Concrete Slab Cost Calculator built for Australian concreters
Give homeowners an instant slab estimate — shed, garage, house or patio — and capture every lead with dimensions, thickness and reinforcement detail. Your rates, your brand, GST included.
This is the live concrete slab cost calculator your homeowners will use.
yourbusiness.com.au/concrete-slab-cost-calculator
Step 1 of 6 — Slab Dimensions
1Slab Dimensions
2Slab Specification
3Reinforcement
4Site Conditions
5Surface Finish
6Your Details
Slab Dimensions
m
m
Your estimate
Concrete (supply + place)
$1,080
Formwork
$840
Reinforcement
$216
Excavation / site prep
$0
Concrete pump
$0
Surface finish
$0
Subtotal (ex GST)
$2,500
GST (10%)
$250
Subtotal (ex GST)
$2,500
GST (10%)
$250
Total$2,750
Price range: $2,338 – $3,162
Estimate valid for 30 days
This is a price indication only. Our team will be in touch to confirm the final price after assessing the job.
*This is a price indication only. Your tradie will confirm the final price after assessing the job.
Step 1 of 6 — Slab Dimensions
1Slab Dimensions
2Slab Specification
3Reinforcement
4Site Conditions
5Surface Finish
6Your Details
Slab Dimensions
m
m
Concrete Slab Cost Calculator · powered by LeadkitPowered by Leadkit
Interactive preview — try different slab sizes and finishes.
Instant Notifications
Know the Moment a Lead Arrives
The second someone completes your calculator, you get a celebration notification with their full details — name, contact, project info, and estimated value.
Real-time alerts — no refreshing needed
Full customer details at a glance
One click to view the complete lead
Score and value calculated automatically
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Your first lead just arrived!
Someone just requested an estimate on your website — their details have been captured and a new lead is ready in your dashboard.
Sarah Mitchell
Just now
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Email sarah@example.com
Calculator Concrete Slab Cost Calculator
Status New
Est. value $4,200
View Lead Details
I'll check it later
Automated Emails
Professional Emails Sent Automatically
Every calculator submission triggers branded emails — an instant estimate for your customer and a detailed lead notification for you.
Customer Estimate — Instant branded estimate sent to your customer
Lead Alert — New lead notification sent to your inbox
Updated Estimate — Revised estimate sent when you update pricing
Expiry Notice — Reminder sent when an estimate is about to expire
All prices in AUD · GST inclusive · Cancel any time, no calls or forms
Common questions
What others asks before signing up?
How much does a concrete slab cost in Australia?
A standard 100 mm shed or garage slab costs $65–$110 per m² installed, while a 150 mm house slab with engineered reinforcement runs $100–$200 per m². This calculator gives you an instant estimate based on your dimensions, thickness and finish — your concreter confirms the final price after a site assessment.
What thickness do I need for a concrete slab?
100 mm suits sheds, patios and light-use areas. 125 mm works for garages with occasional vehicle access. 150 mm is recommended for house slabs, driveways bearing regular traffic and industrial floors. An engineer may specify thicker for reactive soils.
Do I need an engineer for a house slab?
In most Australian states a house slab requires an engineer-designed footing and slab plan, especially on reactive or problem soils. The engineer specifies thickness, reinforcement layout, edge beams and any piers — the cost is separate from the slab pour itself.
How accurate is this concrete slab calculator?
It uses real Australian per-m³ concrete rates, formwork, reinforcement, excavation and pump costs to produce a close estimate. It is a price indication only — your concreter confirms the final price after checking soil conditions, levels and access on site.
Can I embed this calculator on my website?
Yes. Copy one line of embed code and paste it into WordPress, Webflow, Squarespace, Wix or Shopify. The calculator inherits your brand colours and sends every lead to your dashboard.
What do I get when someone fills out the calculator?
You receive an instant email and dashboard notification with the homeowner's name, phone, email, location, slab dimensions, thickness, reinforcement type and estimated value — a fully qualified lead.
What if I don't have a website?
Every Leadkit account includes a free hosted estimate page with your branding. Share the link on social media, Google Business Profile or in messages — no website needed.
Is Leadkit really free?
Yes. Free lets you add up to 3 calculators to your website and receive 10 leads per month — no credit card. Every lead beyond the cap is still captured and held for you; upgrading to Pro ($29/mo) opens them all retroactively and removes the cap.
Do I need to know how to code?
No. You get an embed code (one line of HTML). Paste it into your website builder — Wix, Squarespace, WordPress, or any custom site. That's it.
How accurate are the price estimates?
You configure the calculator formulas to match your actual pricing. Leadkit provides the framework; you set the numbers. Estimates can be as detailed or as rough as you like.
What happens with lead data?
All lead data is stored securely in your workspace. You own it. We never sell or share your leads with anyone.
Can I use Leadkit as an agency for multiple clients?
Yes — our Agency plan lets you create and manage separate workspaces for each of your clients, all from one dashboard.
What's the difference between the plans?
Free: up to 3 calculators, 10 leads/month (over-cap leads held + locked until upgrade). Pro: unlimited leads, unlimited calculators, white-label, branded email sending, analytics, email templates. Agency: everything in Pro plus multi-workspace management.
Get Started Free
Start capturingslab leads today
Set up your concrete slab calculator in 60 seconds. Your rates, your brand, qualified leads straight to your inbox.
The section below is for homeowners researching concrete slab costs. We break down how prices are calculated, show current Australian averages, and answer the questions we hear most. Every number reflects real 2026 rates from Australian tradies — not marketing fluff.
Based on AU market ratesGST includedUpdated for 2026
For homeowners
Get an instant concrete slab quote
Find out what your shed, garage, patio or house slab will cost — without waiting for a site visit. The estimate is a price indication; your concreter confirms after assessing the site.
Enter length, width, thickness and finish for an instant estimate
See a full cost breakdown including formwork, reinforcement and GST
Compare finishes — broom, trowelled, exposed aggregate or coloured
Get connected with a local concreter who can confirm the price
For concreters
Capture qualified slab leads while you pour
Homeowners enter their slab dimensions and specs, get an instant estimate at your rates, and leave their details — you get a qualified lead with volume, reinforcement and contact info.
Your rates, your branding, your ABN on every PDF
Lead score helps prioritise callbacks
Free for up to 5 calculators — $29/mo for unlimited
Works on WordPress, Webflow, Squarespace, Wix and Shopify
How it works
How this concrete slab estimate is calculated
This calculator produces an estimate based on typical Australian concreting rates — not a binding quote. Your concreter will confirm the final price after a site assessment.
GST handling: All estimates include GST at 10% as required by Australian Tax Office guidelines for registered businesses.
1
Calculate volume
Multiplies length × width × thickness to determine total concrete volume in cubic metres.
volume = area × thickness
2
Price concrete supply and placement
Applies the per-m³ rate to the volume, adjusted by slab purpose (house slabs cost more due to structural requirements).
concrete_cost = volume × rate × purpose_factor
3
Add formwork and reinforcement
Formwork is priced per lineal metre of perimeter. Reinforcement is priced per m² based on mesh, mesh+rebar or engineered specification.
4
Factor in site prep, pump and finish
Excavation or fill is added when site prep is needed. Pump hire applies as a flat fee. Finish surcharges (exposed aggregate, coloured, trowelled) are priced per m².
5
Apply access factor, GST and minimum
Tight or difficult access increases the total. A minimum job fee ensures small slabs are viable. GST (10%) is added to the subtotal.
Sydney and Melbourne typically 15–25% above these averages. Regional and rural areas are often 10–15% below, though delivery surcharges may apply for remote sites.
