Calculate Concrete Cost Per Square Metre From Your Own Area, Total Quote, Slab Thickness And Concrete Price Per Cubic Metre. Compare Material-Only Concrete Cost With Broader Installed Project Cost Without Relying On A Fixed National Price.
Use A Known Area And Total Cost, Calculate Area From Rectangle Dimensions, Estimate Concrete Material Cost From Thickness And A$/m³, Or Compare A Known Concrete Volume With Area And Total Cost.
Your Concrete Cost Per Square Metre Will Appear After You Press Calculate Cost Per m².
| Calculation Mode | Area + Total Cost |
| Base / Known Area | 0.00 m² |
| Thickness / Average Thickness | — |
| Concrete Volume Before Allowance | — |
| Concrete Volume With Allowance | — |
| Concrete Material Cost | — |
| Fixed Extra Charges | — |
| Final Cost Per Square Metre | A$0 /m² |
The PDF Includes The Calculation Mode, Area, Concrete Volume Where Available, Thickness Where Available, Material Cost, Fixed Extras, Total Cost And A$/m² Result.
Concrete Cost Per m² Can Be Calculated Directly From A Total Quote And Area, Or Built From Slab Thickness And A Concrete Rate Per Cubic Metre. The Figure Keeps Each Cost Step Separate So The Labels Stay Inside Their Cards On Desktop, Tablet And Mobile.
Keep Area, Thickness, Cubic-Metre Price And Broader Project Cost Separate So You Can Compare Quotes On The Same Basis.
Use A Known Area Or Calculate A Rectangle From Length And Width.
See How Thickness Changes Concrete Volume And Material Cost Per m².
Calculate Material Volume Where Thickness Or Known m³ Is Available.
Divide Relevant Total Cost Across The Concrete Area.
Compare The Implied Cubic-Metre Cost Where Volume Is Known.
Save A Clear Cost-Per-Area Breakdown For Quote Comparison.
Concrete cost per square metre is a useful comparison metric because it spreads a total cost across the surface area of the slab, driveway, path, patio or other concrete work. The basic calculation is simple: divide the relevant total cost by the concrete area in square metres. The important part is deciding which costs are included in that total.
Concrete Cost Per m² = Total Relevant Cost ÷ Concrete Area (m²)
If a contractor quote for a 50 m² slab is A$10,000 and that quote genuinely covers the same scope you want to compare, the average project cost is A$200/m². If another quote covers only delivered concrete but excludes labour, reinforcement and formwork, its A$/m² number should not be compared directly with the fully installed quote.
To estimate the concrete material cost per square metre, you need slab thickness and the supplier's price per cubic metre. One square metre of slab at 100 mm thick contains 0.10 m³ of concrete before any allowance. At 150 mm thick, the same square metre contains 0.15 m³. That is why thickness directly changes concrete material cost per square metre.
Concrete m³ Per m² = Thickness (mm) ÷ 1000
Once volume per square metre is known, multiply by the supplier's A$/m³ rate. If fixed delivery or small-load charges apply, those fees can be spread across the total project area to show their effect on A$/m².
A 75 mm slab uses 0.075 m³ of concrete per square metre. A 100 mm slab uses 0.10 m³ per square metre. A 150 mm slab uses 0.15 m³ per square metre. If the same cubic-metre rate applies, the 150 mm slab uses twice as much concrete material per square metre as the 75 mm slab.
| Slab Thickness | Concrete Per 1 m² | Concrete Per 10 m² | Concrete Per 100 m² |
|---|---|---|---|
| 75 mm | 0.075 m³ | 0.75 m³ | 7.50 m³ |
| 100 mm | 0.100 m³ | 1.00 m³ | 10.00 m³ |
| 125 mm | 0.125 m³ | 1.25 m³ | 12.50 m³ |
| 150 mm | 0.150 m³ | 1.50 m³ | 15.00 m³ |
| 200 mm | 0.200 m³ | 2.00 m³ | 20.00 m³ |
For a rectangular slab, multiply length by width. A 10 m × 4 m driveway section has an area of 40 m². If the project contains several rectangles, calculate each one and add the results. For a dedicated area tool, use the Concrete Area To Square Metres calculator.
