Working on an indoor project? indoorcalc.com.au — paint, tiles, wallpaper, flooring and more. Free Australian indoor calculators.
Built for Australian backyards
How much mulch, soil or turf do you actually need?
Free outdoor calculators in cubic metres, tonnes and bags — not yards and pounds. Work it out in seconds, order the right amount, get back to the job.
The calculators
Fourteen live calculatorsMulch calculator
Cubic metres, bags and tonnes for any garden bed. Works with bark, woodchip, sugar cane, pine.
Garden bedsGarden soil calculator
Work out how many cubic metres of garden soil, compost or mix you need to fill a bed or raised planter.
Garden bedsGarden bed volume
Soil volume for raised veggie beds and planters — rectangular or round, single or multiple beds.
LawnsTurf calculator
Square metres of instant turf, roll count, underlay soil — with AU roll sizes for Sir Walter, Empire and more.
FencingFence post concrete
Bags of rapid-set concrete for a run of posts. Works for Colorbond, timber palings and pool fencing.
ConcreteConcrete slab calculator
Cubic metres, 20 kg bags and ready-mix for shed bases, driveways, patios and garage floors.
ConcreteConcrete volume
Cubic metres and 20 kg bags (Boral, Cement Australia) for slabs, strip footings and post holes.
PavingPaver quantity
Paver count, plus sand and road base underneath. Handles standard AU paver sizes.
BrickworkBrick wall calculator
How many bricks and bags of mortar for a garden wall or feature wall. Standard AU brick sizes.
LandscapingGravel & aggregate
Cubic metres and tonnes of road base, decomposed granite, pebbles and river rock.
Outdoor livingDecking calculator
Boards, linear metres and screws for timber and composite decking. Covers Merbau, treated pine and standard AU sizes.
WaterRainwater tank sizing
Right-size your tank for roof area, annual rainfall and household use.
PoolsPool volume & chlorine
Litres, kilolitres, and a starting dose for chlorine and salt by pool size.
StructuresRetaining wall blocks
Blocks, sleepers or besser blocks for a wall of any length and height.
Garden guides
Practical advice from a Queensland tradespersonHow much mulch do Australian gardens actually need?
Depth, type and quantity explained — plus when to buy in bulk and when bags make sense.
FencingColorbond vs timber paling fence in Queensland
Cost, lifespan, maintenance and council rules — a straight comparison for Queensland homeowners.
LawnsHow to plan a new lawn in Australia
Turf variety, soil preparation and how much to order — practical advice for Australian conditions.
Free tools. Zero fluff.
Metric-first, always
Every calculator uses cubic metres, millimetres, kilograms and tonnes — the units you'll see on the invoice from your local landscape yard.
No sign-up, no email
Type your numbers in. Get your answer. Leave. We don't want your email address and we're not going to chase you with a newsletter.
Phone-friendly
Built for standing in the garden with a tape measure in one hand. Big inputs, clear outputs, no pinch-to-zoom.
Honest disclaimers
Every result rounds up sensibly and tells you to add 10% for waste. We want you to order enough the first time.