What size AC for a 10×10 bedroom?
100 sq ft needs about 2,500 BTU calculated — practical minimum units are 6,000–9,000 BTU. A 9,000 BTU unit is the most common choice for comfort and humidity control.
Room AC Calculator
Bedrooms need less BTU per sq ft than kitchens or sunrooms — fewer appliances, often smaller windows, and less daytime occupancy. Enter dimensions and mark shaded if the room gets little direct sun.
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Bedroom sizing examples
A 10×10 bedroom (100 sq ft) calculates to ~2,500 BTU — practical minimums are 6,000–9,000 BTU. A 9,000 BTU unit is the most common choice for comfort and humidity control while sleeping.
Master bedrooms over 350 sq ft often need 12,000 BTU. See how many BTU for a bedroom for more examples.
Portable vs mini-split for bedrooms
Portables are easier to install but noisier and vent hot air through a window kit. Mini-splits cost more upfront but are quieter — size both using the same BTU load from this calculator.
Frequently asked questions
Is 8,000 BTU enough for a bedroom?
Usually yes for rooms under 350 sq ft with average insulation. Larger master bedrooms (400+ sq ft) often need 12,000 BTU.
Portable AC vs mini-split for bedroom?
Portable units are easier but less efficient and noisier. Mini-splits cost more but are quieter and better for sleeping — size both by the same BTU load.
Related calculators
HVAC Calculators · https://hvaccalculators.net/room-ac-calculator/