If a contractor quote already includes the complete concrete scope, divide the quote total by the measured concrete area. Before relying on the result, read the scope carefully. Check whether excavation, base preparation, formwork, reinforcement, concrete supply, pumping, finishing, saw cutting, curing, cleanup and tax are included.
Material-only cost can include ready-mix concrete and possibly delivery or small-load charges. Installed concrete cost may also include labour, reinforcement, formwork, excavation, compacted base, pumping, finishing and contractor overhead. Some quotes include all of those items; others list them separately.
| Cost Type | May Include | Commonly Excludes | Best Use |
|---|---|---|---|
| Concrete Material Only | Concrete m³ | Labour, Forms, Reinforcement | Supplier Comparison |
| Delivered Concrete | Concrete + Delivery | Placement & Finishing | Supply Comparison |
| Placed Concrete | Supply + Placement | Scope Dependent | Crew / Contractor Comparison |
| Installed Slab | Broader Project Scope | Depends On Quote | Project Budgeting |
Driveway cost per square metre can be influenced by thickness, reinforcement, sub-base, excavation, access, slope, drainage, edge forms, concrete finish and project size. A small driveway may have a higher A$/m² because fixed setup and delivery costs are spread over fewer square metres.
Patio pricing can differ from driveway pricing because the slab thickness, reinforcement, finish, access and decorative requirements may be different. Compare quotes on the same finish and preparation scope rather than using one generic square-metre price for every concrete surface.
Shed slabs can include thickened edges, beams, reinforcement and hold-down details. A flat surface-area rate may hide those extra cubic metres. Calculate the actual concrete volume with the Concrete Volume Calculator or Concrete Foundation Calculator before comparing material costs.
Narrow paths can have more formwork edge per square metre than a large open slab. Access and manual handling can also increase labour. This means a path and a large slab may not have the same installed A$/m² even when their concrete thickness is similar.
Material estimates often include a small quantity allowance for excavation or measurement variation. If you add a waste percentage to concrete volume, that extra concrete increases the material cost per square metre. Avoid adding the same contingency twice if the quote or quantity already includes it.
Fixed delivery fees affect small projects more strongly on a per-square-metre basis. A A$300 fixed charge spread across 20 m² adds A$15/m². The same A$300 spread across 100 m² adds only A$3/m². This is why project size matters even when the base A$/m³ concrete rate stays the same.
Small-load or minimum-order fees can make small pours relatively expensive. The headline cubic-metre price may not show this effect. Use the supplier's actual fee and spread it across the project area if you want a realistic material-only A$/m² figure.
Pumping may be a fixed setup plus time or volume charge. If pump cost is part of the concrete placement scope, include it in the total cost before dividing by area. If you are comparing material-only ready-mix rates, keep pump cost separate.
Reinforcement cost depends on bar or mesh type, quantity, laps, chairs, tying and labour. It is not automatically included in the concrete material price. If one contractor includes reinforcement and another excludes it, adjust the comparison before judging the A$/m² result.
Formwork cost is affected by perimeter length, slab shape, edge depth and access. Two slabs with the same area can have different formwork requirements. A long narrow slab typically has more perimeter per square metre than a compact square slab.
Broom, trowel, exposed aggregate, decorative, coloured or other specified finishes can change labour, materials and timing. Compare square-metre rates only when the required finish is the same.
Excavation depth, spoil removal, access and ground conditions can change installed cost significantly. A quote that includes excavation and disposal should not be compared directly with a quote that starts from a fully prepared base.
Multiply the cost per square metre by the total concrete area. This is useful for rough scaling, but only when the unit rate remains valid at the new project size. Fixed charges, minimum loads and setup costs can cause the real A$/m² to change as area changes.
