Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 erg | 2.778e-17 kWh | |
| 0.01 erg | 2.778e-16 kWh | |
| 0.1 erg | 2.778e-15 kWh | |
| 1 erg | 2.778e-14 kWh | |
| 5 erg | 1.389e-13 kWh | |
| 10 erg | 2.778e-13 kWh | |
| 50 erg | 1.389e-12 kWh | |
| 100 erg | 2.778e-12 kWh | |
| 1000 erg | 2.778e-11 kWh |
Formula: Kilowatt-Hour = Erg × 2.7778e-14
Multiply any erg value by 2.7778e-14 to get kilowatt-hour.
Reverse: Erg = Kilowatt-Hour × 3.6000e13
Common erg values — factor: 1 erg = 2.7778e-14 kWh
| Erg (erg) | Kilowatt-Hour (kWh) | Context |
|---|---|---|
| 1 erg | 2.778e-14 kWh | 1 erg |
| 100 erg | 2.778e-12 kWh | 100 erg |
| 1e+04 erg | 2.778e-10 kWh | 1 mJ |
| 1e+06 erg | 2.778e-08 kWh | 100 mJ |
| 1e+07 erg | 2.778e-07 kWh | 1 J |
| 1e+08 erg | 2.778e-06 kWh | 10 J |
| 1.000e+10 erg | 0.0002778 kWh | 1 kJ |
| 1.000e+12 erg | 0.02778 kWh | 100 kJ |
| 1.000e+14 erg | 2.778 kWh | 10 MJ |
| 1.000e+17 erg | 2,778 kWh | 1 GJ |
| 1.000e+20 erg | 2.778e+06 kWh | 100 GJ |
| 1.000e+23 erg | 2.778e+09 kWh | 10 TJ |
| 1.000e+26 erg | 2.778e+12 kWh | 1 PJ |
| 1.000e+30 erg | 2.778e+16 kWh | 1 EJ |
| 1.000e+33 erg | 2.778e+19 kWh | 1 ZJ |
1 erg = 2.7778e-14 kWh. Memorize for instant estimates.
Use 2.7778e-14 as a quick mental multiplier.
Multiply result by 3.6000e13 to recover the original erg value.
Reads monthly bills and compares appliance energy use in kWh.
Sizes solar systems based on kWh consumption and production estimates.
Tracks charging cost and range efficiency in kWh per 100 km.
Measures building energy consumption and identifies savings in kWh.
Plans grid capacity, demand response, and billing in kWh and MWh.
Monitors real-time appliance consumption in kWh via smart meters.
The erg is the unit of energy in the CGS (centimeter-gram-second) system, equal to exactly 10⁻⁷ joules. It was defined by the British Association for the Advancement of Science in 1882 as the work done by a force of one dyne over one centimeter.
Ergs were widely used in 19th and early 20th century physics before SI standardization. They remain in use in astrophysics (stellar luminosities in erg/s) and some older scientific literature.
Interesting fact: The Sun radiates about 3.8 × 10³³ ergs per second. A mosquito in flight exerts about 100 ergs of energy per wingbeat. One joule = 10,000,000 ergs exactly.
The kilowatt-hour (kWh) is the commercial unit of electrical energy, equal to the energy consumed by a 1,000-watt appliance in one hour (3,600,000 joules). It became standard with the growth of the electrical grid in the late 19th century.
Electricity bills worldwide are denominated in kWh. A typical household uses 300–1,000 kWh per month. An electric car uses about 15–25 kWh per 100 km. Solar panels generate 250–400 kWh per year per panel.
Interesting fact: The average price of electricity in the US is about $0.12 per kWh. One kWh can run a 100W light bulb for 10 hours, charge a smartphone about 100 times, or power a laptop for 2-3 days.
Converting erg to kilowatt-hour is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 erg = 1.3889e-13 kWh and 10 erg = 2.7778e-13 kWh. Reverse: 1 kWh = 3.6000e13 erg. Exact factor: 1 erg = 2.7778e-14 kWh.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.