Fast, Free & Accurate Concrete Estimates for Sunshine Coast, QLD
Calculate exactly how much concrete you need for any project on the Sunshine Coast —
slabs, driveways, footings, columns, and steps. Get volume in m³, bag count,
and 2026 cost estimates instantly.
✅ Slabs & Driveways
✅ Footings & Columns
✅ 2026 Cost Estimates
✅ Bag Calculator
Sunshine Coast Concrete Volume Calculator
Whether you're pouring a backyard slab, a driveway, or footings for a new structure
on the Sunshine Coast, our free calculator gives you accurate concrete quantities
and 2026 price estimates in seconds.
🏠 Why Use This Calculator?
Over-ordering or under-ordering concrete wastes both money and time. Our Sunshine Coast
concrete calculator gives you a precise m³ figure so you can confidently order from
local suppliers across Maroochydore, Noosa, Caloundra, and Nambour — no guesswork,
no costly shortfalls on pour day.
📐 Multiple Project Types
From standard rectangular slabs and driveways to round post-hole footings and stepped
areas, the calculator handles the most common residential and commercial concrete
scenarios seen across the Sunshine Coast, including hinterland and coastal strip projects.
💰 2026 Sunshine Coast Pricing
Ready-mix concrete on the Sunshine Coast typically ranges from
$185 – $270 per m³ in 2026, depending on mix strength, location,
and additives. Use the cost estimator below to get a ballpark figure before
contacting your local QLD supplier.
🧱 Sunshine Coast Concrete Calculator
Select your project type, enter dimensions, and get instant results
Enter the longest dimension
Enter the shortest dimension
100 mm = standard slab; 150 mm = driveway
Internal diameter of the column/hole
Total depth of the pour
How many identical columns?
Typical: 150 – 190 mm
Typical: 250 – 300 mm
2026 estimate: $185 – $270/m³ on Sunshine Coast
Total Concrete Required (with wastage)
0.00 m³
Including selected wastage allowance
Net Volume
—
20 kg Bags
—
25 kg Bags
—
Estimated Cost
—
📋 Full Breakdown
Net concrete volume—
Wastage allowance—
Total volume to order—
Mix strength selected—
20 kg bags needed—
25 kg bags needed—
Estimated material cost—
Est. pump hire (if needed)—
How the Sunshine Coast Concrete Calculator Works
The calculator uses standard volumetric formulas to determine how much concrete your project requires.
For rectangular pours the calculation is straightforward; for round columns it applies the circular
cross-section area formula. A wastage factor is then added to ensure you don't run short on pour day —
especially important on the Sunshine Coast where the sub-tropical climate means work must often
be completed quickly before afternoon heat and humidity set in.
Tip: Convert thickness from mm to metres before calculating (e.g. 100 mm = 0.10 m)
2026 Concrete Prices on the Sunshine Coast, QLD
The Sunshine Coast is serviced by several concrete batching plants across Maroochydore,
Nambour, Caloundra, and Noosaville. Being a fast-growing region, concrete demand is high
— especially during the residential construction season from March to November. The table
below shows 2026 guide pricing for common mix strengths in the area.
Mix Strength
Common Use
Price per m³ (AUD)
Min. Order
Slump
N20 (20 MPa)
Paths, garden edging, low-load slabs
$185 – $205
0.2 m³
80 mm
N25 (25 MPa)
House slabs, footpaths, shed floors
$205 – $228
0.2 m³
80 – 100 mm
N32 (32 MPa)
Driveways, garage floors, crossovers
$228 – $250
0.2 m³
100 mm
N40 (40 MPa)
Commercial slabs, structural elements
$250 – $272
0.5 m³
100 – 120 mm
Coloured / Exposed Aggregate
Decorative driveways, pool surrounds, patios
$265 – $330
1 m³
80 mm
N20 – 20 MPa
Common UsePaths, garden edging
Price per m³$185 – $205
Min. Order0.2 m³
N25 – 25 MPa
Common UseHouse slabs, shed floors
Price per m³$205 – $228
Min. Order0.2 m³
N32 – 32 MPa
Common UseDriveways, garage floors
Price per m³$228 – $250
Min. Order0.2 m³
N40 – 40 MPa
Common UseCommercial / structural
Price per m³$250 – $272
Min. Order0.5 m³
Coloured / Exposed Aggregate
Common UseDriveways, pool surrounds
Price per m³$265 – $330
Min. Order1 m³
⚠️ Price Disclaimer: Prices above are 2026 guide estimates for the Sunshine Coast region.
Always obtain quotes directly from your local Sunshine Coast concrete supplier as prices vary with
fuel costs, aggregate availability, and seasonal demand. Short loads (under 1 m³) will attract
a short-load surcharge from most QLD suppliers.
Sunshine Coast Concrete Project Guide
Different projects on the Sunshine Coast require different thicknesses, mix strengths, and
reinforcement. The subtropical climate, sandy coastal soils, and high humidity all influence
concrete design and curing. The guide below covers the most common residential applications
across Maroochydore, Noosa, Caloundra, Buderim, Coolum, and Mooloolaba.
