Convert Kilocalorie (kcal) to Joule (J)
Category: Energy
1 kcal = 4184 j
Precision: 6 decimals; very small non-zero results use significant digits.
How to convert kilocalorie (kcal) to joule (j)
Energy is the capacity to do work. Joules form the SI base; Wh/kWh align with metering and batteries; calories and BTU survive in nutrition and HVAC. Conversions bridge mechanical, thermal, and electrical perspectives.
Share this conversion:
/convert/kilocalorie-to-joule
Quick conversion table
Handy values for Kilocalorie (kcal) to Joule (J). Click a value to calculate that result.
| Kilocalorie (kcal) | Joule (J) |
|---|---|
| 4184 | |
| 2092 | |
| 10460 | |
| 41840 |
Conversion formula
Use the following formula:
Joule (J) ≈ Kilocalorie (kcal) × 4184
Convert energy from Kilocalorie (kcal) to Joule (J) using a fixed unit ratio. Round only the final result.
Common mistakes
- Confusing calorie (cal) with kilocalorie (kcal) on nutrition labels.
- Treating BTU definitions interchangeably without noting standard (IT vs other).
Unit facts
- Kilocalorie (kcal): A kilocalorie (kcal) equals 4,184 J; standard on food labels.
- Joule (J): Joule (J) is the SI unit of energy: 1 J = 1 N·m = 1 kg·m²/s².
About Kilocalorie (kcal)
Kilocalorie (kcal)
Equals 1,000 cal; labeled as ‘Calorie’ on food packaging. Converts to joules for scientific comparisons.
History: Nutrition science standardized kcal for daily intake guidelines and labels.
About Joule (J)
Joule (J)
SI energy unit equal to N·m. Fundamental in physics, electronics (J = W·s), and thermodynamics.
History: Named after James P. Joule. Became universal with SI coherence across mechanical and electrical domains.