Convert BTU per Hour to Milliwatts
Convert BTU per Hour (BTU/h) to Milliwatts (mW) instantly and accurately.
Conversion Formula
mW = BTU/h × 293.0710702
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.
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.
Quick Reference Table
| BTU per Hour (BTU/h) | Milliwatts (mW) |
|---|---|
| 1 BTU/h | 293.071 mW |
| 2 BTU/h | 586.142 mW |
| 5 BTU/h | 1465.36 mW |
| 10 BTU/h | 2930.71 mW |
| 25 BTU/h | 7326.78 mW |
| 50 BTU/h | 14653.6 mW |
| 100 BTU/h | 29307.1 mW |