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Calculate concrete volume, trucks needed, and accurate project costs
Professional ready mix concrete calculator for slabs, footings, driveways, and foundations. Get instant volume estimates with 2026 pricing for residential and commercial projects.
Professional tool for concrete volume estimation and cost analysis
Calculate exact concrete quantities for slabs, footings, walls, columns, and foundations. Our ready mix concrete calculator uses industry-standard formulas to determine cubic metres needed, ensuring accurate material ordering and eliminating costly shortages or excess waste on your construction site.
Determine the number of concrete trucks required based on standard 6m³ or 8m³ capacities. Plan delivery schedules efficiently, coordinate with ready mix suppliers, and optimize pour logistics for seamless concrete placement without delays or cold joints in your project.
Get comprehensive ready mix concrete cost breakdowns using 2026 market prices ranging from $200-$350 per cubic metre depending on grade and location. Calculate total project costs including delivery charges, pump hire, and aggregate specifications for accurate budget planning.
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A ready mix concrete calculator is an essential construction tool that accurately determines the volume of concrete required for various building projects including slabs, footings, driveways, columns, and foundations. Ready mix concrete (also called RMC or premixed concrete) is manufactured in batching plants according to specified mix designs and delivered to construction sites in rotating drum trucks, ensuring consistent quality and eliminating the need for on-site mixing.
This calculator helps contractors, builders, and homeowners estimate concrete quantities in cubic metres, determine the number of trucks needed for delivery, and calculate total project costs based on 2026 pricing. If you're working in the United States and need pricing per cubic yard instead of cubic metres, see our detailed ready mix concrete cost per yard guide for accurate imperial-based cost breakdowns. By inputting project dimensions and specifications, users receive instant calculations that account for wastage, ensure adequate material ordering, and prevent costly shortages or excess that can delay construction schedules and impact project budgets.
Concrete slabs are the most common ready mix application for residential house slabs, garage floors, and commercial ground floors. Typical slab thickness ranges from 100mm for light residential use to 150-200mm for driveways and commercial applications. A standard 10m × 12m house slab at 100mm thickness requires 12 cubic metres of concrete (typically 2 trucks). Slabs must include steel reinforcement mesh and proper edge formwork to achieve structural integrity and prevent cracking.
Strip footings and pad footings form the foundation base for walls and columns, requiring concrete grades from 20 MPa to 32 MPa depending on load requirements. Strip footings typically measure 300-600mm wide and 300-500mm deep, while pad footings range from 600mm × 600mm to 1200mm × 1200mm for heavy structural loads. Foundation concrete must be placed on properly compacted soil or engineered fill with adequate bearing capacity to prevent settlement.
Driveways require 100-125mm thickness for standard vehicles or 150mm for heavy vehicles and trucks. Concrete grades of 25-32 MPa with reinforcement mesh ensure durability under vehicle loads and weather exposure. Proper sub-base preparation with 75-100mm compacted crushed rock provides drainage and prevents cracking. Control joints at 3m spacing accommodate concrete shrinkage, while troweled or broom finishes provide appropriate surface texture for traction.
Concrete columns and piers support structural loads from beams and slabs, typically using 32-40 MPa concrete with internal steel reinforcement. Column dimensions vary based on design loads from 300mm × 300mm for residential applications to 600mm × 600mm or larger for commercial buildings. Accurate volume calculations prevent delays as columns are often poured continuously without cold joints, requiring precise concrete ordering to complete each element.
| Concrete Grade | Strength (MPa) | Typical Applications | Cost 2026 | Delivery Time |
|---|---|---|---|---|
| 20 MPa | 20 | Residential footings, garden beds, backfill | $200-$220/m³ | 60-90 min |
| 25 MPa | 25 | House slabs, garage floors, light pathways | $220-$240/m³ | 60-90 min |
| 32 MPa | 32 | Driveways, footpaths, structural footings | $250-$270/m³ | 60-90 min |
| 40 MPa | 40 | Suspended slabs, columns, commercial floors | $280-$310/m³ | 60-90 min |
| 50 MPa | 50 | High-rise buildings, heavy industrial floors | $320-$360/m³ | 45-75 min |
| Colored/Exposed | 25-32 | Decorative driveways, polished concrete | $280-$400/m³ | 60-90 min |
Contact ready mix suppliers 2-3 days before pour date with specifications including grade (MPa), slump (typically 80-120mm), aggregate size (usually 20mm), and delivery time. Provide accurate volumes calculated with this tool, confirming site access for trucks (4m width, 4.5m height clearance required for standard agitator trucks). Schedule deliveries with 20-30 minute intervals between trucks for large pours.
