Our renovation cost calculator and building calculators work out the materials for a job and what it costs in your city. Each one takes your measurements, gives the quantities (cubic metres of concrete, litres of paint, tiles, bricks, panels and posts) and prices the work from the rates in our cost guides.

Pick a calculator below. Every estimate links straight to a quote request with the job as you priced it.

Concrete CalculatorCubic metres, 20 kg bags and the installed cost per square metre for a slab, driveway, path or patio. Decking CalculatorDeck area, lineal metres of boards, boards to order and the installed cost by material. Paint CalculatorWall area, litres of paint for the coats you want and what a painter charges per square metre. Tile CalculatorArea, number of tiles to buy with an allowance for cuts, and the cost of laying and supply. Roof Pitch CalculatorPitch in degrees from rise and run, roof surface area, and the cost to re-roof in Colorbond or tiles. Fence CalculatorPanels, posts and the installed cost per metre for Colorbond, timber, picket or pool fencing. Bathroom Renovation Cost CalculatorA full bathroom renovation by finish level, or item by item, with figures for your city. Kitchen Renovation Cost CalculatorA full kitchen renovation by finish level, or item by item, with figures for your city. Solar CalculatorDeemed output and STCs for your city, the installed price, and payback on your own electricity tariffs. Soil and Mulch CalculatorTurf, underlay soil, mulch and pavers in square metres, cubic metres and tonnes, with the installed cost. Air Conditioner Size CalculatorThe kW your room needs, the split system size to look at and the installed price in your city. Brick CalculatorBricks, premix mortar bags and sand for your wall, with the bricklaying cost in your city. Stair CalculatorRisers, riser height, treads and run checked against the NCC, with the cost of deck stairs in your city. Pool Volume Calculator and Pool Salt CalculatorLitres in a rectangle, round or oval pool, the salt it needs, and pool service prices in your city. Solar Battery CalculatorThe battery size your evenings need, the installed price, the federal discount and the payback on your tariffs. Paver CalculatorPavers to buy, road base and bedding sand in cubic metres and tonnes, and the laid cost per square metre. Flooring Calculator and Carpet CalculatorSquare metres to order, boxes or carpet off the roll, and the installed cost by flooring type.

Calculators by job

Outside the house

Inside the house

Roof and energy

How the calculators work

Each calculator does two things. First it works out the quantities: cubic metres of concrete, litres of paint, tiles, bricks, pavers, risers, litres of pool water. Every non-price figure it uses, such as bags per cubic metre, coverage per litre or the stair limits in the building code, is taken from a named source and checked against that source when the page is built. The sources include the National Construction Code, Cement Australia, Dulux, Clean Energy Regulator, CHOICE, Midland Brick, AstralPool, Austral Masonry, among others, and each calculator names its own.

Then it prices the job from our cost guides: the low, typical and high figures for 15 Australian cities, so you see a range rather than a single number.

Renovation cost calculator FAQs

Are the calculators free?

Yes. All 17 calculators are free to use, with no sign-up. Each one works out the quantities for the job and prices it, and you can send the estimate to local tradies for quotes if you want them.

Where do the prices come from?

From our cost guides. Every calculator multiplies your quantities by the low, typical and high figures in the price table of the matching guide for your city, so the estimate moves with the guide when its prices are verified again (most recently October 2026).

Which cities do the calculators cover?

15 cities plus a national figure: Sydney, Melbourne, Brisbane, Perth, Adelaide, Gold Coast, Canberra, Hobart, Darwin, Newcastle, Geelong, Sunshine Coast, Townsville, Wollongong and Byron Bay. Pick your city in any calculator to use that city's prices.

How accurate is a renovation cost calculator?

It is an estimate built from typical price ranges, not a quote. Access, the condition of the site, the materials you choose and the time of year all move a real price, which is why each calculator shows a low-to-high range and links to quotes for your job.

Can I put a calculator on my own website?

Yes. The calculator embed page gives you a copy-and-paste code for any of them, with the prices for the city you choose.

Already have a quote?

The quote checker compares a quote you have been given with the price range for that job in your city.