones.

Size stick-built common rafters to AS 1684.2/.3/.4 with snow load, count and 2026 timber prices in AUD. F7 / MGP10 catalogue.

Free roof area calculator for Australian projects. Get on-slope area in m², Colorbond sheet count, tile quantities and sarking rolls based on footprint and pitch in degrees. AS 2050 compliant.

Calculate top-up depth, batt count and material cost for ceiling insulation. NCC 2022 R5.0 climate-zone targets, glasswool, polyester, cellulose.

Estimate 2026 ceiling-insulation cost in AUD: material, labour and total installed price for glasswool batts, blown cellulose and Earthwool. NCC 2022 R5.0 climate-zone targets.

Build an illustrative gutter-cleaning budget in AUD from length, storeys, debris, access and optional services. See the model's fixed rate assumptions.

Estimate 2026 Australian gutter installation pricing per linear metre by profile, material, building height, and access. Itemised labour, materials, downpipes, leaf guards, and removal in AUD.

Calculate Australian eaves-gutter fall, gradient and per-metre drop using AS/NZS 3500.3 minimum 1:500 or a custom 1:N gradient. Bushfire-zone overflow guidance and Colorbond Quad / half-round profile context.

Free Australian roof area calculator. Compute surface area in square metres for gable, hip, skillion and L-shape roofs from footprint, pitch in degrees, and eaves overhang. Colorbond and tile-ready.

Estimate the full installed cost of a roof replacement in Australia in 2026: Colorbond steel, concrete tile, terracotta tile, slate, and zincalume — itemised by material, labour, strip-off, skip, and BCA compliance.

Estimate Australian 2026 roof inspection cost by roof size, inspection type (visual, drone, thermal, moisture, comprehensive), pitch, material (Colorbond, tile, metal), and storey — pre-sale, post-storm, and insurance claim reports.

Estimate 2026 Australian roof leak repair pricing in AUD — broken terracotta tiles, Colorbond fasteners, box-gutter and valley fixes — with itemised labour, materials, and emergency call-out fees.

Free Australian roof truss calculator. Size prefab trusses to AS 1684 and AS 4440. Member lengths, count and delivered cost in AUD across NSW, VIC, QLD, WA.

Compare 2026 Australian roofing costs across Colorbond, terracotta, concrete tile, zincalume and slate on the same job. Side-by-side installed cost in AUD, A$/m², service life and cost-per-year.

Estimate Australian 2026 chimney repair cost by line item: crown rebuild, repointing, brick replacement, above-roof rebuild, cowl, flue liner, water-repellent seal, damper. To AS 2918 / AS 3500 with 2026 AUD trade rates.

Estimate 2026 Australian corrugated metal roof installation cost by line item: Zincalume Custom Orb 0.42mm and 0.48mm, Colorbond Custom Orb 0.42mm and 0.48mm thick gauge, or polycarbonate corrugated, with strip-out, anticondensation sarking, ridge capping, barge capping, valley flashing, capped Tek screws, eaves drip, council consent and skip disposal. Real 2026 ARC and MBA rates per AS 1562.1 and AS 2050.

Size Australian eaves gutter from roof area, pitch and design rainfall intensity per AS/NZS 3500.3:2021. Quad, half-round, OG and high-front box profiles in Colorbond and Zincalume.

Estimate Colorbond and Zincalume roof sheet count, flashings, and installed cost in AUD. Trimdek, Klip-Lok, Custom Orb — sized to AS 1562 and AS 4040.

Calculate metal roof cost in AUD across Colorbond, Zincalume, standing-seam, aluminium, and zinc. Low/mid/high quote ranges with BlueScope and Lysaght 2026 pricing, AS 1562 compliant.

Estimate Australian 2026 skylight installation cost by size, type (fixed, openable, Solatube), glazing and roof material. Includes flashing, framing, plaster finish and 240V wiring.