Standard ready mix trucks carry 6m³ or 8m³ loads with maximum travel time of 90 minutes from plant to maintain workability. Coordinate with concrete pumping services if direct placement isn't possible - pumps cost $400-$800 for standard residential jobs. Ensure clear access paths, adequate space for truck positioning, and stable ground conditions to support 30+ tonne loaded trucks.
Concrete retains workability for 60-90 minutes in standard conditions, less in hot weather. Plan for continuous placement without extended delays causing cold joints which compromise structural integrity. Have adequate labor crew (typically 4-6 workers for residential slabs) ready before delivery. Schedule morning pours in summer heat, avoiding placement in rain or when temperatures exceed 35°C without special precautions.
Inspect delivery dockets confirming ordered grade, slump, and batch time. Test slump on-site using standard cone test ensuring within specification (±25mm tolerance). Prepare cylinder samples (typically 3 sets) for strength testing at 7 and 28 days per AS 1379 standards. Reject loads showing premature stiffening, contamination, or incorrect specifications.
Calculate ready mix concrete for a standard residential house slab measuring 12m × 10m at 100mm thickness:
Calculate concrete for a driveway measuring 6m × 3m at 125mm thickness:
Calculate concrete for strip footings 30m total length × 450mm wide × 400mm deep:
Minimum Loads: Most ready mix suppliers apply minimum charges for loads under 2-3 m³, making small pours expensive per cubic metre. Consider batching multiple small pours together or using bag mix for very small quantities under 1m³. Always confirm minimum load policies and delivery charges when requesting quotes from suppliers to avoid unexpected costs.
Ready mix concrete prices in 2026 range from $200/m³ for basic 20 MPa footings mix to $360/m³ for high-strength 50 MPa structural concrete in metropolitan areas. Standard 25-32 MPa grades for residential slabs cost $220-$270/m³. Pricing varies by region with remote areas adding $20-$50/m³ for extended travel from batching plants. Volume discounts apply on large orders over 50m³, reducing unit costs by 5-10% on major commercial projects.
Delivery charges typically range from $80-$150 per truck depending on distance from the batching plant. Standard delivery within 20km costs $80-$100 per truck, increasing $10-$15 per additional 10km travel distance. Saturday deliveries add 25-50% surcharge, while Sunday and public holiday deliveries cost 50-100% premium. Minimum delivery charges of $100-$180 apply for small loads under 3m³, significantly increasing per-cubic-metre costs on minor projects.
Concrete pumping services cost $400-$800 for standard residential jobs (2-4 hours) or $180-$280/hour for extended commercial pours. Line pumps suit most applications, while boom pumps for high-rise or difficult access cost $250-$350/hour. Special finishes including colored concrete add $40-$80/m³, exposed aggregate $60-$120/m³, and decorative stamped patterns $80-$150/m². Accelerators, retarders, and waterproofing admixtures add $8-$25/m³ depending on dosage requirements.
Smart Scheduling: Schedule concrete deliveries for weekdays rather than weekends to avoid 25-50% surcharges. Batch multiple small pours together to minimize delivery fees and meet minimum load requirements. Consider alternative access methods like wheelbarrows for very small areas rather than expensive concrete pumping. Request quotes from multiple suppliers as prices vary $20-$40/m³ between companies for identical specifications.
Proper site preparation is critical for successful concrete placement. Ensure formwork is secure, level, and adequately braced to resist concrete pressure (approximately 24 kN/m³ or 2.4 tonnes/m³). Install reinforcement mesh or bars at correct spacing and height using plastic chairs maintaining 30-50mm cover for slabs and 40-75mm for footings. Verify sub-base is properly compacted to 95% standard density, eliminating soft spots that cause settlement cracks.
Place concrete continuously in one direction, avoiding segregation by limiting drop height to 1.5m maximum. Work concrete into corners and around reinforcement using vibrators or hand tools, eliminating air pockets and honeycombing. Maintain consistent slump throughout pour, adding water only under supervision as excessive water reduces strength by 20-30% and increases shrinkage cracking. Complete placement of each section before initial set (typically 60-90 minutes in moderate conditions).
Begin finishing when bleed water evaporates and concrete surface is firm enough to support worker weight. Use screeds to level, floats to smooth, and trowels for final finish. Apply curing methods immediately after finishing - use plastic sheeting, wet hessian, or curing compounds to maintain moisture for minimum 7 days. Protect concrete from rain, extreme heat, and freezing for first 24-48 hours. Proper curing improves final strength by 50% and dramatically reduces surface cracking.
