Aircon size calculator: what capacity do you need
Work out roughly what cooling capacity (in watts) your room or home needs before you talk to an installer. This helps you avoid paying for an oversized system or ending up with one that struggles on hot days.
This is an estimated capacity range in watts; an installer will confirm the exact unit size after a site visit.
Compare actual quotes for this projectThis is an estimate only; a contractor should confirm exact sizing on site.
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Get quotes from top-rated split system installers
Ranked by our published rubric from recent Google reviews, weighted by relevance to this service (the same order as the category page).
Web X Electricians PerthGet a quote5.0(337) 95
J & C Electrical ContractingGet a quote5.0(572) 94
WestOz TradesGet a quote5.0(1023) 94
Sharp Air-conditioning and RefrigerationGet a quote4.9(362) 93
Pure Electrical & AirGet a quote4.9(465) 93