Free renovation calculators
Work out your materials, step sizes and costs. No sign-up.
- Decking calculatorBoards, joists, screws and a rough cost for your deck.
- Stair calculatorStep height, tread depth and stringer length, checked against the code.
- Bathroom renovation cost calculatorA 2026 price range for your bathroom, by size and finish.
- Kitchen renovation cost calculatorA 2026 price range for your kitchen, by size and finish.
- Renovation cost calculatorAdd up a whole home renovation, room by room.
- Balustrade calculatorQueensland height and gap rules, balusters needed and a rough cost.
- Fence calculatorPosts, rails, palings and a rough cost for a timber paling fence.
Where do the numbers come from?
Every rule comes from the National Construction Code 2022, which Queensland uses until 1 May 2027, and Timber Queensland's data sheets. Every price comes from a published 2026 cost guide, mostly What's The Damage's Gold Coast pages. We checked each one on its source page on 27 October 2026, and each page names its sources.
They are a guide for planning, not a design or a quote. A licensed trade should check the details for your job.
Who made these calculators?
Field Carpentry is Brett Field, a QBCC licensed carpenter on the Gold Coast with more than 25 years on the tools. These calculators are free for anyone planning a deck, stairs or a renovation, and need no sign-up.
On the Gold Coast and want a real price? Call Brett for a free quote.