Total Cost = Concrete Area (m²) × Cost Per m²
Concrete prices and installed project costs vary by location, supplier, specification, access, labour conditions, project size and finish. This calculator therefore leaves every price field empty. Enter current quote figures rather than relying on a prefilled national average.
A$/m³ describes a volume-based concrete rate. A$/m² describes cost spread over surface area. The two are connected by thickness. Without thickness, you cannot convert a material price per cubic metre into a material cost per square metre.
Use the same area and project scope for both quotes. Check whether each quote uses the same slab thickness, concrete specification, reinforcement, finish, base preparation, delivery, pumping and tax treatment. Then calculate A$/m² for each quote.
Use the Concrete Price Calculator for a delivered ready-mix style estimate, the Concrete Cost Calculator for a broader concrete project estimate, and the Concrete Thickness Calculator when area and concrete volume are known but average thickness needs to be checked.
For Australian concrete industry information, consult Cement Concrete & Aggregates Australia. For workplace safety guidance relevant to silica-generating concrete work, see Safe Work Australia.
These examples show the arithmetic only. They are not current market-price claims.
| Example | Area | Total Relevant Cost | Cost Per m² |
|---|---|---|---|
| Example A | 20 m² | A$4,000 | A$200/m² |
| Example B | 40 m² | A$7,200 | A$180/m² |
| Example C | 60 m² | A$9,900 | A$165/m² |
| Example D | 100 m² | A$15,000 | A$150/m² |
Keep Area, Thickness, Concrete Volume And Project Scope Visible Instead Of Treating A$/m² As A Standalone Number.
The Denominator Used To Spread The Total Cost.
Controls Concrete Volume Per Square Metre.
Connects The Surface Area To Supplier A$/m³ Pricing.
Determines Whether The Unit Rate Is Material-Only Or Installed.
Quick Answers About A$/m², Slab Thickness, Concrete Volume, Installed Cost And Quote Comparison.
Divide The Relevant Total Concrete Or Project Cost By The Concrete Area In Square Metres.
Yes For Material-Based Pricing. A Thicker Slab Uses More Cubic Metres Of Concrete Per Square Metre.
One Square Metre At 100 mm Thick Uses 0.10 m³ Of Concrete Before Any Allowance.
One Square Metre At 150 mm Thick Uses 0.15 m³ Of Concrete Before Any Allowance.
No. All Price Fields Start Empty So You Can Enter Current Supplier Or Contractor Figures.
The 0 Is Only A Placeholder. The Field Is Actually Empty, So Typing 5 Gives 5 Rather Than 05.
No. A$/m² Is Cost Per Surface Area. A$/m³ Is Cost Per Concrete Volume. Thickness Connects The Two.
Only If The Quote Says It Does. Always Check The Scope Before Comparing Unit Rates.
Include Delivery If You Want A Delivered-Material Or Installed-Project Comparison. Keep It Separate If You Are Comparing Concrete Material Rates Only.
Yes. Enter The Driveway Area And Total Relevant Cost, Or Use Area, Thickness And Your Concrete A$/m³ Rate For A Material-Only Estimate.
Yes, Provided You Enter The Correct Area And Compare Quotes With The Same Thickness, Reinforcement, Finish And Preparation Scope.
The PDF Includes The Calculation Mode, Area, Volume Where Available, Thickness Where Available, Material Cost, Extras, Total Cost And A$/m².
Use Current Supplier Quotes, Contractor Scopes, Project Documentation And Relevant Industry Guidance Alongside Any Online Cost Estimate.
Australian Concrete And Aggregate Industry Information And Technical Resources.
Visit CCAANational Workplace Guidance About Concrete-Related Silica Hazards And Controls.
Read Silica GuidanceConfirm Current A$/m³ Rate, Delivery, Small-Load, Pump And Waiting Charges.
Confirm Exactly Which Preparation, Reinforcement, Finishing, Curing And Cleanup Items Are Included.