Milliwatts to Btu Per Hour Conversion

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

Results in Btu Per Hour:
Loading content.
1,000,000 mW = 3,412.14245 Btu/h

How to Convert Milliwatts to Btu Per Hour

To convert a milliwatt measurement to a btu per hour measurement, multiply the power by the conversion ratio.

Since one milliwatt is equal to 0.003412 btu per hour, you can use this simple formula to convert:

btu per hour = milliwatts × 0.003412

The power in btu per hour is equal to the milliwatts multiplied by 0.003412.

For example, here's how to convert 500 milliwatts to btu per hour using the formula above.
500 mW = (500 × 0.003412) = 1.706071 Btu/h

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


One milliwatt is the power equal to 1/1,000 of a watt, or the energy consumption at a rate of 1/1,000 of a joule per second.

The milliwatt is a multiple of the watt, which is the SI derived unit for power. In the metric system, "milli" is the prefix for 10-3. Milliwatts can be abbreviated as mW; for example, 1 milliwatt can be written as 1 mW.

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.

In formal expressions, the slash, or solidus (/), is used to separate units used to indicate division in an expression.

Milliwatt to Btu Per Hour Conversion Table

Milliwatt measurements converted to btu per hour
Milliwatts Btu Per Hour
1 mW 0.003412 Btu/h
2 mW 0.006824 Btu/h
3 mW 0.010236 Btu/h
4 mW 0.013649 Btu/h
5 mW 0.017061 Btu/h
6 mW 0.020473 Btu/h
7 mW 0.023885 Btu/h
8 mW 0.027297 Btu/h
9 mW 0.030709 Btu/h
10 mW 0.034121 Btu/h
20 mW 0.068243 Btu/h
30 mW 0.102364 Btu/h
40 mW 0.136486 Btu/h
50 mW 0.170607 Btu/h
60 mW 0.204729 Btu/h
70 mW 0.23885 Btu/h
80 mW 0.272971 Btu/h
90 mW 0.307093 Btu/h
100 mW 0.341214 Btu/h
200 mW 0.682428 Btu/h
300 mW 1.0236 Btu/h
400 mW 1.3649 Btu/h
500 mW 1.7061 Btu/h
600 mW 2.0473 Btu/h
700 mW 2.3885 Btu/h
800 mW 2.7297 Btu/h
900 mW 3.0709 Btu/h
1,000 mW 3.4121 Btu/h

More Milliwatt & Btu Per Hour Conversions