Watt-hours (W·h) to Ergs (erg) Conversion
Watt-hours
The watt-hour (W·h) is a unit of energy equal to exactly 3,600 joules, defined as the energy consumed by a one-watt device operating for one hour. It is used in electrical engineering and consumer electronics for expressing battery capacities: a smartphone battery typically holds 10–20 Wh. In aviation, aircraft battery capacities are specified in watt-hours for international transport regulations (lithium batteries above 100 Wh face restrictions).
Ergs
The erg is a unit of energy in the CGS (centimetre-gram-second) system, equal to exactly 10⁻⁷ joules. The word derives from the Greek ergon (work). Though largely superseded by the joule in modern science, the erg persists in astrophysics — stellar luminosities and gamma-ray burst energies are sometimes expressed in ergs — and in classical physics texts. One erg is approximately the energy required to move a mosquito by 1 cm. The total energy released by the Sun per second is approximately 3.8 × 10³³ ergs.
| Watt-hours (W·h) | Ergs (erg) |
|---|---|
| 0.1 W·h | 3600000000 erg |
| 1 W·h | 36000000000 erg |
| 2 W·h | 72000000000 erg |
| 3 W·h | 108000000000 erg |
| 5 W·h | 180000000000 erg |
| 10 W·h | 360000000000 erg |
| 20 W·h | 720000000000 erg |
| 30 W·h | 1080000000000 erg |
| 50 W·h | 1800000000000 erg |
| 100 W·h | 3600000000000 erg |
| 1000 W·h | 36000000000000 erg |