| 0fm | 0km |
| 1fm | 1 × 10⁻¹⁸km |
| 2fm | 2 × 10⁻¹⁸km |
| 3fm | 3 × 10⁻¹⁸km |
| 4fm | 4 × 10⁻¹⁸km |
| 5fm | 5 × 10⁻¹⁸km |
| 6fm | 6 × 10⁻¹⁸km |
| 7fm | 7 × 10⁻¹⁸km |
| 8fm | 8 × 10⁻¹⁸km |
| 9fm | 9 × 10⁻¹⁸km |
| 10fm | 1 × 10⁻¹⁷km |
| 11fm | 1.1 × 10⁻¹⁷km |
| 12fm | 1.2 × 10⁻¹⁷km |
| 13fm | 1.3 × 10⁻¹⁷km |
| 14fm | 1.4 × 10⁻¹⁷km |
| 15fm | 1.5 × 10⁻¹⁷km |
| 16fm | 1.6 × 10⁻¹⁷km |
| 17fm | 1.7 × 10⁻¹⁷km |
| 18fm | 1.8 × 10⁻¹⁷km |
| 19fm | 1.9 × 10⁻¹⁷km |
| 20fm | 2 × 10⁻¹⁷km |
| 21fm | 2.1 × 10⁻¹⁷km |
| 22fm | 2.2 × 10⁻¹⁷km |
| 23fm | 2.3 × 10⁻¹⁷km |
| 24fm | 2.4 × 10⁻¹⁷km |
| 25fm | 2.5 × 10⁻¹⁷km |
| 26fm | 2.6 × 10⁻¹⁷km |
| 27fm | 2.7 × 10⁻¹⁷km |
| 28fm | 2.8 × 10⁻¹⁷km |
| 29fm | 2.9 × 10⁻¹⁷km |
| 30fm | 3 × 10⁻¹⁷km |
| 31fm | 3.1 × 10⁻¹⁷km |
| 32fm | 3.2 × 10⁻¹⁷km |
| 33fm | 3.3 × 10⁻¹⁷km |
| 34fm | 3.4 × 10⁻¹⁷km |
| 35fm | 3.5 × 10⁻¹⁷km |
| 36fm | 3.6 × 10⁻¹⁷km |
| 37fm | 3.7 × 10⁻¹⁷km |
| 38fm | 3.8 × 10⁻¹⁷km |
| 39fm | 3.9 × 10⁻¹⁷km |
| 40fm | 4 × 10⁻¹⁷km |
| 41fm | 4.1 × 10⁻¹⁷km |
| 42fm | 4.2 × 10⁻¹⁷km |
| 43fm | 4.3 × 10⁻¹⁷km |
| 44fm | 4.4 × 10⁻¹⁷km |
| 45fm | 4.5 × 10⁻¹⁷km |
| 46fm | 4.6 × 10⁻¹⁷km |
| 47fm | 4.7 × 10⁻¹⁷km |
| 48fm | 4.8 × 10⁻¹⁷km |
| 49fm | 4.9 × 10⁻¹⁷km |
| 50fm | 5 × 10⁻¹⁷km |
| 51fm | 5.1 × 10⁻¹⁷km |
| 52fm | 5.2 × 10⁻¹⁷km |
| 53fm | 5.3 × 10⁻¹⁷km |
| 54fm | 5.4 × 10⁻¹⁷km |
| 55fm | 5.5 × 10⁻¹⁷km |
| 56fm | 5.6 × 10⁻¹⁷km |
| 57fm | 5.7 × 10⁻¹⁷km |
| 58fm | 5.8 × 10⁻¹⁷km |
| 59fm | 5.9 × 10⁻¹⁷km |
| 60fm | 6 × 10⁻¹⁷km |
| 61fm | 6.1 × 10⁻¹⁷km |
| 62fm | 6.2 × 10⁻¹⁷km |
| 63fm | 6.3 × 10⁻¹⁷km |
| 64fm | 6.4 × 10⁻¹⁷km |
| 65fm | 6.5 × 10⁻¹⁷km |
| 66fm | 6.6 × 10⁻¹⁷km |
| 67fm | 6.7 × 10⁻¹⁷km |
| 68fm | 6.8 × 10⁻¹⁷km |
| 69fm | 6.9 × 10⁻¹⁷km |
| 70fm | 7 × 10⁻¹⁷km |
| 71fm | 7.1 × 10⁻¹⁷km |
| 72fm | 7.2 × 10⁻¹⁷km |
| 73fm | 7.3 × 10⁻¹⁷km |
| 74fm | 7.4 × 10⁻¹⁷km |
| 75fm | 7.5 × 10⁻¹⁷km |
| 76fm | 7.6 × 10⁻¹⁷km |
| 77fm | 7.7 × 10⁻¹⁷km |
| 78fm | 7.8 × 10⁻¹⁷km |
| 79fm | 7.9 × 10⁻¹⁷km |
| 80fm | 8 × 10⁻¹⁷km |
| 81fm | 8.1 × 10⁻¹⁷km |
| 82fm | 8.2 × 10⁻¹⁷km |
| 83fm | 8.3 × 10⁻¹⁷km |
| 84fm | 8.4 × 10⁻¹⁷km |
| 85fm | 8.5 × 10⁻¹⁷km |
| 86fm | 8.6 × 10⁻¹⁷km |
| 87fm | 8.7 × 10⁻¹⁷km |
| 88fm | 8.8 × 10⁻¹⁷km |
| 89fm | 8.9 × 10⁻¹⁷km |
| 90fm | 9 × 10⁻¹⁷km |
| 91fm | 9.1 × 10⁻¹⁷km |
| 92fm | 9.2 × 10⁻¹⁷km |
| 93fm | 9.3 × 10⁻¹⁷km |
| 94fm | 9.4 × 10⁻¹⁷km |
| 95fm | 9.5 × 10⁻¹⁷km |
| 96fm | 9.6 × 10⁻¹⁷km |
| 97fm | 9.7 × 10⁻¹⁷km |
| 98fm | 9.8 × 10⁻¹⁷km |
| 99fm | 9.9 × 10⁻¹⁷km |
The fermis is a unit of length in the non-SI metric system and uses the symbol fm.
One fermi is equal to 1×10−15m or 3.9370×10−14 in.
It is used to measure nuclear distances and was named after the Italian physicist Enrico Fermi (1901–1954). It has now been replaced with the SI-derived term femtometre.
The kilometre is a unit of length and is a multiple of the metre; an SI derived unit. It has the symbol km.
A kilometre is equal to 1000m, 1094 yards and 0.621 miles.
Kilometres is used to measure road distances in the US, though the UK is still using the imperial "sister" miles.