Kilocalorie (thermochemical) (kcal)
Exactly 1000 thermochemical calories (4184 joules).
What is a kilocalorie?
- Symbol
- kcal
- Quantity
- Energy
- Unit system
- metric
- Definition
- Exactly 1000 thermochemical calories (4184 joules).
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
The food "Calorie" on nutrition labels and in diet planning.
Kilocalorie (thermochemical) in other energy units
- 1 kcal = 4184 JJoule
- 1 kcal = 4.184 kJKilocalorie (thermochemical) to Kilojoule converter
- 1 kcal = 0.004184 MJMegajoule
- 1 kcal ≈ 1.162222222 WhWatt-hour
- 1 kcal ≈ 0.001162222222 kWhKilowatt-hour
- 1 kcal = 1000 calCalorie (thermochemical)
- 1 kcal ≈ 3.965666831 BTUBritish thermal unit (IT)
- 1 kcal ≈ 3085.960033 ft·lbfFoot-pound-force
- 1 kcal ≈ 2.611447397e+22 eVElectronvolt
- 1 kcal = 41840000000 ergErg
Kilocalorie (thermochemical) quick reference
| Kilocalorie (thermochemical) | Kilojoule | Joule | Megajoule |
|---|---|---|---|
| 1 kcal | = 4.184 kJ | = 4184 J | = 0.004184 MJ |
| 10 kcal | = 41.84 kJ | = 41840 J | = 0.04184 MJ |
| 100 kcal | = 418.4 kJ | = 418400 J | = 0.4184 MJ |
| 1000 kcal | = 4184 kJ | = 4184000 J | = 4.184 MJ |
Where the kilocalorie fits
The next smaller energy unit is the watt-hour (Wh). 1 kcal ≈ 1.162222222 Wh, and 1 Wh ≈ 0.8604206501 kcal.
The next larger energy unit is the megajoule (MJ). 1 kcal = 0.004184 MJ, and 1 MJ ≈ 239.0057361 kcal.
Frequently asked questions
- How many kilojoules are in one kilocalorie?
- One kilocalorie = 4.184 kJ (kilojoules).
- How many joules are in one kilocalorie?
- One kilocalorie = 4184 J (joules).
- How many megajoules are in one kilocalorie?
- One kilocalorie = 0.004184 MJ (megajoules).