Milliwatt to BTU per Hour (IT) Converter
Power · unit-converter
Convert Milliwatt to BTU per Hour (IT) 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: Milliwatt (mw)
To: BTU per Hour (IT) (btu_hr)
About Milliwatt
One milliwatt is one thousandth of a watt. Common in RF, fiber optics, and low-power electronics.
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.
How to convert milliwatts to btu per hour (it)
1 milliwatt is equal to 0.00341214163313 btu per hour (it) when both are expressed in watt-equivalents:
1 mw = (0.001 W ÷ 0.2930710701722222 W) btu_hr = 0.00341214163313 btu_hr
Each milliwatt is defined as 0.001 W and each btu per hour (it) as 0.2930710701722222 W in this tool, so one mw equals 0.001 ÷ 0.2930710701722222 btu_hr = 0.00341214163313 btu_hr.
Let d(mw) be the numeric value in Milliwatt (mw), and d(btu_hr) the value in BTU per Hour (IT) (btu_hr). Then:
d(btu_hr) = d(mw) × (0.001 / 0.2930710701722222)
Equivalently, divide by how many mw fit into one btu_hr (watts per btu_hr divided by watts per mw):
d(btu_hr) = d(mw) ÷ 293.07107017222222
Or: btu per hour (it) = milliwatt ÷ 293.07107017222222
Examples
Example #1: Convert 1 mw to btu per hour (it)
1 mw = 1 mw × (0.001/0.2930710701722222) btu_hr = 0.0034121416 btu_hr
1 mw = 1 mw ÷ 293.07107017222222 = 0.0034121416 btu_hr
Intermediate watts: 0.001 W
Example #2: Convert 10 mw to btu per hour (it)
10 mw = 10 mw × (0.001/0.2930710701722222) btu_hr = 0.0341214163 btu_hr
10 mw = 10 mw ÷ 293.07107017222222 = 0.0341214163 btu_hr
Intermediate watts: 0.01 W
Summary
To convert Milliwatt to BTU per Hour (IT), multiply the value in mw by the ratio of watts per mw divided by watts per btu_hr. Equivalently: value_btu_hr = value_mw × (0.001 / 0.2930710701722222). Numerically, 1 mw equals 0.003412141633127942 btu_hr.
Relationship context
You are converting between SI / decimal power (watts and prefixes) (Milliwatts) and thermal engineering rates (BTU/h, kcal/h) (BTU per Hour (IT)). All linear values are mapped through watts first. The numeric factor is 3.412142e-3.
Conversion tables
| Milliwatt (mw) | BTU per Hour (IT) (btu_hr) |
|---|---|
| 0.1 | 0.0003412142 |
| 1 | 0.0034121416 |
| 2 | 0.0068242833 |
| 3 | 0.0102364249 |
| 4 | 0.0136485665 |
| 5 | 0.0170607082 |
| 6 | 0.0204728498 |
| 7 | 0.0238849914 |
| 8 | 0.0272971331 |
| 9 | 0.0307092747 |
| Milliwatt (mw) | BTU per Hour (IT) (btu_hr) |
|---|---|
| 10 | 0.0341214163 |
| 20 | 0.0682428327 |
| 30 | 0.102364249 |
| 40 | 0.1364856653 |
| 50 | 0.1706070817 |
| 60 | 0.204728498 |
| 70 | 0.2388499143 |
| 80 | 0.2729713307 |
| 90 | 0.307092747 |
| 100 | 0.3412141633 |