• 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.

  • Air Conditioner Size Calculator

    Choose the system type below to estimate the right air conditioning size for your room, multiple rooms, whole home, or larger project.

    Choose system type
    Single room details
    Room Area
    20.0 m²
    Estimated Cooling Load
    3.00 kW
    (3000 W)
    Suggested Size
    3.5 kW
    Based on your result: 3.5 kW system recommended
    • Split is best for one room or one area.
    • Multi-split suits several rooms on one outdoor unit.
    • Ducted is best for whole-home comfort and zoning.
    • VRF is a guide only for larger or more complex projects.
    This is a guide only. Final sizing may vary depending on layout, glazing, insulation, zoning and installation conditions.
  • 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.

  • 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.