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Mini-split sizing calculator

Estimate the cooling capacity for one room or connected open area.

Room areaFloor area of one room or open zone.sq ftCeiling heightUse the average height.ftSummer climateChoose typical summer conditions.Sun exposureThink about the hottest part of the day.

Insulation

Regular occupantsKitchen in this zoneAdds cooking heat.

Measure one connected zone

Closed rooms need their own load estimate. Do not add the whole floor area unless air can move freely through it.

MINI-SPLIT

ROOM WIDTH

ROOM LENGTH

Afternoon sun

Use finished, conditioned floor area. Exclude closets and rooms behind closed doors.

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HVAC Judge provides general information and planning estimates, not a diagnosis, installation design, warranty decision, or contractor quote. Check equipment details with the manufacturer and use a qualified HVAC professional before repair, replacement, or installation.