Exajoule is 1000000000000000000 joule units.
Exajoules to Kilocalories Converter — EJ to kcal
Convert Exajoule (EJ) to Kilocalorie (kcal) using the exact conversion factor (1 exajoule = 2.390057e+14 kilocalorie). See the formula, worked examples, and conversion table.
Exajoules to Kilocalories 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.
A kilocalorie is 1,000 calories.
Result = input x 1e+18 / 4184.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Exajoules to Kilocalories
Exajoule and Kilocalorie both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Exajoule is 1000000000000000000 joule units, and a kilocalorie is 1,000 calories.
Formula
kilocalories = exajoules × 2.390057e+14
This factor comes from each unit's defined relationship to the category's base unit: 1 exajoule equals 1e+18 base units, and 1 kilocalorie equals 4184 base units, so dividing one by the other gives the direct exajoule-to-kilocalorie factor of 2.390057e+14.
Simple example
1 EJ × 2.390057e+14 = 2.390057e+14 kcal
1 exajoule = 2.390057e+14 kilocalories.
Real-world example
100 EJ × 2.390057e+14 = 2.390057e+16 kcal
100 exajoules = 2.390057e+16 kilocalories.
Conversion table
| Exajoule (EJ) | Kilocalorie (kcal) |
|---|---|
| 1 EJ | 2.390057e+14 kcal |
| 10 EJ | 2.390057e+15 kcal |
| 100 EJ | 2.390057e+16 kcal |
| 500 EJ | 1.195029e+17 kcal |
| 1,000 EJ | 2.390057e+17 kcal |
| 2,000 EJ | 4.780115e+17 kcal |
Reverse conversion: Kilocalorie to Exajoule
2.390057e+14 kcal × 4.184e-15 = 0.9999998488 EJ
2.390057e+14 kilocalories = 0.9999998488 exajoules.
exajoules = kilocalories × 4.184e-15
For a page dedicated to this direction, see Kilocalorie to Exajoule.
Understanding the Exajoule (EJ)
Exajoule is 1000000000000000000 joule units.
Understanding the Kilocalorie (kcal)
A kilocalorie is 1,000 calories.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilocalories are in 1 exajoule?
1 exajoule equals 2.390057e+14 kilocalories, using the exact defined conversion factor rather than an estimate.
How do I convert exajoule to kilocalorie?
Multiply the exajoule value by 2.390057e+14. The converter above does this instantly to whatever precision you set.
How do I convert kilocalorie back to exajoule?
Use the reverse factor: 1 kilocalorie equals 4.184e-15 exajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a exajoule?
Exajoule (EJ) is a unit of energy.
What is a kilocalorie?
Kilocalorie (kcal) is a unit of energy.
Is the exajoule to kilocalorie conversion exact?
Yes. Both exajoule and kilocalorie are defined by fixed standards rather than physical artifacts, so the factor of 2.390057e+14 used above is exact to as many digits as you choose to display.