Convert Watts to Btu Per Hour

Enter the power in watts below to get the value converted to btu per hour.

Results in Btu Per Hour:
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1 W = 3.412142 Btu/h

How to Convert Watts to Btu Per Hour

To convert a watt measurement to a btu per hour measurement, multiply the power by the conversion ratio. One watt is equal to 3.412142 btu per hour, so use this simple formula to convert:

btu per hour = watts × 3.412142

The power in btu per hour is equal to the watts multiplied by 3.412142.

For example, here's how to convert 5 watts to btu per hour using the formula above.
5 W = (5 × 3.412142) = 17.060712 Btu/h

Watts and btu per hour are both units used to measure power. Keep reading to learn more about each unit of measure.


One watt is the power equal to the rate of energy of one joule per second in an electrical circuit. One watt is also equal to the power produced in a circuit with a voltage potential of one volt with a current of one amp.

The watt is the SI derived unit for power in the metric system. Watts can be abbreviated as W, for example 1 watt can be written as 1 W.

Watt's Law states the relationship between power, current, and voltage. Using Watt's Law, it's possible to express the power in watts as an expression using current and voltage.

PW = IA × VV

The power in watts is equal to the current in amperes times the potential difference in volts.

Combining this with Ohm's Law, it's also possible to express the power in watts using resistance in addition to volts and amps.

Btu Per Hour

One BTU per hour is equal to one british thermal unit, or the energy needed to heat one pound of water 1 °F, for one hour.

The btu per hour is a US customary unit of power. Btu per hour can be abbreviated as Btu/h, for example 1 btu per hour can be written as 1 Btu/h.

Watt Measurements and Equivalent Btu Per Hour Conversions

Common watt values converted to the equivalent btu per hour value
Watts Btu Per Hour
1 W 3.4121 Btu/h
2 W 6.8243 Btu/h
3 W 10.24 Btu/h
4 W 13.65 Btu/h
5 W 17.06 Btu/h
6 W 20.47 Btu/h
7 W 23.88 Btu/h
8 W 27.3 Btu/h
9 W 30.71 Btu/h
10 W 34.12 Btu/h
11 W 37.53 Btu/h
12 W 40.95 Btu/h
13 W 44.36 Btu/h
14 W 47.77 Btu/h
15 W 51.18 Btu/h
16 W 54.59 Btu/h
17 W 58.01 Btu/h
18 W 61.42 Btu/h
19 W 64.83 Btu/h
20 W 68.24 Btu/h
21 W 71.65 Btu/h
22 W 75.07 Btu/h
23 W 78.48 Btu/h
24 W 81.89 Btu/h
25 W 85.3 Btu/h
26 W 88.72 Btu/h
27 W 92.13 Btu/h
28 W 95.54 Btu/h
29 W 98.95 Btu/h
30 W 102.36 Btu/h
31 W 105.78 Btu/h
32 W 109.19 Btu/h
33 W 112.6 Btu/h
34 W 116.01 Btu/h
35 W 119.42 Btu/h
36 W 122.84 Btu/h
37 W 126.25 Btu/h
38 W 129.66 Btu/h
39 W 133.07 Btu/h
40 W 136.49 Btu/h

More Watt Power Conversions

SI Units
Convert to Microwatts
1 W is equal to 1,000,000 microwatts
Convert to Milliwatts
1 W is equal to 1,000 milliwatts
Convert to Kilowatts
1 W is equal to 0.001 kilowatts
Convert to Megawatts
1 W is equal to 1.0E-6 megawatts
US Customary & Imperial Units
Convert to Mechanical Horsepower
1 W is equal to 0.001341 mechanical horsepower
Convert to Electric Horsepower
1 W is equal to 0.00134 electric horsepower
Other Units
Convert to Kilocalories Per Hour
1 W is equal to 0.860421 kilocalories per hour

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.