Convert Watts to Exawatts
Convert Watts (W) to Exawatts (EW) instantly and accurately.
Conversion Formula
EW = W × 1.000000000e-18
About Watts
The watt (W) is the SI unit of power - 1 J/s - named after James Watt (1736-1819). Familiar power levels: smartphone charging 5-65 W; laptop 15-100 W; microwave 700-1,200 W; electric kettle 2,000-3,000 W; human resting metabolism ~80 W; peak sprint ~2,000 W. The now-obsolete 100 W incandescent bulb is replaced by a 10-15 W LED producing the same light. In AC circuits, reactive power uses the var and apparent power the VA, both derived from watts. 1 W = 1 J/s = 1 kg·m²/s³.
About Exawatts
An exawatt (EW) is 10¹⁸ W. The Sun's total luminosity is 3.828 × 10²⁶ W = 3.828 × 10⁸ EW. Earth intercepts ~0.174 EW of solar power. Gamma-ray burst peak luminosities reach 10⁶-10¹ EW, making them the most powerful transients in the universe. Soft gamma-repeater (magnetar) giant flares briefly reach ~10⁵ EW. Proposed multi-exawatt laser projects (IZEST initiative) aim to compress kilojoules into attosecond pulses for QED vacuum physics. Global human civilisation consumes ~1.8 × 10⁻² EW (18 TW). 1 EW = 10¹⁸ W.
Quick Reference Table
| Watts (W) | Exawatts (EW) |
|---|---|
| 1 W | 1 × 10-18 EW |
| 2 W | 2 × 10-18 EW |
| 5 W | 5 × 10-18 EW |
| 10 W | 1 × 10-17 EW |
| 25 W | 2.5 × 10-17 EW |
| 50 W | 5 × 10-17 EW |
| 100 W | 1 × 10-16 EW |