AC Capacity Calculator
Find the right AC tonnage for a room — right-sized, not oversized (an oversized AC cools fast but leaves the room clammy and wastes energy). Set the room area and tick what applies. It’s a planning start; for anything beyond a room, a proper load calculation is best.
Length × breadth of the room, in square feet (assumes a normal ~10 ft ceiling).
≈ 12,000 BTU/hr · 0.94 tons calculated, rounded up to a standard size.
Buy an inverter unit with the highest BEE star / ISEER you can — it pays back over years of summers. Don’t round up further “to be safe”: oversizing hurts comfort and efficiency.
A planning estimate, not a design. This uses an India-tuned area rule with adjustment factors; real need also depends on insulation, glazing, ceiling height, orientation and local climate. For a whole home, several rooms or any building, use a proper load calculation by an HVAC professional.
Related Guides — Deep-dive reading
Living Room Design in India: Built Around How You Actually Live
Resolving the three competing focal points, sizing to people not floor area, the double-height trap, and the formal-vs-family living room question
Room PlanningThe Complete Guide to Residential HVAC in India
Everything a homeowner needs to plan and choose home cooling, ventilation and comfort — how to select the right system for your home, size it correctly, get clean air and low bills, and where smart HVAC genuinely helps, all grounded in India's climate and market.
HVAC & CoolingProgramming Your Home: Deciding What Every Room Should Do
Before the floor plan, the brief — how to list every space, define its job, size it right, and set adjacencies and priorities
Home PlanningRelated Tools — You may also find these useful
AC Installation Cost Calculator
An indicative equipment + installation budget for your home's air conditioning — by AC type, tonnage and number of units, with a realistic range.
HVACAC Running Cost Calculator
What your AC costs to run each year — from tonnage, BEE star rating, hours and tariff — plus how much a higher star rating saves.
HVACAC Star Rating Savings Calculator
Whether a higher BEE star AC is worth the premium — comparing two star ratings (via ISEER) for your usage to give the annual saving, payback period and lifetime saving.
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