Estimate Australian 2026 solar PV roof installation cost by system size, panel type, inverter, mounting and roof material. STC rebate (Small-scale Technology Certificates), battery storage and switchboard upgrade included.

Estimate Australian 2026 torch-on SBS / APP membrane and built-up bitumen cost by area, surfacing, drains and storey. Aligns with AS 4654.2 and ARC Code of Practice.

Estimate Australian 2026 dormer addition cost by style (skillion, gable, hipped, eyebrow), size, retrofit vs new-build, storey, and access — with window, plasterboard finish, DA / CDC fee, and crane line items.

Estimate 2026 Australian EPDM rubber-membrane roof cost by line item: 1.14/1.52/2.29 mm black or white EPDM, mechanically fixed, fully bonded, ballasted or self-adhered. Real 2026 ARC, MBA and AICA contractor rates per AS 4654.2 and NCC 2022 Vol Two.

Estimate Australian 2026 green roof / living roof installation cost per square metre by system (extensive succulent / native, semi-intensive, intensive, blue-green WSUD) and structural retrofit scope. Aligns with GRO-A Guidelines, AS 4654.2 and NCC 2022.

Estimate 2026 Australian PVC single-ply membrane roof cost by line item: 1.2/1.5/1.8/2.0 mm membrane, standard PVC, KEE-modified Sarnafil, fleece-back or FiberTite PVC-CPA, with PIR insulation, gypsum overlay, roof outlets, kitchen-exhaust grease stacks, strip-out, council consent and skip removal. Real 2026 ARC, AICA and MBA rates per AS 4654.2.

Get a 2026 Australian roof replacement cost band by Colorbond, concrete tile or terracotta — region, pitch, complexity, BAL rating — with insurance and finance scenarios in AUD.

Size eave and ridge ventilation per NCC 2022 F8.5 and AS 4200.1 — intake, exhaust, whirlybird and continuous vent counts in cm² and mm²/m.

Estimate 2026 Australian natural-slate roof installation cost by line item: Welsh, Spanish, Vermont, Brazilian, or synthetic slate, with strip-out, sarking foil, copper slate nails, AS 2050 batten, lead or zinc ridge, lead open valley, rafter sistering, snow guards, council consent, and skip disposal. Real 2026 ARC and MBA contractor rates.

Estimate 2026 Australian standing seam metal roof installation cost by line item: Colorbond Klip-Lok, Zincalume, aluminium, zinc, or copper, with strip-out, sarking foil, vented ridge capping, barge capping, valley flashing, snow rail, drip flashing, council consent and skip disposal. Real 2026 ARC and MBA contractor rates per AS 1562.1.

Estimate Australian 2026 ridge capping cost by linear metre, material (concrete or terracotta ridge tile, Colorbond cap, Lysaght standing seam), bedding (mortar vs flexible pointing) and storey. Sized to AS 2050 and NCC 2022 wind-region rates.

Estimate 2026 Australian bitumen shingle installation cost by line item: IKO Marathon 3-tab, IKO Cambridge architectural laminate, IKO Crowne Slate designer, or impact-rated Class 4. Strip-out, sarking foil, eaves and valley membrane, drip-edge, ridge cap, starter, deck repair, council consent, skip disposal. 2026 ARC and MBA contractor rates.

Estimate 2026 Australian clay terracotta roof tile installation cost by line item: Spanish/S-tile barrel, Mission, flat interlocking, Roman, or pantile profile, natural or glazed finish (Monier, Bristile, La Escandella), with strip-out, anticondensation sarking, AS 2050 battens, hip-and-ridge tiles, Colorbond valley, structural reinforcement, council consent and skip disposal. 2026 ARC / Master Builders rates.

Estimate Australian 2026 cost of flat and low-slope roof restoration coatings by area (m²), chemistry (silicone, acrylic, polyurethane, butyl, bitumen emulsion), DFT, prep, condition, and access — for Colorbond, BUR, single-ply, mod-bit, and concrete decks.

