Joules to ergs
Type a value in joules to see it in ergs straight away, or type in the second box to convert back.
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How to use it
- Type the value in the joules box.
- Read the result in ergs as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
erg = J × 10,000,000
Multiply the value in joules by 10,000,000 to get ergs.
Example
To convert 25 J to ergs: 25 × 10,000,000 = 250,000,000 erg.
Conversion table
| Joules (J) | Ergs (erg) |
|---|---|
| 1 | 10,000,000 |
| 2 | 20,000,000 |
| 3 | 30,000,000 |
| 5 | 50,000,000 |
| 10 | 100,000,000 |
| 20 | 200,000,000 |
| 25 | 250,000,000 |
| 50 | 500,000,000 |
| 100 | 1,000,000,000 |
| 250 | 2,500,000,000 |
| 500 | 5,000,000,000 |
| 1,000 | 10,000,000,000 |
About the units
- Joule
- The SI unit of energy, equal to the work done by a force of one newton moving an object one meter.
- Erg
- The energy unit of the centimeter gram second system, exactly 10⁻⁷ joules.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many ergs are in one joule?
1 J = 10,000,000 erg exactly.
How do I convert joules to ergs?
Use erg = J × 10,000,000. For example, 25 J = 250,000,000 erg.
How many joules are in one erg?
1 erg = 1e-7 J.
Which calorie do these converters use?
The thermochemical calorie, exactly 4.184 joules, the factor many countries use to turn kcal into kJ on food labels. The International Table calorie is 4.1868 joules, less than 0.07% larger.
What is the difference between kW and kWh?
A kilowatt is a unit of power, the rate of using energy, while a kilowatt-hour is an amount of energy. A 2 kW heater running for three hours uses 6 kWh.