Convert Milliwatts to BTU per Hour
Convert Milliwatts (mW) to BTU per Hour (BTU/h) instantly and accurately.
Conversion Formula
BTU/h = mW × 0.003412141633
About Milliwatts
A milliwatt (mW) is 10⁻³ W - the power scale of consumer wireless communications. Wi-Fi access points transmit at 100 mW (20 dBm); mobile phones peak at up to 1,000 mW. A laser pointer emits 1-5 mW; an LED indicator 10 mW; Bluetooth Classic peaks at 100 mW. Standby power implications: 1 mW × 10⁹ devices × 1 year = 8,760 MWh - enough to power a small town, underscoring why milliwatt standby matters at scale. 1 mW = 10⁻³ W.
About BTU per Hour
One BTU per hour (BTU/h) ≈ 0.2931 W - the dominant HVAC capacity unit in the US and Canada. Room air conditioners are universally rated in BTU/h: 12,000 BTU/h = 1 ton of refrigeration = 3,517 W. Home furnaces range from 40,000-150,000 BTU/h. Office building cooling demand is calculated in BTU/h per ft². Engineers convert: BTU/h × 0.2931 = W; or W × 3.412 = BTU/h. 1 BTU/h = 0.29307 W.
Quick Reference Table
| Milliwatts (mW) | BTU per Hour (BTU/h) |
|---|---|
| 1 mW | 0.00341214 BTU/h |
| 2 mW | 0.00682428 BTU/h |
| 5 mW | 0.0170607 BTU/h |
| 10 mW | 0.0341214 BTU/h |
| 25 mW | 0.0853035 BTU/h |
| 50 mW | 0.170607 BTU/h |
| 100 mW | 0.341214 BTU/h |