| Femtometer | Fathom |
| 1 fm | 5.4680664916885E-16 fathom |
| 2 fm | 1.0936132983377E-15 fathom |
| 3 fm | 1.6404199475065E-15 fathom |
| 4 fm | 2.1872265966754E-15 fathom |
| 5 fm | 2.7340332458442E-15 fathom |
| 6 fm | 3.2808398950131E-15 fathom |
| 7 fm | 3.8276465441819E-15 fathom |
| 8 fm | 4.3744531933508E-15 fathom |
| 9 fm | 4.9212598425196E-15 fathom |
| 10 fm | 5.4680664916885E-15 fathom |
| 11 fm | 6.0148731408573E-15 fathom |
| 12 fm | 6.5616797900262E-15 fathom |
| 13 fm | 7.108486439195E-15 fathom |
| 14 fm | 7.6552930883639E-15 fathom |
| 15 fm | 8.2020997375327E-15 fathom |
| 16 fm | 8.7489063867016E-15 fathom |
| 17 fm | 9.2957130358704E-15 fathom |
| 18 fm | 9.8425196850393E-15 fathom |
| 19 fm | 1.0389326334208E-14 fathom |
| 20 fm | 1.0936132983377E-14 fathom |