Concrete & outdoor
Concrete & outdoor calculators
Outdoor jobs are sold by volume and weight: cubic yards or cubic metres of concrete, tons of gravel and asphalt, bags of mulch, pallets of pavers and sod. These calculators take your length, width and depth and give you the amount to order, with a sensible extra for uneven ground.
Concrete can be worked out as bags of pre-mix, as cement, sand and stone to mix yourself, or as a ready-mix order. Decks and fences are counted board by board and post by post — the calculators count materials only and never size structural parts.
Pick a calculator
- Concrete calculatorVolume, bags of pre-mix, or cement, sand and crush for a slab, footing or column.
- Cement calculator50 kg cement bags, sand and crush (bajri) for concrete mixed on site — 1:2:4, 1:1.5:3 or your own mix.
- Gravel, sand & soil calculatorVolume, tonnes and bags of gravel, sand, topsoil or mulch.
- Mulch calculatorCubic yards, m³ and bags of mulch or bark for your beds and depth.
- Paver & patio calculatorPavers or slabs for a patio, path or driveway, plus base stone and bedding sand.
- Sod & turf calculatorSod pieces, turf rolls and pallets for a new lawn, plus topsoil.
- Retaining wall calculatorWall blocks, caps, trench size and gravel for a garden retaining wall.
- Asphalt calculatorTons or tonnes of asphalt (tarmac) for a driveway or path.
- Decking calculatorDeck boards, joists, rim joists, hangers and screws for a rectangular deck.
- Fence calculatorPosts, panels, rails, pickets, gates and post concrete — straight runs or several sides.
Which calculator do I need?
- How much concrete, or how many bags, for a slab?Concrete calculator
- How many bags of cement, and how much sand and crush, for my concrete?Cement calculator
- How many tons of gravel, sand or topsoil?Gravel, sand & soil calculator
- How many cubic yards or bags of mulch?Mulch calculator
- How many pavers, and how much base and sand?Paver & patio calculator
- How much sod or turf for a new lawn?Sod & turf calculator
- How many blocks for a garden retaining wall?Retaining wall calculator
- How many tons of asphalt for a driveway?Asphalt calculator
- How many deck boards, joists and screws?Decking calculator
- How many fence posts, panels or pickets?Fence calculator