Convert kilocalories to gigajoules
1 kcal = 0.000004184 GJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 004 184GJ
Exact decimal: 0.000004184
As a fraction: 523/125000000
1 kcal = 0.000004184 GJ
How to convert kilocalories to gigajoules
Multiply the number of kilocalories by 0.000004184 to get gigajoules.
The exact factor is 0.000004184 — as a fraction, 523/125000000.
Kilocalorie: The Calorie on food labels — 1000 small calories.
Kilocalorie to Gigajoule conversion table
| Kilocalories (kcal) | Gigajoules (GJ) |
|---|---|
| 1 kcal | 0.000 004 184 |
| 2 kcal | 0.000 008 368 |
| 3 kcal | 0.000 012 552 |
| 5 kcal | 0.000 020 92 |
| 10 kcal | 0.000 041 84 |
| 20 kcal | 0.000 083 68 |
| 25 kcal | 0.000 104 6 |
| 50 kcal | 0.000 209 2 |
| 100 kcal | 0.000 418 4 |
| 250 kcal | 0.001 046 |
| 500 kcal | 0.002 092 |
| 1000 kcal | 0.004 184 |
Gigajoule to Kilocalorie conversion table
| Gigajoules (GJ) | Kilocalories (kcal) |
|---|---|
| 1 GJ | 239 005.74 |
| 2 GJ | 478 011.47 |
| 3 GJ | 717 017.21 |
| 5 GJ | 1 195 028.7 |
| 10 GJ | 2 390 057.4 |
| 20 GJ | 4 780 114.7 |
| 25 GJ | 5 975 143.4 |
| 50 GJ | 11 950 287 |
| 100 GJ | 23 900 574 |
| 250 GJ | 59 751 434 |
| 500 GJ | 119 502 870 |
| 1000 GJ | 239 005 740 |
Frequently asked
How many gigajoules are in a kilocalorie?
One kilocalorie equals 0.000004184 gigajoules (kcal → GJ). That figure is exact, not rounded.
How do you convert kilocalories to gigajoules?
Multiply the number of kilocalories by 0.000004184 to get gigajoules.
What is 1 GJ in kilocalories?
One gigajoule is 239005.7361 kilocalories.
What is 10 kcal in GJ?
10 kcal = 0.000 041 84 GJ.
What exactly is a kilocalorie?
The Calorie on food labels — 1000 small calories.