Hectojoule is 100 joule units.
Hectojoules to Ergs Converter — hJ to erg
Convert Hectojoule (hJ) to Erg (erg) using the exact conversion factor (1 hectojoule = 1,000,000,000 erg). See the formula, worked examples, and conversion table.
Hectojoules to Ergs converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is a CGS energy unit.
Result = input x 100 / 1e-7.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Hectojoules to Ergs
Hectojoule and Erg both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Hectojoule is 100 joule units, and an erg is a CGS energy unit.
Formula
ergs = hectojoules × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 hectojoule equals 100 base units, and 1 erg equals 1e-7 base units, so dividing one by the other gives the direct hectojoule-to-erg factor of 1000000000.
Simple example
1 hJ × 1000000000 = 1,000,000,000 erg
1 hectojoule = 1,000,000,000 ergs.
Real-world example
100 hJ × 1000000000 = 100,000,000,000 erg
100 hectojoules = 100,000,000,000 ergs.
Conversion table
| Hectojoule (hJ) | Erg (erg) |
|---|---|
| 1 hJ | 1,000,000,000 erg |
| 10 hJ | 10,000,000,000 erg |
| 100 hJ | 100,000,000,000 erg |
| 500 hJ | 500,000,000,000 erg |
| 1,000 hJ | 1e+12 erg |
| 2,000 hJ | 2e+12 erg |
Reverse conversion: Erg to Hectojoule
1 erg × 1e-9 = 1e-9 hJ
1 erg = 1e-9 hectojoules.
hectojoules = ergs × 1e-9
For a page dedicated to this direction, see Erg to Hectojoule.
Understanding the Hectojoule (hJ)
Hectojoule is 100 joule units.
Understanding the Erg (erg)
An erg is a CGS energy unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ergs are in 1 hectojoule?
1 hectojoule equals 1,000,000,000 ergs, using the exact defined conversion factor rather than an estimate.
How do I convert hectojoule to erg?
Multiply the hectojoule value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert erg back to hectojoule?
Use the reverse factor: 1 erg equals 1e-9 hectojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectojoule?
Hectojoule (hJ) is a unit of energy.
What is a erg?
Erg (erg) is a unit of energy.
Is the hectojoule to erg conversion exact?
Yes. Both hectojoule and erg are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.