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BTU to Tons

Watts to BTU/hr Calculator

Multiply cooling watts by about 3.412 to get BTU per hour (BTU/hr).

Use the cooling (thermal) watts from the spec sheet, not the input power.

cooling W

Common values

Cooling capacity

Enter a value in cooling W to see it in BTU/hr.

Watts to BTU/hr formula

BTU/hr = cooling W ÷ 0.2930710701722222.

In one step, multiply cooling W by about 3.412142.

Cooling watts are also called thermal watts: the heat an AC removes per second.

1,000 cooling W equals 3,412.1416 BTU/hr.

1,000 ÷ 0.2930710702 = 3,412.1416 BTU/hr

Electrical watts differ

An AC that draws 1,000 W of electricity does not deliver only 3,412 BTU/hr of cooling. Input power and cooling capacity are different quantities.

Working out cooling capacity from input watts needs the AC's efficiency rating.