THE SHORT ANSWER
Estimate a concrete patio by recording its area, specified thickness and resulting volume, then adding site preparation, forms, delivery and finishing. Geometry helps calculate quantities; it does not establish a suitable structural or drainage design.
This Australian walkthrough uses a fictional 3.66 × 6.1 m patio example in Darwin, Northern Territory. The matching concrete patio estimate example shows the same item quantities and amounts in an app-exported PDF. Measure your own site and replace the example rates before issuing a client quote.
1. Keep geometry and design separate
Write down length, width and the thickness specified for the actual project. The example’s 101.6 mm thickness is an arithmetic input, not a recommendation for every site or use. Confirm the design and conditions before buying concrete.
For this example, the agreed starting scope is: Provide a 3.66 × 6.1 m rectangular patio with an illustrative 101.6 mm thickness. Price basic site preparation, forms, base allowance, reinforcement allowance, 2.48 m³ of concrete supply and placement/finishing. Design and site suitability must be confirmed separately. A change to a listed surface, product or access assumption should trigger a revised line or allowance.
2. Calculate volume in metric units
The measured patio area is 22.3 m². At the example's illustrative 101.6 mm thickness, 22.3 m² × 0.1016 m = 2.27 m³ of geometric concrete volume. The separate supply line allows 2.48 m³. Confirm the specified thickness, waste and supplier order for the actual site.
3. Price the work around the concrete
Excavation, base, forming and access can be substantial even when concrete volume is modest. Identify what preparation is included and what conditions would require revision. Include supplier delivery charges or minimums when they apply to your actual quote.
4. Define finish and site handoff
Record the agreed surface finish and what cleanup means. Clarify removal of existing material, surrounding landscape restoration and access requirements. Keep drainage decisions and design approvals explicit rather than implying the sample resolves them.
Worked concrete patio calculation
Two checkable lines from the example are 22.3 m² × A$22.60 = A$503.98; 19.51 m × A$18.00 = A$351.18. The full 7-line estimate totals A$3,829.01 with the demonstration tax input at 0%. The amount is a fictional scenario, not an Australian market rate or a recommended selling price.
Material purchasing and installed quantities may differ. For your own estimate, use the actual takeoff, supplier prices, labour plan, access and disposal requirements. Decide how overhead, profit and the applicable tax treatment affect your final quote; do not copy the example's zero tax setting.
Before you share the estimate
- Confirm dimensions and specified thickness.
- Check delivery access and supplier charges.
- Define preparation, base and finish scope.
- Resolve design and drainage requirements separately.
Scope boundary in this example: No engineered design, difficult excavation, existing slab removal, pumping, retaining work or landscape restoration.
Confirm the client details and location, item descriptions, measured units, total and validity date. If opening up the work reveals a different condition, document the changed scope and price before proceeding.
Common questions about concrete patio
How do I calculate concrete volume in cubic metres?
Multiply measured area in square metres by the specified thickness in metres. Keep any ordering allowance separate and confirm the design, site and supplier requirements.
Does a patio estimate establish the correct slab thickness?
No. An estimate prices an agreed scope. Thickness, reinforcement and suitability need to be determined for the actual site and intended use.
FROM SCOPE TO PDF
Make your own concrete patio estimate.
Describe the actual job in Estimates on iPhone or Android, then review every quantity, rate and scope note. Add your business and client details, check the document and share an itemised PDF. Example amounts are fictional, and some app features may require an in-app purchase.