Free hip roof calculator for Australia. Compute roof area in m², rafter and hip rafter lengths, and ridge length for any equal-pitch hip roof — to AS 1684 and AS 2050.

Estimate 2026 Australian roof cleaning cost by area, soft wash vs high pressure, moss/lichen level, pitch and storey. Tailored for Colorbond, terracotta, Decramastic.

2026 Australian roof deck replacement cost by line item: OSB or F11/F14 structural plywood, hardwood T&G, Colorbond pan decking, strip-out, sarking foil, rafter sistering, fasteners, council consent, and skip disposal. Real 2026 contractor rates per AS 1684 and Master Builders guidance.

Free roof estimate calculator for Australia. Build a contractor-style quote with line-item costs, overheads, profit, contingency and 10% GST — plus a good/better/best 3-tier offer and 30/40/30 progress payments.

Estimate 2026 Australian roof flashing cost by component — chimney, skylight, apron, valley, gutter, parapet — in Colorbond, Zincalume, lead, copper, zinc. Per-metre pricing + storey multiplier.

Estimate Australian 2026 cost to strip an existing roof prior to re-roofing — by area (m²), material (Colorbond, tile, slate, shingles, mod-bit), layers, batten condition, storey, access, and tip distance. Includes skip bin, batten replacement, council permit, and sarking removal.

Estimate Australian 2026 roof ventilation installation cost — ridge vent, eaves intake, whirlybirds, powered roof vents, Solarwhiz / Solar Star. Sized to AS 4859.1 and NCC Vol Two Part F6.

Calculate the rise of a skillion (mono-pitch) roof from span and pitch in degrees. Returns rafter length, slope factor, and surface multiplier to AS 1684 and NCC 2022.

Estimate Australian 2026 eaves lining (soffit) and fascia replacement cost per linear metre, material (Colorbond, fibre-cement Hardie eaves, painted timber, vinyl, HPL composite), storey, and access — full eaves and barge replacement.

Estimate Australian 2026 chimney flashing cost by chimney size, material (Colorbond, Zincalume, lead, copper), brickwork condition, and storey. Sized to AS 1562 and AS 4654 plus Australian roof-plumbing rates.

Estimate Australian 2026 copper roof cost by area, profile (standing seam, batten roll, flat-lock, traditional sheet), copper gauge and storey. Sized to AS 1562.1 and the ARC Code of Practice.

Estimate the full cost to replace a flat or low-slope roof in Australia in 2026: TPO, PVC, EPDM rubber, liquid-applied membrane, or torch-on — with strip-off, insulation, parapet capping and box gutters itemised in AUD.

Compare 2026 Australian gutter prices across PVC, Zincalume, Colorbond Quad, half-round, fascia and box gutters on the same job. DIY material-only vs full installer cost, plus 30-year ownership cost projection per AS/NZS 3500.3.

Estimate 2026 Australian roof sarking and underlay cost by line item: foil-laminated reflective sarking (Bradford Anticon, CSR Sisalation), high-cyclone reflective, woven polypropylene UDL (Roof Plus 426), or full self-adhered SBS, with eaves apron, drip flashing, starter course, strip-out, council consent and skip removal. Real 2026 ARC, MBA and AS 4200.1 / AS 4200.2 contractor rates.

Free Australian roofing square calculator. Convert m² into roofing squares (1 sq = 9.29 m²), then estimate Colorbond sheet count, sarking rolls, ridge cap, and roof screws to AS 1562.1. Includes waste allowance.

Estimate Australian 2026 valley flashing replacement cost by length, material (Colorbond, Zincalume, lead, copper), valley type, and storey count. Sized to AS 1562 and AS 2050 detailing.

Estimate Australian 2026 zinc roof cost by area, profile (standing seam, batten roll, flat-lock, interlocking), thickness (0.7/0.8/1.0 mm), pre-weathered finish, strip-out and access. Sized to AS 1562.1 and the Australian Roofing Contractors Code of Practice.

