Heat pumps
Heat Pump Calculator NZ
Estimate the heating capacity for your space, the installed budget and the electricity cost. Compare single-split, multi-room and ducted options.
- Room & home sizing
- Installation budget
- Running costs

New Zealand · Home project calculators
Numbers to help you make decisions about your home, starting with heating and outdoor living. Check quantities, budget and assumptions before you talk to a supplier or installer.
Heat pumps
Estimate the heating capacity for your space, the installed budget and the electricity cost. Compare single-split, multi-room and ducted options.
Decking
Work out decking boards, joists, fixings and an indicative NZ installed budget for timber or composite decking.
A useful estimate tells you what to check next. Change the inputs to suit your home, compare the ranges, then print a brief to discuss with an installer.
Our calculators are the first step. We include every one of its assumptions and source links so you can judge what the numbers do (and do not) cover.