Driveway Concrete Calculator
Calculate exactly how much concrete you need for any driveway — residential cars, trailers or heavy vehicles. Get volume, premix bags and cost estimate with the correct thickness for your application.
🔨 Driveway Concrete Calculator
📐 How It Works
Driveway concrete volume is length × width × thickness. The correct thickness depends on the vehicle loads — under-specifying leads to cracking and failure within years. Always use the correct thickness for your application and include steel mesh or rebar reinforcement.
📋 Worked Example
Double garage driveway 10m × 6m at 125mm (light trailer use): Area = 60 m². Volume = 60 × 0.125 = 7.5 m³. With 10% waste = 8.25 m³. At $225/m³ = $1,856 for concrete supply.
❓ Frequently Asked Questions
Passenger cars only: 100mm minimum, 125mm recommended. Towing trailers or caravans: 125–150mm. Light trucks or delivery vehicles: 150mm. Heavy vehicles, semi-trailers or forklifts: 200mm minimum, engineer-designed. Thicker driveways cost more but last significantly longer.
Yes — residential driveways should include SL82 or SL92 mesh centrally placed in the slab. Without reinforcement, concrete cracks from thermal movement, tree roots and vehicle loads. Mesh doesn't prevent cracking but keeps cracks tight and the slab functional.
Yes — compact gravel or road base sub-base of 100mm minimum before pouring. This provides drainage, uniform support and prevents slab settlement. Poorly compacted or soft subgrade is the most common cause of driveway failure — not the concrete itself.
Light foot traffic: 24 hours. Passenger vehicles: 7 days minimum. Full vehicle loads: 28 days for full cure strength. Keep vehicles off fresh concrete and protect from rain in the first 24 hours. Premature loading causes permanent damage that cannot be repaired.