ZovaTool

BTU Calculator

BTU/hr
6,000
Tons
0.5
kW
1.76

How to use the BTU Calculator

  1. Enter room area in sq ft or sq m.
  2. Pick climate zone, sun exposure, occupants and whether it's a kitchen.
  3. Read required BTU/hr, tons of cooling, and kW.
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Sizing an air conditioner

Baseline rule of thumb: 20 BTU per sq ft. Climate, sun and occupancy can shift this ±25%.

Over-sizing causes short-cycling — the unit cools fast but never dehumidifies, leaving the room clammy.

1 ton of cooling = 12,000 BTU/hr ≈ 3.52 kW.