🏠 Concrete House Slab — Sunshine Coast
Standard residential slabs on the Sunshine Coast are typically 100 mm thick
with N25 or N32 concrete and SL82 or SL92 mesh reinforcement. Coastal areas with sandy,
well-drained soils are generally Class A or S sites, while hinterland areas may have
reactive soil conditions requiring a soil classification report before specifying your slab type.
🚗 Concrete Driveway — Sunshine Coast
Driveways on the Sunshine Coast should be a minimum 100–125 mm thick using
N32 concrete for standard passenger vehicles. Exposed aggregate and coloured concrete finishes
are very popular on the Sunshine Coast for their aesthetic appeal and slip resistance —
particularly around pool areas. Install control joints every 3–4 m to prevent thermal cracking.
🏗️ Footings & Foundations
Strip footings on the Sunshine Coast are typically 300 mm wide × 200 mm deep
using N25–N32 concrete with R10 tie bars for single-storey construction. Coastal and hinterland
lots may have varying soil conditions — always confirm footing depth requirements with a
geotechnical report and your building certifier before pouring.
🏊 Pool Surrounds & Patios
Pool surrounds and outdoor entertaining areas are a major concrete use on the Sunshine Coast
given the outdoor lifestyle. These are typically 100 mm thick with N25 concrete
and an exposed aggregate or brushed finish for wet-area safety. An anti-slip sealer is recommended
to maintain grip in the region's high rainfall and humidity. Use our slab calculator for
accurate volume estimates.
🔵 Post Holes & Columns
Deck post footings and pergola columns on the Sunshine Coast typically use 300–450 mm diameter
holes at 600–900 mm depth with N25 concrete. In coastal areas with sandy soils, you may need
deeper footings to reach stable bearing ground. Our column calculator handles any number of
posts — enter diameter, depth, and quantity for an instant m³ and bag result.
🪜 Concrete Steps
Concrete steps on the Sunshine Coast should follow the NCC standard of
150–175 mm rise and 250–300 mm run. Given the region's
frequent rainfall, an exposed aggregate or non-slip broom finish is strongly recommended
on all external steps. N32 concrete is preferred for exterior steps for its durability
in the humid, coastal environment.
Concrete Pouring Tips for Sunshine Coast Conditions
🌦️ Sunshine Coast Climate Note: The Sunshine Coast has a warm subtropical climate
with hot, humid summers and mild winters. Summer afternoons often bring heavy thunderstorms — never
pour concrete just before forecast rain. High humidity affects curing rates and surface finishing
windows, so early morning pours are strongly recommended from November through March.
Summer humidity and heat: The Sunshine Coast's humid summers (often 30°C+ with high humidity) accelerate concrete set times. Pour early morning — ideally before 8 AM — to maximise your working window. Use a retarder admixture during the hotter months and begin curing with wet hessian or a curing compound immediately after finishing.
Avoid pouring before rain: Afternoon storms are common on the Sunshine Coast from October to April. Check the Bureau of Meteorology forecast and schedule your pour for mornings when the afternoon outlook is clear. Fresh concrete damaged by heavy rain will need to be removed and repoured — a costly mistake.
Coastal saltwater exposure: Properties within a few kilometres of the Sunshine Coast beach should use concrete with low water-cement ratio and consider stainless steel or epoxy-coated reinforcement to resist chloride-induced corrosion. Ask your supplier about marine-grade admixtures.
Control joints: Install saw-cut or formed control joints at regular intervals (3–4 m) in all slabs. The temperature variation between Sunshine Coast winters and summers, combined with high humidity swings, makes thermal cracking a real risk without proper jointing.
Concrete pump hire: Pump hire on the Sunshine Coast typically costs $450 – $850, depending on location and pour size. Budget for this if your site has restricted access — common in coastal hinterland acreage properties and steeply sloped Sunshine Coast hinterland blocks.
Ordering in advance: The Sunshine Coast construction industry is very active — contact your local ready-mix supplier at least 48 hours ahead, and further in advance during peak building periods (post-storm season, spring, early summer).
Curing in humidity: High humidity on the Sunshine Coast can actually slow surface evaporation, which may extend your finishing window in cooler months. However, direct sun and wind on summer days still cause rapid surface drying — always protect freshly poured concrete from direct sun exposure.
✅ Pro Tip: For Sunshine Coast projects over 3 m³, always use ready-mix concrete
from a local batching plant. It saves significant labour time and guarantees a consistent,
AS 1379-compliant mix. For decorative applications like exposed aggregate — extremely popular
on the Sunshine Coast for driveways and pool surrounds — discuss mix design and sealer
options with your supplier well before pour day.
Building a new outdoor entertaining area? Use our
Alfresco Slab Calculator
to get an accurate concrete estimate for your Sunshine Coast alfresco, pergola, or covered outdoor space.
Concrete Bag Coverage Reference — Sunshine Coast
For very small jobs on the Sunshine Coast where ready-mix isn't practical — such as a single fence
post or a small repair — pre-mixed bags are an option. Use the table below to estimate quantities,
but note that for any pour over 0.5 m³, ready-mix is far more cost-effective.
