Enter an energy-per-mole value in kilojoules per mole (kJ/mol) and an amount in moles to calculate the total energy in joules (J). You can also convert between kJ/mol and J/mol (or calories) using the unit drop-downs.
kJ/mol to J Conversion Formula
The following formula is used to convert an energy-per-mole value in kilojoules per mole (kJ/mol) to a total energy in joules (J) for a given amount of substance:
E(J) = (E_m(kJ/mol) * 1000) * n(mol)
Variables:
- E is the total energy (J)
- Em is the energy per mole (kJ/mol)
- n is the amount of substance (mol)
To convert kJ/mol to J/mol, multiply by 1000. To find the total energy in J, multiply that J/mol value by the number of moles.
| Energy per Mole (kJ/mol) | Joules (1 mol) | Joules (1 mmol) | Joules (1 µmol) | |
|---|---|---|---|---|
| 1 | 1000.000 | 1.000 | 0.001 | |
| 2 | 2000.000 | 2.000 | 0.002 | |
| 5 | 5000.000 | 5.000 | 0.005 | |
| 10 | 10000.000 | 10.000 | 0.010 | |
| 15 | 15000.000 | 15.000 | 0.015 | |
| 20 | 20000.000 | 20.000 | 0.020 | |
| 25 | 25000.000 | 25.000 | 0.025 | |
| 30 | 30000.000 | 30.000 | 0.030 | |
| 40 | 40000.000 | 40.000 | 0.040 | |
| 50 | 50000.000 | 50.000 | 0.050 | |
| 60 | 60000.000 | 60.000 | 0.060 | |
| 75 | 75000.000 | 75.000 | 0.075 | |
| 100 | 100000.000 | 100.000 | 0.100 | |
| 150 | 150000.000 | 150.000 | 0.150 | |
| 200 | 200000.000 | 200.000 | 0.200 | |
| 250 | 250000.000 | 250.000 | 0.250 | |
| 300 | 300000.000 | 300.000 | 0.300 | |
| 350 | 350000.000 | 350.000 | 0.350 | |
| 400 | 400000.000 | 400.000 | 0.400 | 0.400 |
| 500 | 500000.000 | 500.000 | 0.500 | |
| * Rounded to 3 decimals. Relation: Energy (J) = (kJ/mol × 1000) × moles. For 1 mol: 1 kJ/mol = 1000 J; 1 mmol: 1 kJ/mol = 1 J; 1 µmol: 1 kJ/mol = 0.001 J. | ||||
What is Energy Conversion?
Energy conversion is the process of changing one unit of energy to another. In chemistry and physics, energy per mole is often reported in kJ/mol, while some calculations use J/mol. If you need a total energy in J (rather than per mole), you must also multiply by the amount of substance in moles.
How to Convert kJ/mol to J?
The following steps outline how to convert an energy-per-mole value from kJ/mol into a total energy in J.
- Determine the energy per mole in kJ/mol.
- Determine the amount of substance in mol.
- Use the conversion formula: E(J) = (kJ/mol × 1000) × mol.
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Energy per mole = 5 kJ/mol
Amount = 1 mol
Total energy: E = 5 × 1000 × 1 = 5000 J