Weather Considerations: Ideal placement temperature is 15-25°C. In hot weather (over 30°C), use ice in mix, increase cement content, add retarders, or schedule early morning pours. Cold weather (under 5°C) requires heated concrete, windbreaks, and insulated curing blankets. Never place concrete on frozen ground or in rain as excess water reduces strength and causes scaling. Monitor weather forecasts 48 hours before scheduled pours.
Under-ordering is the most costly mistake creating cold joints that weaken structures and require expensive remediation. Always add 5-10% wastage allowance accounting for uneven sub-grades, formwork movement, and spillage. Round up to full truck loads rather than ordering partial loads which incur minimum delivery charges. It's better to have 0.5m³ excess (usable for paths, garden edging, or post footings) than to fall short and compromise structural integrity with restart costs of $300-$500 for additional truck mobilization.
Specifying wrong concrete grade compromises structural performance or wastes money on over-specification. House slabs require 25 MPa minimum, driveways need 32 MPa, and structural footings specify 20-32 MPa per engineering requirements. Using 20 MPa for driveways causes premature cracking and spalling under vehicle loads. Consult structural engineers or local building codes to confirm appropriate grades - the $20-$50/m³ cost difference is insignificant compared to repair expenses from failure.
Inadequate site access causes project delays and additional costs. Ready mix trucks require 4m width, 4.5m height clearance, and stable ground supporting 30+ tonnes. Narrow driveways, overhead wires, soft ground, or tight turns prevent direct delivery, requiring expensive pumping ($400-$800) or wheelbarrow placement (extremely labor intensive). Assess access during planning, arrange temporary access roads, obtain neighbor permissions for truck positioning, and trim overhanging branches preventing access.
Calculate concrete volume by multiplying length × width × depth in metres. For a slab: Volume = Length (m) × Width (m) × Thickness (m). Example: 10m × 8m × 0.1m = 8 m³. Add 5-10% wastage for formwork variations and spillage. For circular shapes use πr²h formula. For footings multiply length × width × depth. Always convert thickness from millimetres to metres by dividing by 1000 (e.g., 100mm = 0.1m). Round up to nearest half or full cubic metre when ordering. Use this ready mix concrete calculator for instant accurate results including truck requirements and costs.
Ready mix concrete costs in 2026 range from $200-$360 per cubic metre depending on grade and location. Standard grades: 20 MPa footings $200-$220/m³, 25 MPa house slabs $220-$240/m³, 32 MPa driveways $250-$270/m³, 40 MPa structural $280-$310/m³, and 50 MPa high-strength $320-$360/m³. Add delivery charges of $80-$150 per truck. Minimum charges apply for loads under 3m³. Colored or exposed aggregate concrete costs $280-$400/m³. Pumping services add $400-$800. Regional pricing varies ±$20-$50/m³ from metropolitan rates. Weekend deliveries incur 25-100% surcharges. Request quotes from multiple suppliers as prices vary significantly.
Standard ready mix concrete trucks carry 6 cubic metres (6m³) or 8 cubic metres (8m³) depending on truck configuration and legal road limits. Most residential deliveries use 6m³ trucks which fit better in suburban streets with tighter access. Mini trucks carry 4m³ for very restricted access sites but cost proportionally more per cubic metre. Large commercial trucks may carry up to 10m³ on highway-rated routes. When calculating truck requirements, divide total concrete volume by truck capacity and round up to next whole number. Example: 15m³ project requires 3 trucks of 6m³ capacity (15 ÷ 6 = 2.5, round to 3 trucks). Always confirm truck size when ordering.
Ready mix concrete is manufactured in computerized batching plants ensuring consistent quality, precise proportions, and certified strength. It's delivered by truck in exact quantities needed, eliminating on-site mixing labor and equipment costs. Site-mixed concrete (using mixer or wheelbarrow) suits very small jobs under 1m³ where minimum ready mix delivery charges ($150-$250) make it uneconomical. Ready mix quality is superior with better strength consistency, proper mixing, and professional quality control. Site mixing is labor intensive, prone to inconsistent proportions affecting strength, and practical only for non-structural applications like garden edging or fence posts. For any structural element (slabs, footings, driveways), always use certified ready mix concrete meeting Australian Standards AS 1379.
Ready mix concrete remains workable for 60-90 minutes after batching in standard conditions (20-25°C temperature). Hot weather (over 30°C) reduces workability time to 45-60 minutes, while cool weather (10-15°C) extends it to 90-120 minutes. Concrete suppliers specify maximum delivery time, typically 90 minutes from plant to pour site. Beyond this, concrete begins setting, loses workability, and cannot be properly placed or finished. Retarding admixtures can extend workability to 2-3 hours for long-distance deliveries or complex pours. Never add water at site as it reduces strength by 20-30% and increases cracking. If concrete has stiffened before placement, reject the load - don't compromise structural integrity by placing unworkable concrete.
