Construction & Materials

Work out how much concrete, gravel, paint or tile a job needs — and what it will cost.

Concrete

Slabs, footings, columns and post holes — volume, bags, weight and cost.

• Concrete Bag Calculator How many bags of concrete a volume needs — 80 lb, 60 lb, 40 lb, 25 kg and 20 kg side by side, with the total weight to carry.
• Concrete Column & Pier Calculator Concrete for round or square columns and piers — volume per column, total, bags, weight and cost.
• Concrete Driveway Calculator Concrete needed for a driveway — volume, bags, weight and cost, at the thickness a vehicle actually needs.
• Concrete Footing Calculator Concrete for strip footings and pad foundations — total volume, bags, weight and cost for a trench run or a set of pads.
• Concrete Mix Ratio Calculator Cement, sand, aggregate and water for a given volume of concrete, at standard mix ratios from C10 to C30.
• Concrete Path Calculator Concrete for a path or sidewalk — volume, bags, weight and cost for a long, narrow pour.
• Concrete Patio Calculator Concrete for a patio slab — volume, bags, weight and cost, with the right thickness for foot traffic.
• Concrete Slab Calculator Work out how much concrete a slab needs in cubic yards or metres, how many bags that is, what it weighs, and whether ready-mix or bags works out cheaper.
• Concrete Steps Calculator Concrete for solid poured steps — volume, bags, weight and cost, from the rise, going and number of steps.
• Concrete Wall Calculator Concrete for a poured wall — volume, bags, weight and cost, with openings deducted.
• Garage Floor Calculator Concrete for a garage floor slab — volume, bags, weight and cost at vehicle-rated thickness.
• Post Hole Concrete Calculator Concrete to set fence or deck posts — hole volume less the post itself, per hole and in total.
• Ready-Mix vs Bags Calculator Compare the real cost of ready-mix delivery against bagged concrete, including delivery and short-load fees.
• Shed Base Calculator Concrete for a shed or garden-building base — volume, bags, weight and cost, sized to the building plus an overhang.