Convert Milliwatts to BTU per Second
Convert Milliwatts (mW) to BTU per Second (BTU/s) instantly and accurately.
Conversion Formula
BTU/s = mW × 9.478171203e-7
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 Second
One BTU per second (BTU/s) ≈ 1,055 W - close to 1 kW but slightly larger. Used when heat rates are so high that per-hour or per-minute numbers become unwieldy. In fire protection engineering, large house fires peak at 500-2,000 BTU/s; industrial fires at millions of BTU/s. Blast characterisation for petrochemical safety and large industrial heat exchangers with duties of millions of BTU/h are conveniently expressed in BTU/s. Since 1 BTU/s ≈ 1.055 kW, conversion to SI is straightforward. 1 BTU/s = 1,055.056 W.
Quick Reference Table
| Milliwatts (mW) | BTU per Second (BTU/s) |
|---|---|
| 1 mW | 9.478 × 10-7 BTU/s |
| 2 mW | 1.896 × 10-6 BTU/s |
| 5 mW | 4.739 × 10-6 BTU/s |
| 10 mW | 9.478 × 10-6 BTU/s |
| 25 mW | 2.37 × 10-5 BTU/s |
| 50 mW | 4.739 × 10-5 BTU/s |
| 100 mW | 9.478 × 10-5 BTU/s |