A kilocalorie is 1,000 calories.
Kilocalories to Ergs Converter — kcal to erg
Convert Kilocalorie (kcal) to Erg (erg) using the exact conversion factor (1 kilocalorie = 41,840,000,000 erg). See the formula, worked examples, and conversion table.
Kilocalories 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 4184 / 1e-7.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilocalories to Ergs
Kilocalorie and Erg both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: A kilocalorie is 1,000 calories, and an erg is a CGS energy unit.
Formula
ergs = kilocalories × 41840000000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilocalorie equals 4184 base units, and 1 erg equals 1e-7 base units, so dividing one by the other gives the direct kilocalorie-to-erg factor of 41840000000.
Simple example
1 kcal × 41840000000 = 41,840,000,000 erg
1 kilocalorie = 41,840,000,000 ergs.
Real-world example
100 kcal × 41840000000 = 4.184e+12 erg
100 kilocalories = 4.184e+12 ergs.
Conversion table
| Kilocalorie (kcal) | Erg (erg) |
|---|---|
| 1 kcal | 41,840,000,000 erg |
| 10 kcal | 418,400,000,000 erg |
| 100 kcal | 4.184e+12 erg |
| 500 kcal | 2.092e+13 erg |
| 1,000 kcal | 4.184e+13 erg |
| 2,000 kcal | 8.368e+13 erg |
Reverse conversion: Erg to Kilocalorie
1 erg × 2.390057e-11 = 2.390057e-11 kcal
1 erg = 2.390057e-11 kilocalories.
kilocalories = ergs × 2.390057e-11
For a page dedicated to this direction, see Erg to Kilocalorie.
Understanding the Kilocalorie (kcal)
A kilocalorie is 1,000 calories.
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 kilocalorie?
1 kilocalorie equals 41,840,000,000 ergs, using the exact defined conversion factor rather than an estimate.
How do I convert kilocalorie to erg?
Multiply the kilocalorie value by 41840000000. The converter above does this instantly to whatever precision you set.
How do I convert erg back to kilocalorie?
Use the reverse factor: 1 erg equals 2.390057e-11 kilocalories. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilocalorie?
Kilocalorie (kcal) is a unit of energy.
What is a erg?
Erg (erg) is a unit of energy.
Is the kilocalorie to erg conversion exact?
Yes. Both kilocalorie and erg are defined by fixed standards rather than physical artifacts, so the factor of 41840000000 used above is exact to as many digits as you choose to display.