Terajoule is 1000000000000 joule units.
Terajoules to Kilocalories Converter — TJ to kcal
Convert Terajoule (TJ) to Kilocalorie (kcal) using the exact conversion factor (1 terajoule = 239,005,736.1 kilocalorie). See the formula, worked examples, and conversion table.
Terajoules to Kilocalories converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie is 1,000 calories.
Result = input x 1e+12 / 4184.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Terajoules to Kilocalories
Terajoule and Kilocalorie both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Terajoule is 1000000000000 joule units, and a kilocalorie is 1,000 calories.
Formula
kilocalories = terajoules × 239005736.138
This factor comes from each unit's defined relationship to the category's base unit: 1 terajoule equals 1e+12 base units, and 1 kilocalorie equals 4184 base units, so dividing one by the other gives the direct terajoule-to-kilocalorie factor of 239005736.138.
Simple example
1 TJ × 239005736.1 = 239,005,736.1 kcal
1 terajoule = 239,005,736.1 kilocalories.
Real-world example
100 TJ × 239005736.1 = 23,900,573,610 kcal
100 terajoules = 23,900,573,610 kilocalories.
Conversion table
| Terajoule (TJ) | Kilocalorie (kcal) |
|---|---|
| 1 TJ | 239,005,736.1 kcal |
| 10 TJ | 2,390,057,361 kcal |
| 50 TJ | 11,950,286,810 kcal |
| 100 TJ | 23,900,573,610 kcal |
| 500 TJ | 119,502,868,100 kcal |
| 1,000 TJ | 239,005,736,100 kcal |
Reverse conversion: Kilocalorie to Terajoule
1 kcal × 4.184e-9 = 4.184e-9 TJ
1 kilocalorie = 4.184e-9 terajoules.
terajoules = kilocalories × 4.184e-9
For a page dedicated to this direction, see Kilocalorie to Terajoule.
Understanding the Terajoule (TJ)
Terajoule is 1000000000000 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 terajoule?
1 terajoule equals 239,005,736.1 kilocalories, using the exact defined conversion factor rather than an estimate.
How do I convert terajoule to kilocalorie?
Multiply the terajoule value by 239005736.1. The converter above does this instantly to whatever precision you set.
How do I convert kilocalorie back to terajoule?
Use the reverse factor: 1 kilocalorie equals 4.184e-9 terajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a terajoule?
Terajoule (TJ) is a unit of engineering.
What is a kilocalorie?
Kilocalorie (kcal) is a unit of engineering.
Is the terajoule to kilocalorie conversion exact?
Yes. Both terajoule and kilocalorie are defined by fixed standards rather than physical artifacts, so the factor of 239005736.1 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.