For a more detailed version with better accuracy, see:
http://wild.life.nctu.edu.tw/class/common/energy-unit-conv-table-detail.html
The table below was taken from http://mccammon.ucsd.edu/~dzhang/energy-unit-conv-table.html.
Most of these numbers have been taken from an old book by Karplus and Porter.
To convert from a unit Y in the left hand column to a unit X in the top row,
mutiply by the table element, MX,Y. Example:
1 hartree = 27.2107 eV
When accuracy is very important, I recommend going instead to the NIST website:
Fundamental Physical Constants from NIST
| Energy Conversion Table |
|
hartree |
eV |
cm-1 |
kcal/mol |
kJ/mol |
oK |
J |
Hz |
| hartree |
1 |
27.2107 |
219 474.63 |
627.503 |
2 625.5 |
315 777. |
43.60 x 10-19 |
6.57966 x 10+15 |
| eV |
0.0367502 |
1 |
8 065.73 |
23.060 9 |
96.486 9 |
11 604.9 |
1.602 10 x 10-19 |
2.418 04 x 10+14 |
| cm-1 |
4.556 33 x 10-6 |
1.239 81 x 10-4 |
1 |
0.002 859 11 |
0.011 962 7 |
1.428 79 |
1.986 30 x 10-23 |
2.997 93 x 10+10 |
| kcal/mol |
0.001 593 62 |
0.043 363 4 |
349.757 |
1 |
4.18400 |
503.228 |
6.95 x 10-21 |
1.048 54 x 10+13 |
| kJ/mol |
0.000 380 88 |
0.010 364 10 |
83.593 |
0.239001 |
1 |
120.274 |
1.66 x 10-21 |
2.506 07 x 10+12 |
| oK |
0.000 003 166 78 |
0.000 086 170 5 |
0.695 028 |
0.001 987 17 |
0.008 314 35 |
1 |
1.380 54 x 10-23 |
2.083 64 x 10+10 |
| J |
2.294 x 10+17 |
6.241 81 x 10+18 |
5.034 45 x 10+22 |
1.44 x 10+20 |
6.02 x 10+20 |
7.243 54 x 10+22 |
1 |
1.509 30 x 10+33 |
| Hz |
1.519 83 x 10-16 |
4.135 58 x 10-15 |
3.335 65 x 10-11 |
9.537 02 x 10-14 |
|
4.799 30 x 10-11 |
6.625 61 x 10-34 |
1 |