
Air Conditioner Size Calculator
Not sure what system is right for your space? Use our calculator to estimate the right split, multi-split, ducted, or VRF air conditioning size for your home or project.
Get instant results and request a quote in seconds.
Your Results Explained
Your result gives you a general estimate of the cooling capacity needed for your room or area. It is based on room size, ceiling height, sun exposure, insulation, and other key factors.
As a general guide:
- 2.5 kW – small bedroom or study
- 3.5 kW – standard bedroom
- 5.0 kW – larger bedroom or small living area
- 6.0 to 7.1 kW – medium to large living areas
- 8.0 kW+ – open-plan spaces or larger areas
This calculator is a guide only. Final sizing may vary depending on layout, glazing, orientation, zoning, and installation conditions.
- 2.5 kW – small bedroom or study
Get a Fast Quote
Already know your estimated size? Send us your details and we’ll help you choose the right system for your home or business.
Why Choose Palm Tree Electrical & Air Conditioning
We provide reliable air conditioning solutions for homes and businesses, with expert advice, quality workmanship, and systems tailored to your space and budget.
- Licensed and insured technicians
- Split system and ducted air conditioning specialists
- Residential and commercial service
- Fast quotes and professional advice
- Quality installation and workmanship
Choosing the Right Air Conditioner Size Matters
Choosing the right size air conditioner is important for comfort, efficiency, and long-term performance.
A system that is too small may struggle to cool the room properly and run constantly, increasing power bills. A system that is too large may short cycle, waste energy, and reduce comfort.
A correctly sized system can help improve efficiency, reduce running costs, and deliver more consistent cooling throughout the space.
Whether you are comparing a split system for a bedroom or a ducted air conditioning system for a larger home, starting with the right size is the first step.
Frequently Asked Questions
Question 1
What size air conditioner do I need for a bedroom?Answer
Most bedrooms need a 2.5 kW to 3.5 kW system, depending on room size, insulation, and sun exposure.Question 2
What size air conditioner do I need for a living room?Answer
Living rooms often need between 5.0 kW and 7.1 kW or more, especially if the area is open-plan.Question 3
Is this calculator accurate?Answer
This calculator provides a useful estimate, but final system sizing should be confirmed by a professional assessment.Question 4
Do you supply and install air conditioning?Answer
Yes, we supply and install split system and ducted air conditioning systems for residential and commercial properties.

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