This online calculator converts power values from BTU/hr (British thermal units per hour) to watts (W). BTU/hr is commonly used in the U.S. to describe heating and cooling capacity, while watt (W) is the SI unit of power used globally.

BTU/hr to Watts (W) Converter

Enter a value in BTU/hr and press the button

BTU/hr

Result in Watts (W)

Swap
Calculation process will appear here.
Decimal Places

How to Use

  • Enter the power value in BTU/hr into the input field.
  • Set how many decimal places you’d like the result to show (default is 2).
  • Click “Convert” to calculate the equivalent power in watts.
  • The result will be shown immediately below the input.
  • Use “Copy Result” to copy the output to clipboard.
  • Click “Clear All” to reset the form.
  • Use the “Swap” button to go to the watts to BTU/hr version of this tool.

BTU/hr to Watts Online Calculator

Unit Definitions

BTU per Hour (BTU/hr)

BTU/hr stands for British Thermal Units per hour and is a unit of power in the U.S. customary system. It represents the amount of heat energy transferred per hour. Abbreviations: BTU/hr or BTU/h. System: U.S. customary (imperial-derived). 1 BTU/hr = 0.29307107 watts. It’s mainly used for measuring the heat output of HVAC systems and heating appliances. In SI terms, it converts directly into watts for international use.

Watt (W)

The watt (W) is the SI unit of power and measures the rate of energy transfer equivalent to one joule per second. System: SI (International System of Units). 1 watt = 3.41214 BTU/hr. It’s used globally across electrical and thermal systems to express output power or energy consumption. In this calculator, it’s the output unit derived from BTU/hr input.

Conversion Formula

To convert BTU/hr to watts, use the following formula:

Watts = BTU/hr ÷ 3.41214

Source: Units of measure lookup – PIEE.

Conversion Table

BTU/hrWatts (W)
10029.31
25073.27
500146.55
750219.82
1000293.07
1500439.61
2000586.14
3000879.21
50001465.35
100002930.71

Real-World Examples

  • Small window AC unit (5000 BTU/hr) → 1465.35 W
  • Mini split system (9000 BTU/hr) → 2637.64 W
  • Room heater (1500 W) → 5118.21 BTU/hr
  • Central AC (36000 BTU/hr) → 10550.56 W
  • Server rack (3400 W) → 11601.27 BTU/hr
  • Microwave oven (1000 W) → 3412.14 BTU/hr
  • Electric kettle (1500 W) → 5118.21 BTU/hr
  • Clothes dryer (5400 W) → 18425.56 BTU/hr
  • Hair dryer (1875 W) → 6395.63 BTU/hr
  • Refrigerator (200 W) → 682.43 BTU/hr

What are you using this tool for? Want to see other features or conversions added? Let us know in the comments below.

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