In a moderate US climate (≈20 BTU per sq ft), 15,000 BTU handles roughly 750 sq ft of average-insulated space. In hot Indian rooms, where solar gain pushes loads to ~100 BTU per sq ft, the same capacity covers about 150 sq ft.
Not sure this is the right size? Run your real room through the AC tonnage calculator — climate, ceilings, sun and occupancy can shift the answer by 30% or more.
Equipment is sold in standard steps, so a 15,000 BTU requirement maps to the nearest purchasable size — see the borderline guidance on the calculator before rounding up. For running costs at this capacity, the bill calculator compares efficiency tiers side by side; for the electrical side (breaker, wire, panel), use the ampere calculator.
15,000 BTU/hr equals about 1.25 tons of air conditioning, because 1 refrigeration ton = 12,000 BTU/hr. That's 4.40 kW of thermal cooling.
At the 20 BTU/sq ft moderate-climate rule, 15,000 BTU covers roughly 750 sq ft. In hot Indian conditions (≈100 BTU/sq ft per room), it covers about 150 sq ft.
15,000 BTU/hr equals 4.40 kW of thermal cooling output. Note this is cooling power, not electricity consumption — a 5-star inverter delivering 15,000 BTU draws only about 0.86 kW of electrical power (ISEER 5.10).
Converters: BTU → TONS TONS → BTU TONS → KW KW → TONS BTU → KW BTU → WATTS TONS → HP TONS → AMPS
BTU values: 5k 6k 8k 9k 10k 12k 14k 18k 24k 30k 36k 42k 48k 60k
Tonnage values: 0.75T 1T 1.5T 2T 2.5T 3T 3.5T 4T 5T
Or skip the conversion and size the room directly with the AC tonnage calculator or BTU calculator.