Use this online calculator to convert power from watts (W) to British thermal units per hour (BTU/hr). Watts are the SI unit of power used globally in electrical and mechanical contexts. BTU/hr is a non-SI unit widely used in the U.S. to express thermal output of heating and cooling equipment.

Watts (W) to BTU/hr Converter

Enter a value in watts and press the button

Watts (W)

Result in BTU/hr

Swap
Calculation process will appear here.
Decimal Places

How to Use

  • Enter a value in watts into the input field.
  • Select the desired number of decimal places for the result (0–10).
  • Click the “Convert” button to calculate BTU/hr.
  • The result will appear in the output field below.
  • Click “Copy Result” to copy the converted value to your clipboard.
  • Click “Clear All” to reset all fields to default.
  • Use the “Swap” button to access the BTU/hr to Watts version of this tool.

Watts to BTU/hr Converter Online

Unit Definitions

Watt (W)

The watt is the standard unit of power in the International System of Units (SI), defined as one joule per second. Abbreviation: W. System: SI. It quantifies the rate at which energy is transferred or converted. 1 watt = 3.41214 BTU/hr. In imperial terms, 1 watt ≈ 0.0009478 BTU per second.

British Thermal Unit per Hour (BTU/hr)

BTU/hr is a unit of power in the U.S. customary system. It represents the amount of thermal energy transferred in one hour. Abbreviation: BTU/hr (also seen as BTU/h). System: U.S. customary (non-SI). 1 BTU/hr = 0.29307107 watts. It’s widely used to specify the capacity of heating and cooling appliances such as air conditioners, heaters, and furnaces.

Conversion Formula

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

BTU/hr = Watts × 3.41214

Source: Units of measure lookup – PIEE.

Conversion Table

Watts (W)BTU/hr
13.41214
1034.1214
50170.607
100341.214
250853.035
5001706.07
7502559.105
10003412.14
20006824.28
500017060.7

Real-World Examples

  • Intel Core i9-13900K TDP = 125 W → 426.52 BTU/hr
  • Typical LED light bulb = 10 W → 34.12 BTU/hr
  • Hair dryer = 1875 W → 6395.63 BTU/hr
  • Microwave oven = 1000 W → 3412.14 BTU/hr
  • Window AC unit (5000 BTU/hr) → 1465.98 W
  • Gaming laptop charger = 230 W → 785.79 BTU/hr
  • Electric kettle = 1500 W → 5118.21 BTU/hr
  • Refrigerator (Energy Star, 150 W) → 511.82 BTU/hr
  • Space heater = 2000 W → 6824.28 BTU/hr
  • Server rack PSU = 1200 W → 4094.57 BTU/hr

What are you using this tool for? Do you need any other features added? Let us know in the comments below!

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