Bag Size
Yield per Bag (m³)
Bags per 1 m³
Approx. Price per Bag (AUD)
Cost per m³
20 kg bag
0.009 m³
~111 bags
$8 – $12
~$900 – $1,320
25 kg bag
0.011 m³
~91 bags
$10 – $15
~$910 – $1,365
40 kg bag
0.018 m³
~56 bags
$16 – $22
~$896 – $1,232
20 kg Bags
Yield per bag0.009 m³
Bags per m³~111 bags
Cost per m³~$900 – $1,320
25 kg Bags
Yield per bag0.011 m³
Bags per m³~91 bags
Cost per m³~$910 – $1,365
40 kg Bags
Yield per bag0.018 m³
Bags per m³~56 bags
Cost per m³~$896 – $1,232
💡 Bagged vs Ready-Mix on the Sunshine Coast: Bagged concrete costs roughly
4× more per m³ than ready-mix from a local Sunshine Coast batching plant. For any pour
exceeding 0.5 m³, ready-mix concrete is the clearly better choice for
both quality and cost savings.
How do I use the Sunshine Coast concrete calculator?
Select your project type (slab, driveway, footing, column, or steps), enter your dimensions in metres or millimetres as prompted, choose your wastage allowance and mix strength, then click Calculate. The tool instantly shows total m³ required, 20 kg and 25 kg bag quantities, and an estimated cost based on 2026 Sunshine Coast pricing.
How much does concrete cost on the Sunshine Coast in 2026?
Ready-mix concrete on the Sunshine Coast ranges from approximately $185/m³ for N20 mix up to $272+/m³ for N40 structural concrete in 2026. Decorative and exposed aggregate concrete can reach $330/m³. These prices exclude pump hire ($450–$850) and finishing labour costs. Always get a current quote from your local Sunshine Coast or Noosa region supplier as prices vary seasonally and with site conditions.
What is the best time to pour concrete on the Sunshine Coast?
The best time to pour concrete on the Sunshine Coast is early morning, particularly between May and September during the dry season. During summer (November to March), plan pours for very early morning before 8 AM to avoid the heat, humidity, and afternoon thunderstorms that are common in the region. Always check the Bureau of Meteorology Sunshine Coast forecast the day before your scheduled pour and reschedule if rain is expected within 24 hours.
Do I need special concrete for coastal Sunshine Coast properties?
Yes. Properties within 1–3 km of the Sunshine Coast beachfront or tidal waterways are exposed to elevated chloride levels in the air and soil. This accelerates corrosion of standard steel reinforcement. For these locations, consider using a low water-cement ratio mix (N32 or N40), concrete with supplementary cementitious materials such as fly ash or slag, and stainless steel or epoxy-coated reinforcement bars. Discuss marine-grade concrete options with your local Sunshine Coast supplier.
How much wastage should I allow on the Sunshine Coast?
A standard 10% wastage allowance is recommended for most Sunshine Coast residential projects. For irregular-shaped pours, sloped hinterland sites, or projects with lots of formwork (steps, retaining walls), increase to 15%. For large, well-prepared flat slabs on sandy coastal ground, 5–8% may be sufficient. Always err on the side of ordering slightly more — running short on a Sunshine Coast pour day can be costly and time-consuming to resolve.
Do I need a building approval for a concrete slab on the Sunshine Coast?
In the Sunshine Coast Council local government area, a building approval (development approval) is generally required for slabs associated with new structures such as sheds, garages, and house additions. Some small freestanding slabs and pathways may be exempt, but Queensland's building regulations change regularly. Always check with Sunshine Coast Council or a licensed building certifier before commencing any concrete work to avoid compliance issues.
What concrete finish is best for Sunshine Coast pool surrounds?
Exposed aggregate is the most popular finish for pool surrounds on the Sunshine Coast — it provides excellent slip resistance when wet, is durable in the subtropical climate, and looks great. Honed concrete and brushed (broom) finishes are also common. Avoid smooth trowelled finishes around pools as they become dangerously slippery when wet. Whichever finish you choose, apply a penetrating anti-slip sealer every 2–3 years to maintain grip in the region's high UV and humidity conditions.
How many 20 kg bags of concrete do I need per m³?
You need approximately 110–111 bags of 20 kg pre-mixed concrete per cubic metre (m³). Each 20 kg bag yields approximately 0.009 m³ when mixed correctly. Our Sunshine Coast concrete calculator automatically shows the 20 kg bag count in the results — simply enter your dimensions, select your wastage, and read off the bag quantity needed for your project.
The Australian Standard for specification and supply of concrete. Ensure your
Sunshine Coast supplier provides AS 1379 compliant ready-mix for all structural
and residential pours.
Always check the Bureau of Meteorology forecast before scheduling your pour —
critical on the Sunshine Coast where afternoon summer storms can damage freshly
poured concrete in minutes.
Technical guides on concrete mix design, coastal exposure conditions, curing in
subtropical climates, and best practices for residential and commercial construction
across Queensland.
