Convert Kilojoules per Kilogram per Kelvin to Calories (IT) per Gram per °C
Kilojoule per Kilogram per Kelvin (kJ/(kg·K)) to Calorie (IT) per Gram per °C (cal/(g·°C)) specific heat capacity conversion — enter any value below to get an instant result, or use the table for common values.
Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.
Result
1 kJ/(kg·K) = 0.2388459 cal/(g·°C)
1 Kilojoule per Kilogram per Kelvin = 0.2388459 Calories (IT) per Gram per °C
1 Calorie (IT) per Gram per °C = 4.1868 Kilojoules per Kilogram per Kelvin
1 kJ/(kg·K) in every supported unit
Conversion chart: Kilojoule per Kilogram per Kelvin to Calories (IT) per Gram per °C
Conversion table
| Kilojoule per Kilogram per Kelvin (kJ/(kg·K)) | Calorie (IT) per Gram per °C (cal/(g·°C)) |
|---|---|
| 0.01 kJ/(kg·K) | 0.002388459 cal/(g·°C) |
| 0.1 kJ/(kg·K) | 0.02388459 cal/(g·°C) |
| 1 kJ/(kg·K) | 0.2388459 cal/(g·°C) |
| 2 kJ/(kg·K) | 0.47769179 cal/(g·°C) |
| 3 kJ/(kg·K) | 0.71653769 cal/(g·°C) |
| 5 kJ/(kg·K) | 1.1942295 cal/(g·°C) |
| 10 kJ/(kg·K) | 2.388459 cal/(g·°C) |
| 20 kJ/(kg·K) | 4.7769179 cal/(g·°C) |
| 50 kJ/(kg·K) | 11.942295 cal/(g·°C) |
| 100 kJ/(kg·K) | 23.88459 cal/(g·°C) |
| 1000 kJ/(kg·K) | 238.8459 cal/(g·°C) |
Kilojoule per Kilogram per Kelvin (kJ/(kg·K))
Definition: A more practically sized specific heat capacity unit, since raw joule figures for real materials (water is about 4,186 J/(kg·K)) run inconveniently large.
History: A natural SI multiple of joule per kilogram per kelvin, adopted once engineering tables needed heat-capacity figures in a friendlier one-to-four-digit range.
Current use: Common in mechanical and chemical engineering reference tables and process design calculations for the specific heat of fuels, coolants, and industrial fluids.
Calorie (IT) per Gram per °C (cal/(g·°C))
Definition: The classic calorimetry unit — the calorie was originally DEFINED as the energy needed to raise one gram of water by one degree Celsius, making water's specific heat capacity almost exactly 1 cal/(g·°C) by construction.
History: Rooted in 19th-century calorimetry experiments that established the calorie as a heat-energy unit directly tied to water's thermal behavior, later refined into the precisely defined International Table calorie.
Current use: Still widely used in chemistry, nutrition science, and everyday explanations of heat capacity, precisely because water's value of very nearly 1 makes the unit intuitive to work with.
Supported Units
| Unit | Symbol | In J/(kg·K) |
|---|---|---|
| Joule per Kilogram per Kelvin | J/(kg·K) | 1 J/(kg·K) |
| Kilojoule per Kilogram per Kelvin | kJ/(kg·K) | 1000 J/(kg·K) |
| Joule per Gram per °C | J/(g·°C) | 1000 J/(kg·K) |
| Calorie (IT) per Gram per °C | cal/(g·°C) | 4186.8 J/(kg·K) |
| Kilocalorie (IT) per Kilogram per °C | kcal/(kg·°C) | 4186.8 J/(kg·K) |
| Btu (IT) per Pound per °F | Btu/(lb·°F) | 4186.8 J/(kg·K) |
| Btu (IT) per Pound per °C | Btu/(lb·°C) | 2326 J/(kg·K) |
| Kilogram-force Meter per Kilogram per Kelvin | kgf·m/(kg·K) | 9.80665 J/(kg·K) |
| Pound-force Foot per Pound per °R | lbf·ft/(lb·°R) | 5.3803205 J/(kg·K) |
About These Parameters
- Value
- The specific heat capacity value you want to convert, expressed in the "From" unit. Accepts decimals.
- From Unit
- The unit your input value is currently measured in — a chemistry reference's cal/(g·°C), or a US engineering datasheet's Btu/(lb·°F).
- To Unit
- The unit you want the result converted into. Use the swap button to flip From and To instantly.
How Specific Heat Capacity Conversion Works
The Formula
Every unit here is defined by a fixed multiplier relative to joules per kilogram per kelvin. To convert a value from one unit to another:
result = value × (factor of "From" unit ÷ factor of "To" unit)
For Kilojoule per Kilogram per Kelvin → Calorie (IT) per Gram per °C: multiply by 0.2388459. For example, 1 kJ/(kg·K) × 0.2388459 = 0.2388459 cal/(g·°C).
Q = mcΔT
Specific heat capacity (c) is the key figure in the fundamental heat-energy equation Q = mcΔT — the heat energy Q needed equals mass (m) times specific heat capacity (c) times the temperature change (ΔT). This is the formula behind everything from calculating how much energy it takes to boil a kettle of water to sizing an industrial heat exchanger.
Why Water Is the Reference Point
Water has an unusually high specific heat capacity (about 4,186 J/(kg·K), or almost exactly 1 cal/(g·°C) by the calorie's original definition) compared to most other everyday materials — metals typically sit between 100 and 900 J/(kg·K). This is why large bodies of water moderate coastal climates, why water is used as a coolant in engines and power plants, and why the calorie and Btu, both originally water-based reference units, come out so close to a value of 1 on this page's water-referenced units.
Example
A specific heat capacity of 1 kJ/(kg·K) equals 0.2388459 cal/(g·°C). For scale, water's specific heat capacity is about 4,186 J/(kg·K) (1 cal/(g·°C)), while aluminum's is about 897 J/(kg·K) — meaning it takes roughly 4.7 times more energy to heat a kilogram of water by one degree than the same mass of aluminum.
Frequently Asked Questions
How many Calories (IT) per Gram per °C are in 1 Kilojoule per Kilogram per Kelvin?
1 Kilojoule per Kilogram per Kelvin (kJ/(kg·K)) equals exactly 0.2388459 Calories (IT) per Gram per °C (cal/(g·°C)).
Why is water's specific heat capacity almost exactly 1 cal/(g·°C)?
It's not a coincidence — the calorie was originally DEFINED in the 19th century as the energy needed to raise one gram of water by one degree Celsius. The modern International Table calorie is now fixed to a precise joule value rather than redefined by experiment each time, which is why the figure comes out extremely close to, but not perfectly, 1.
What's the difference between specific heat capacity and heat capacity?
Specific heat capacity is a per-unit-mass property of a substance (energy per kg per degree), independent of how much of the substance you have. Heat capacity (without "specific") is the total energy needed to heat a particular object or quantity by one degree, found by multiplying specific heat capacity by the actual mass involved.
How accurate are these conversions?
Every conversion factor used here is the exact, internationally recognized relationship between the underlying energy, mass, and temperature units (e.g. 1 cal (IT) = exactly 4.1868 joules) — results are limited only by floating-point display precision, not by rounded conversion constants.