Skip to main content
BTU to Tons

BTU/hr to Watts Calculator

Multiply BTU per hour (BTU/hr) by 0.2930710701722222 to get cooling watts.

Find it on the AC's label or spec sheet.

BTU/hr

Common values

Cooling capacity

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

BTU/hr to watts formula

Cooling W = BTU/hr × 0.2930710701722222.

The factor comes from the International Table BTU: 1 BTU = 1,055.05585262 joules, and an hour has 3,600 seconds.

Cooling watts are also called thermal watts.

12,000 BTU/hr equals 3,516.8528 cooling W.

12,000 × 0.2930710702 = 3,516.8528 cooling W

Cooling watts vs electrical watts

The result is cooling capacity, not the electricity the AC uses.

An AC's electrical watts come from its rated input on the label or spec sheet, or from an efficiency rating. They can't be converted directly from BTU/hr.