| fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
| millimeter | 1.0 × 10-12 mm | 2.0 × 10-12 mm | 3.0 × 10-12 mm | 4.0 × 10-12 mm | 5.0 × 10-12 mm | 6.0 × 10-12 mm | 7.0 × 10-12 mm | 8.0 × 10-12 mm | 9.0 × 10-12 mm | 1.0 × 10-11 mm | 1.1 × 10-11 mm | 1.2 × 10-11 mm | 1.3 × 10-11 mm | 1.4 × 10-11 mm | 1.5 × 10-11 mm | 1.6 × 10-11 mm | 1.7 × 10-11 mm | 1.8 × 10-11 mm | 1.9 × 10-11 mm | 2.0 × 10-11 mm | 2.1 × 10-11 mm | 2.2 × 10-11 mm | 2.3 × 10-11 mm | 2.4 × 10-11 mm | 2.5 × 10-11 mm | 2.6 × 10-11 mm | 2.7 × 10-11 mm | 2.8 × 10-11 mm | 2.9 × 10-11 mm | 3.0 × 10-11 mm | 3.1 × 10-11 mm | 3.2 × 10-11 mm | 3.3 × 10-11 mm | 3.4 × 10-11 mm | 3.5 × 10-11 mm | 3.6 × 10-11 mm | 3.7 × 10-11 mm | 3.8 × 10-11 mm | 3.9 × 10-11 mm | 4.0 × 10-11 mm | 4.1 × 10-11 mm | 4.2 × 10-11 mm | 4.3 × 10-11 mm | 4.4 × 10-11 mm | 4.5 × 10-11 mm | 4.6 × 10-11 mm | 4.7 × 10-11 mm | 4.8 × 10-11 mm | 4.9 × 10-11 mm | 5.0 × 10-11 mm | 5.1 × 10-11 mm | 5.2 × 10-11 mm | 5.3 × 10-11 mm | 5.4 × 10-11 mm | 5.5 × 10-11 mm | 5.6 × 10-11 mm | 5.7 × 10-11 mm | 5.8 × 10-11 mm | 5.9 × 10-11 mm | 6.0 × 10-11 mm | 6.1 × 10-11 mm | 6.2 × 10-11 mm | 6.3 × 10-11 mm | 6.4 × 10-11 mm | 6.5 × 10-11 mm | 6.6 × 10-11 mm | 6.7 × 10-11 mm | 6.8 × 10-11 mm | 6.9 × 10-11 mm | 7.0 × 10-11 mm | 7.1 × 10-11 mm | 7.2 × 10-11 mm | 7.3 × 10-11 mm | 7.4 × 10-11 mm | 7.5 × 10-11 mm | 7.6 × 10-11 mm | 7.7 × 10-11 mm | 7.8 × 10-11 mm | 7.9 × 10-11 mm | 8.0 × 10-11 mm | 8.1 × 10-11 mm | 8.2 × 10-11 mm | 8.3 × 10-11 mm | 8.4 × 10-11 mm | 8.5 × 10-11 mm | 8.6 × 10-11 mm | 8.7 × 10-11 mm | 8.8 × 10-11 mm | 8.9 × 10-11 mm | 9.0 × 10-11 mm | 9.1 × 10-11 mm | 9.2 × 10-11 mm | 9.3 × 10-11 mm | 9.4 × 10-11 mm | 9.5 × 10-11 mm | 9.6 × 10-11 mm | 9.7 × 10-11 mm | 9.8 × 10-11 mm | 9.9 × 10-11 mm | 1.0 × 10-10 mm |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
| 1 fermtometers ≡ 1.0E-12 millimeters | 4 fermtometers ≡ 4.0E-12 millimeters |
| 1.5 fermtometers ≡ 1.5E-12 millimeters | 4.5 fermtometers ≡ 4.5E-12 millimeters |
| 2 fermtometers ≡ 2.0E-12 millimeters | 5 fermtometers ≡ 5.0E-12 millimeters |
| 2.5 fermtometers ≡ 2.5E-12 millimeters | 5.5 fermtometers ≡ 5.5E-12 millimeters |
| 3 fermtometers ≡ 3.0E-12 millimeters | 6 fermtometers ≡ 6.0E-12 millimeters |
The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore there are thousand millimetres in a metre. There are ten millimetres in a centimetre.
| 1 millimeters ≡ 1000000000000 fermtometers | 4 millimeters ≡ 4000000000000 fermtometers |
| 1.5 millimeters ≡ 1500000000000 fermtometers | 4.5 millimeters ≡ 4500000000000 fermtometers |
| 2 millimeters ≡ 2000000000000 fermtometers | 5 millimeters ≡ 5000000000000 fermtometers |
| 2.5 millimeters ≡ 2500000000000 fermtometers | 5.5 millimeters ≡ 5500000000000 fermtometers |
| 3 millimeters ≡ 3000000000000 fermtometers | 6 millimeters ≡ 6000000000000 fermtometers |
| 1 fermtometers ≡ 1.0 × 10-12 millimeters |
| 1 millimeters ≡ 1 000 000 000 000 fermtometers |