Estimate 2026 Australian Western Red Cedar shingle and shake roof installation cost by line item: #1 Blue Label, #2 Red Label or #3 Black Label grading, hand-split or taper-sawn cut, optional Class B or Class A BAL-FZ bushfire-retardant treatment, strip-out, anticondensation sarking, stainless nails, Cedar Breather mat, AS 2050 batten, Colorbond ridge, lead or Colorbond valley, council consent and skip disposal. Real 2026 ARC / MBA and Australian Cedar Industries distributor rates.

Estimate 2026 Australian composite (synthetic slate, shake, and polymer terracotta tile) roof installation cost by line item: DaVinci Roofscapes (via Roofing Industries AU), EcoStar, Brava, Inspire, or F-Wave REVIA polymer roofing, Class A fire and Class 4 impact rated, BAL-12.5 to BAL-29 capable with manufacturer documentation, with strip-out, anticondensation sarking, AS 2050 batten, hip and ridge, Colorbond valley, council consent, and skip disposal. Real 2026 ARC and Master Builders Australia rates.

Plan a complete Australian roof replacement in 2026: strip, batten, sarking, Colorbond or terracotta, and full installed cost in A$/m² — itemized by line.

Estimate 2026 Australian TPO single-ply membrane roof cost by line item: 1.2/1.5/2.0 mm thickness, mechanically fixed, fully adhered, induction-welded or ballasted, with PIR insulation, gypsum overlay, outlets, strip-out, council consent and skip removal. Real 2026 ARC, AICA and MBA contractor rates per AS 4654.2.

Estimate annual cooling-energy savings, carbon avoided and payback when upgrading from a dark Colorbond or tile roof to a high-SRI cool roof. Method aligned to CSIRO, Master Builders Australia and NCC 2022 Section J.

Estimate 2026 Australian gutter replacement pricing — tear-out of old gutters, fascia repair, new Colorbond Quad or D-line gutters, downpipes, drip flashing. Per-metre line items.

Estimate 2026 Australian hailstorm roof damage claim by hailstone size, Colorbond/tile/membrane, age and impacted slopes — costed to AS 2050 / AS 1562 and Q1 2026 ARC contractor rates. Tuned to SE QLD / ACT / NSW Hunter hail belt.

Estimate 2026 Australian alpine ice dam risk for ski-region roofs (Snowy Mountains, Victorian High Country, ACT, Tasmanian Central Plateau) by climate zone, pitch, ceiling R-value, ventilation, eave overhang and snowfall — with tiered remediation cost to NCC and AS 4859.

Estimate Australian 2026 mansard roof cost by lower-face area, upper-deck area, materials, dormer count, storey and access. Aligns with AS 2050, AS 1562.1, AS 4654.2, NCC Volume Two, Heritage Overlay state authorities.

Calculate roof snow load to AS/NZS 1170.3:2003 for Australian alpine and sub-alpine zones. Returns ground snow (sg), shape coefficient, exposure factor, thermal factor, and design roof snow load.

Size rainwater downpipes from roof catchment, pitch and rainfall using AS/NZS 3500.3 — round and square Colorbond, Zincalume, copper and uPVC.

Estimate roofing materials for an Australian project in 2026: Colorbond sheets, tek screws, sarking, battens, ridge cap and tiles — with AUD cost ranges and AS 2050 / AS 1562 references.

Estimate Australian 2026 modified-bitumen / torch-on SBS / APP membrane cost by area, layering, reinforcement, insulation, outlets, perimeter upstands and storey. Aligned with AS 4654.1, AS 4654.2 and the ARC Code of Practice for Bituminous Membranes.

Estimate Australian 2026 spray polyurethane foam (sprayed PU) roof cost by area, foam thickness, density, silicone topcoat, storey and access. Aligns with AS/NZS 4859.1 and ARC Code of Practice for sprayed PU roofing.

Estimate the on-slope area of a gambrel (Dutch barn) roof in Australia. Two-pitch geometry, AS 2050 / NCC 2022 references, costed in AUD per m² for 2026.