Concrete grade selection depends on application: 20 MPa for residential footings and non-structural backfill; 25 MPa for house slabs, garage floors, and light pathways; 32 MPa for driveways, heavy-duty slabs, and structural footings; 40 MPa for suspended slabs, columns, and commercial floors; 50 MPa for high-rise buildings and heavy industrial applications. Australian Standards specify minimum grades for structural elements - consult AS 3600 or your structural engineer. Using lower grades than specified compromises safety and building code compliance. Over-specifying (using 40 MPa where 25 MPa suffices) wastes $50-$80/m³ unnecessarily. When in doubt, specify 32 MPa as it suits most residential and light commercial applications with good durability margin.
Concrete pumping is required when trucks cannot directly discharge concrete into formwork due to access restrictions, distance, or obstacles. Pumping costs $400-$800 for residential jobs (2-4 hours) but provides efficient placement over 30-50m horizontal distance or 15-25m vertical height. You need pumping if: truck cannot get within 3-4m of pour location; site has narrow driveways, gates, or overhead restrictions; multi-level pours require concrete lifted to upper floors; or placing concrete in backyard areas inaccessible to trucks. Line pumps suit most residential applications, while boom pumps serve high-rise and complex access situations. Wheelbarrow placement is possible for small volumes (under 2m³) within 10m of truck but is extremely labor-intensive and slow, risking cold joints on larger pours.
Standard ready mix concrete weighs approximately 2.4 tonnes (2400 kg) per cubic metre. This density varies slightly with aggregate type: normal weight concrete with crushed rock aggregates weighs 2.3-2.5 tonnes/m³, while lightweight concrete using expanded clay or pumice weighs 1.4-1.9 tonnes/m³. A standard 6m³ truck carries about 14.4 tonnes of concrete plus truck weight of 12-15 tonnes, totaling 26-29 tonnes. This weight consideration is critical for site access - ground must support these loads without rutting or sinking. Suspended floors, formwork, and shoring must be designed for concrete dead load plus 25-50% live load during placement. For weight calculations: multiply concrete volume (m³) by 2.4 to estimate tonnes for structural loading and truck access assessments.
Slump measures concrete workability (how easily it flows and consolidates) using a standard cone test. Higher slump = more workable/fluid concrete. Standard slump specifications: 60-80mm for heavily reinforced sections requiring good compaction; 80-100mm for normal slabs and footings; 100-120mm for walls and columns; 120-160mm for pumped concrete; and 160-180mm for self-compacting or highly flowable concrete. Over-ordering slump (too fluid) causes segregation, bleeding, and reduced strength. Under-ordering (too stiff) makes placement difficult, creates honeycombing, and risks incomplete consolidation around reinforcement. For most residential slabs specify 80-100mm slump. Pumped concrete requires 100-120mm minimum. Always test slump on arrival - reject loads outside ±25mm tolerance from specification. Never add water at site as it dramatically weakens concrete.
Order ready mix concrete 2-3 working days before pour date for standard grades and quantities. Large commercial pours (over 100m³), special grades (over 50 MPa), colored concrete, or weekend deliveries require 5-7 days advance booking. Provide supplier with: concrete grade (MPa), slump (mm), aggregate size (typically 20mm), special requirements (color, admixtures, exposure classification), total volume needed, delivery date and time, site address, and access details. Confirm order 24 hours before delivery verifying truck size fits site access. Have contingency plans for weather delays - most suppliers allow postponement with 24 hours notice without penalty. Short-notice orders (same day or next day) may be available during off-peak periods but carry 10-25% surcharges and limited time slot availability. Early booking ensures scheduled delivery times matching your crew and pump availability.
AS 1379 Specification and Supply of Concrete provides comprehensive requirements for ready mix concrete production, delivery, and quality control. AS 3600 Concrete Structures covers design and construction standards ensuring structural compliance for 2026 projects.
View Standards →Concrete Institute of Australia offers technical guidance, best practice recommendations, and professional development for concrete construction. Access resources on concrete specifications, placement techniques, and quality assurance procedures for ready mix applications.
Learn More →Cement Concrete & Aggregates Australia provides industry guidelines, technical data sheets, and educational materials on concrete technology, sustainable practices, and construction methods for ready mix concrete applications in residential and commercial projects.
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