Air Conditioner Size Calculator

🔧 Tiny Home Air Conditioner Size Calculator

Find the perfect system size for your tiny home

Avoid oversizing or undersizing your split-system. Estimate the ideal cooling capacity based on the size of your tiny home, insulation quality, and local climate.

Calculator inputs

Rooms (m²) ?

Total conditioned area: 0.0 m²

Why it matters

Right-sizing your air conditioner prevents energy waste, premature wear, and high running costs. This calculator follows guidance from CHOICE and AIRAH to help you land in the sweet spot.

Helpful extras

Quick reference (CHOICE)

Home Size Example Space Capacity
Up to 20 m² Bedroom / small studio 2 – 2.5 kW
20–40 m² Large studio / living 2.5 – 5 kW
40–60 m² Open-plan living 4 – 6 kW
60 m²+ Large modular home 5 – 9 kW

Why you shouldn’t oversize

Too big

  • Runs short cycles → uneven temperature
  • Poor humidity control
  • Higher power bills & wear

Too small

  • Runs constantly → noisy, dry air
  • Less efficient overall

Sweet spot

  • Choose the smallest unit that comfortably meets your calculated load.
  • Look for inverter units with ≥ 4-star energy ratings.
  • Pair with shading & ventilation for best comfort.
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