AC BTU by Room Calculator

Quick estimate for your project. Free — no account.

Formula

Base BTU ≈ sq ft × 20, adjusted for sun, people, and kitchen.

Worked example

{
  "sqft": 300,
  "sun": "normal",
  "people": 2,
  "kitchen": false
}

Affiliate links, when shown, are labeled.

Source & last checked

Energy Star / DOE sizing guidance

Last checked: 2026-09-25

FAQ
Is this exact?

No. Site conditions, waste, and product coverage vary. Buy a little extra.

Do you sell materials?

No. Optional affiliate links are labeled when present.

Can I embed this?

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