| 1 Femtojoules | to common energy units |
|---|---|
| 1 fJ | = 1.0E-15 joules (J) |
| 1 fJ | = 1.0E-18 kilojoules (kJ) |
| 1 fJ | = 2.3900573613767E-16 calories (cal) |
| 1 fJ | = 2.3900573613767E-19 kilocalories (kcal) |
| 1 fJ | = 6241.4959617521 electron volt (eV) |
| 1 fJ | = 2.7777777777778E-19 watt hour (Wh) |
| 1 fJ | = 229.37126583579 atomic unit of energy (au) |
| 1 fJ | = 2.3900573613767E-25 tons of TNT (tTNT) |
| 1 fJ | = 7.3756214927727E-16 foot pound force (ft lbf) |
| 1 fJ | = 1.0E-8 ergs (ergs) |
| Femtojoules | to Rydberg (table conversion) |
|---|---|
| 1 fJ | = 458.74253167158 Ry |
| 2 fJ | = 917.48506334317 Ry |
| 3 fJ | = 1376.2275950148 Ry |
| 4 fJ | = 1834.9701266863 Ry |
| 5 fJ | = 2293.7126583579 Ry |
| 6 fJ | = 2752.4551900295 Ry |
| 7 fJ | = 3211.1977217011 Ry |
| 8 fJ | = 3669.9402533727 Ry |
| 9 fJ | = 4128.6827850443 Ry |
| 10 fJ | = 4587.4253167158 Ry |
| 20 fJ | = 9174.8506334317 Ry |
| 30 fJ | = 13762.275950148 Ry |
| 40 fJ | = 18349.701266863 Ry |
| 50 fJ | = 22937.126583579 Ry |
| 60 fJ | = 27524.551900295 Ry |
| 70 fJ | = 32111.977217011 Ry |
| 80 fJ | = 36699.402533727 Ry |
| 90 fJ | = 41286.827850443 Ry |
| 100 fJ | = 45874.253167158 Ry |
| 200 fJ | = 91748.506334317 Ry |
| 300 fJ | = 137622.75950148 Ry |
| 400 fJ | = 183497.01266863 Ry |
| 500 fJ | = 229371.26583579 Ry |
| 600 fJ | = 275245.51900295 Ry |
| 700 fJ | = 321119.77217011 Ry |
| 800 fJ | = 366994.02533727 Ry |
| 900 fJ | = 412868.27850443 Ry |
| 1000 fJ | = 458742.53167158 Ry |
| 2000 fJ | = 917485.06334317 Ry |
| 4000 fJ | = 1834970.1266863 Ry |
| 5000 fJ | = 2293712.6583579 Ry |
| 7500 fJ | = 3440568.9875369 Ry |
| 10000 fJ | = 4587425.3167158 Ry |
| 25000 fJ | = 11468563.29179 Ry |
| 50000 fJ | = 22937126.583579 Ry |
| 100000 fJ | = 45874253.167158 Ry |
| 1000000 fJ | = 458742531.67158 Ry |
| 1000000000 fJ | = 458742531671.58 Ry |