Enter the energy value and select the conversion direction into the calculator to convert kcal/mol to kJ/mol, or convert kJ/mol back to kcal/mol.
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kcal/mol to kJ/mol Formula
The following formulas are used to convert between kilocalories per mole and kilojoules per mole.
kJ/mol = kcal/mol * 4.184
kcal/mol = kJ/mol / 4.184
Variables:
- kJ/mol is the energy in kilojoules per mole
- kcal/mol is the energy in kilocalories per mole
- 4.184 is the conversion factor between kilocalories and kilojoules
To convert kcal/mol to kJ/mol, multiply the value by 4.184. To convert kJ/mol to kcal/mol, divide the value by 4.184.
kcal/mol to kJ/mol Conversion Table
The table below lists several common energy values in kcal/mol together with their equivalents in kJ/mol.
| Energy in kcal/mol | Conversion Factor | Result in kJ/mol |
|---|---|---|
| 1 kcal/mol | 4.184 | 4.184 kJ/mol |
| 5 kcal/mol | 4.184 | 20.92 kJ/mol |
| 10 kcal/mol | 4.184 | 41.84 kJ/mol |
| 20 kcal/mol | 4.184 | 83.68 kJ/mol |
| 50 kcal/mol | 4.184 | 209.2 kJ/mol |
| 100 kcal/mol | 4.184 | 418.4 kJ/mol |
| 200 kcal/mol | 4.184 | 836.8 kJ/mol |
In practice, chemistry and thermodynamics references may report energy values in either kcal/mol or kJ/mol. Since the only difference is the constant factor of 4.184, converting between the two is straightforward.
What is kcal/mol to kJ/mol Conversion?
This conversion changes an energy value from kilocalories per mole (kcal/mol) to kilojoules per mole (kJ/mol), or the other way around. Both units describe energy per mole of substance. Because 1 kilocalorie equals exactly 4.184 kilojoules, the same conversion factor is used for any value reported per mole.
Energies written in kJ/mol will have a larger numerical value than the same quantity written in kcal/mol. For example, 10 kcal/mol is equal to 41.84 kJ/mol, while 50 kJ/mol is approximately 11.95 kcal/mol.
How to Convert kcal/mol to kJ/mol?
The following steps outline how to convert between kcal/mol and kJ/mol.
- First, determine the energy value you want to convert.
- Next, identify whether the starting unit is kcal/mol or kJ/mol.
- If converting from kcal/mol to kJ/mol, multiply the value by 4.184.
- If converting from kJ/mol to kcal/mol, divide the value by 4.184.
- Check your answer using the calculator above.
Example Problem:
Use the following values as an example problem to test your knowledge.
Energy = 10 kcal/mol
Converted Energy = 41.84 kJ/mol