BTU per Hour (IT) to Milliwatt Converter
Power · unit-converter
Convert BTU per Hour (IT) to Milliwatt with a fixed input and output unit, step-by-step formula line, and reference tables. Linear units use SI watt definitions; mechanical hp uses 550 ft·lbf/s; BTU/h uses the IT BTU; dBm/dBW are logarithmic relative to 1 mW and 1 W. The full Power Converter also includes PS/CV, TR, kVA/MVA, and ft·lb/s.
Calculator
From: BTU per Hour (IT) (btu_hr)
To: Milliwatt (mw)
About BTU per Hour (IT)
BTU per hour expresses thermal power using the IT British thermal unit (≈ 1,055.056 J per BTU), divided by one hour. Common in HVAC equipment ratings.
About Milliwatt
One milliwatt is one thousandth of a watt. Common in RF, fiber optics, and low-power electronics.
How to convert btu per hour (it) to milliwatts
1 btu per hour (it) is equal to 293.07107017222222 milliwatt when both are expressed in watt-equivalents:
1 btu_hr = (0.2930710701722222 W ÷ 0.001 W) mw = 293.07107017222222 mw
Each btu per hour (it) is defined as 0.2930710701722222 W and each milliwatt as 0.001 W in this tool, so one btu_hr equals 0.2930710701722222 ÷ 0.001 mw = 293.07107017222222 mw.
Let d(btu_hr) be the numeric value in BTU per Hour (IT) (btu_hr), and d(mw) the value in Milliwatt (mw). Then:
d(mw) = d(btu_hr) × (0.2930710701722222 / 0.001)
Equivalently, divide by how many btu_hr fit into one mw (watts per mw divided by watts per btu_hr):
d(mw) = d(btu_hr) ÷ 0.00341214163313
Or: milliwatt = btu per hour (it) ÷ 0.00341214163313
Examples
Example #1: Convert 1 btu_hr to milliwatt
1 btu_hr = 1 btu_hr × (0.2930710701722222/0.001) mw = 293.071070172 mw
1 btu_hr = 1 btu_hr ÷ 0.00341214163313 = 293.071070172 mw
Intermediate watts: 0.2930710702 W
Example #2: Convert 10 btu_hr to milliwatt
10 btu_hr = 10 btu_hr × (0.2930710701722222/0.001) mw = 2930.71070172 mw
10 btu_hr = 10 btu_hr ÷ 0.00341214163313 = 2930.71070172 mw
Intermediate watts: 2.9307107017 W
Summary
To convert BTU per Hour (IT) to Milliwatt, multiply the value in btu_hr by the ratio of watts per btu_hr divided by watts per mw. Equivalently: value_mw = value_btu_hr × (0.2930710701722222 / 0.001). Numerically, 1 btu_hr equals 293.0710701722222 mw.
Relationship context
You are converting between thermal engineering rates (BTU/h, kcal/h) (BTU per Hour (IT)) and SI / decimal power (watts and prefixes) (Milliwatts). All linear values are mapped through watts first. The numeric factor is 2.930711e+2.
Conversion tables
| BTU per Hour (IT) (btu_hr) | Milliwatt (mw) |
|---|---|
| 0.1 | 29.3071070172 |
| 1 | 293.071070172 |
| 2 | 586.142140344 |
| 3 | 879.213210517 |
| 4 | 1,172.28428069 |
| 5 | 1,465.35535086 |
| 6 | 1,758.42642103 |
| 7 | 2,051.49749121 |
| 8 | 2,344.56856138 |
| 9 | 2,637.63963155 |
| BTU per Hour (IT) (btu_hr) | Milliwatt (mw) |
|---|---|
| 10 | 2,930.71070172 |
| 20 | 5,861.42140344 |
| 30 | 8,792.13210517 |
| 40 | 11,722.8428069 |
| 50 | 14,653.5535086 |
| 60 | 17,584.2642103 |
| 70 | 20,514.9749121 |
| 80 | 23,445.6856138 |
| 90 | 26,376.3963155 |
| 100 | 29,307.1070172 |