Free calculators
Quick, free tools for planning a job or pricing your work. No sign-up, and nothing you type leaves your device.
- GST Calculator NZFree NZ GST calculator. Add 15% GST to a price or work out the GST in a GST-inclusive amount, to the cent. No sign-up.Open
- Concrete CalculatorWork out how much concrete you need in cubic metres and premix bags for a slab, path, footing or fence and deck post holes. Free and metric.Open
- Decking CalculatorFree deck calculator: enter your deck size and board width to estimate decking boards, joists and screws, with a waste allowance.Open
- Paint CalculatorFree paint calculator: enter your room size, doors, windows and coats to see how many litres of paint you need and how many tins to buy.Open