Convert Kilocalories to Ergs
1 kilocalorie (kcal) equals 41840000000 ergs (erg).
1 kcal = 41840000000 erg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilocalorie to erg converter to paste a column from Excel.
How to Convert Kilocalorie to Erg
- 1 kcal = 41840000000 erg
- 1 erg = 2.390057361 × 10⁻¹¹ kcal
- Example: convert 15 kcal to erg: 15 kcal = 15 × 41840000000 erg = 627600000000 erg
Reference conditions. kcal: Thermochemical kilocalorie (food Calorie), 4184 J exactly.
Formula
erg = kcal × 41840000000
Derivation from SI units:
- 1 kcal = 1000 cal = 4184 J (exact)
- 1 erg = 1 dyn·cm = 10⁻⁷ J
- 1 kcal = 4184 J ÷ 1 × 10⁻⁷ J per erg = 41840000000 erg
Both units are defined exactly, so the factor is exact. Kilocalorie definition: kilocalorie; Erg definition: erg.
Worked examples
- A reading of 200 kcal converts to 8368000000000 erg.
200 kcal × 41840000000 = 8368000000000 erg - A value of 1500 kcal is 62760000000000 erg.
1500 kcal × 41840000000 = 62760000000000 erg
Kilocalorie to Erg conversion table
| Kilocalories (kcal) | Ergs (erg) |
|---|---|
| 1 kcal | 41840000000 erg |
| 50 kcal | 2092000000000 erg |
| 100 kcal | 4184000000000 erg |
| 150 kcal | 6276000000000 erg |
| 200 kcal | 8368000000000 erg |
| 250 kcal | 10460000000000 erg |
| 300 kcal | 12552000000000 erg |
| 500 kcal | 20920000000000 erg |
| 1000 kcal | 41840000000000 erg |
| 1500 kcal | 62760000000000 erg |
| 2000 kcal | 83680000000000 erg |
| 2500 kcal | 104600000000000 erg |
| 3000 kcal | 125520000000000 erg |
| 3500 kcal | 146440000000000 erg |
Where it's used
Kilocalories are used for food and diet energy (2000 kcal reference intake), while ergs appear in astrophysics (luminosities in erg/s). Both measure energy, work and heat, so the conversion is a fixed factor.
Kilocalorie to other energy units
| Conversion | 1 kcal equals |
|---|---|
| kilocalorie to joule | 4184 J |
| kilocalorie to kilojoule | 4.184 kJ |
| kilocalorie to megajoule | 0.004184 MJ |
| kilocalorie to calorie | 1000 cal |
| kilocalorie to watt-hour | 1.162222222 Wh |
| kilocalorie to kilowatt-hour | 0.001162222222 kWh |
| kilocalorie to BTU | 3.965666831 BTU |
| kilocalorie to therm | 0.00003966613703 thm |
| kilocalorie to electronvolt | 2.611447397 × 10²² eV |
| kilocalorie to foot-pound | 3085.960033 ft·lbf |
| kilocalorie to erg | 41840000000 erg |
Frequently asked questions
How many ergs are in 1 kilocalorie?
1 kcal = 41840000000 erg.
How do I convert kilocalories to ergs?
Multiply the value in kcal by 41840000000. For example, 15 kcal × 41840000000 = 627600000000 erg.
Is the kcal to erg conversion exact?
Yes. Both units are defined exactly, and 1 kcal is exactly 41840000000 erg.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilocalorie (thermochemical)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "erg (erg)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilocalories to Ergs. Retrieved October 17, 2026, from https://scientificconverters.com/energy/kilocalories-to-ergs/
IEEE
Scientific Converters, "Convert Kilocalories to Ergs," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/energy/kilocalories-to-ergs/