| millimeter | 1 mm | 2 mm | 3 mm | 4 mm | 5 mm | 6 mm | 7 mm | 8 mm | 9 mm | 10 mm | 11 mm | 12 mm | 13 mm | 14 mm | 15 mm | 16 mm | 17 mm | 18 mm | 19 mm | 20 mm | 21 mm | 22 mm | 23 mm | 24 mm | 25 mm | 26 mm | 27 mm | 28 mm | 29 mm | 30 mm | 31 mm | 32 mm | 33 mm | 34 mm | 35 mm | 36 mm | 37 mm | 38 mm | 39 mm | 40 mm | 41 mm | 42 mm | 43 mm | 44 mm | 45 mm | 46 mm | 47 mm | 48 mm | 49 mm | 50 mm | 51 mm | 52 mm | 53 mm | 54 mm | 55 mm | 56 mm | 57 mm | 58 mm | 59 mm | 60 mm | 61 mm | 62 mm | 63 mm | 64 mm | 65 mm | 66 mm | 67 mm | 68 mm | 69 mm | 70 mm | 71 mm | 72 mm | 73 mm | 74 mm | 75 mm | 76 mm | 77 mm | 78 mm | 79 mm | 80 mm | 81 mm | 82 mm | 83 mm | 84 mm | 85 mm | 86 mm | 87 mm | 88 mm | 89 mm | 90 mm | 91 mm | 92 mm | 93 mm | 94 mm | 95 mm | 96 mm | 97 mm | 98 mm | 99 mm | 100 mm |
| fermtometer | 1 000 000 000 000 fm | 2 000 000 000 000 fm | 3 000 000 000 000 fm | 4 000 000 000 000 fm | 5 000 000 000 000 fm | 6 000 000 000 000 fm | 7 000 000 000 000 fm | 8 000 000 000 000 fm | 9 000 000 000 000 fm | 10 000 000 000 000 fm | 11 000 000 000 000 fm | 12 000 000 000 000 fm | 13 000 000 000 000 fm | 14 000 000 000 000 fm | 15 000 000 000 000 fm | 16 000 000 000 000 fm | 17 000 000 000 000 fm | 18 000 000 000 000 fm | 19 000 000 000 000 fm | 20 000 000 000 000 fm | 21 000 000 000 000 fm | 22 000 000 000 000 fm | 23 000 000 000 000 fm | 24 000 000 000 000 fm | 25 000 000 000 000 fm | 26 000 000 000 000 fm | 27 000 000 000 000 fm | 28 000 000 000 000 fm | 29 000 000 000 000 fm | 30 000 000 000 000 fm | 31 000 000 000 000 fm | 32 000 000 000 000 fm | 33 000 000 000 000 fm | 34 000 000 000 000 fm | 35 000 000 000 000 fm | 36 000 000 000 000 fm | 37 000 000 000 000 fm | 38 000 000 000 000 fm | 39 000 000 000 000 fm | 40 000 000 000 000 fm | 41 000 000 000 000 fm | 42 000 000 000 000 fm | 43 000 000 000 000 fm | 44 000 000 000 000 fm | 45 000 000 000 000 fm | 46 000 000 000 000 fm | 47 000 000 000 000 fm | 48 000 000 000 000 fm | 49 000 000 000 000 fm | 50 000 000 000 000 fm | 51 000 000 000 000 fm | 52 000 000 000 000 fm | 53 000 000 000 000 fm | 54 000 000 000 000 fm | 55 000 000 000 000 fm | 56 000 000 000 000 fm | 57 000 000 000 000 fm | 58 000 000 000 000 fm | 59 000 000 000 000 fm | 60 000 000 000 000 fm | 61 000 000 000 000 fm | 62 000 000 000 000 fm | 63 000 000 000 000 fm | 64 000 000 000 000 fm | 65 000 000 000 000 fm | 66 000 000 000 000 fm | 67 000 000 000 000 fm | 68 000 000 000 000 fm | 69 000 000 000 000 fm | 70 000 000 000 000 fm | 71 000 000 000 000 fm | 72 000 000 000 000 fm | 73 000 000 000 000 fm | 74 000 000 000 000 fm | 75 000 000 000 000 fm | 76 000 000 000 000 fm | 77 000 000 000 000 fm | 78 000 000 000 000 fm | 79 000 000 000 000 fm | 80 000 000 000 000 fm | 81 000 000 000 000 fm | 82 000 000 000 000 fm | 83 000 000 000 000 fm | 84 000 000 000 000 fm | 85 000 000 000 000 fm | 86 000 000 000 000 fm | 87 000 000 000 000 fm | 88 000 000 000 000 fm | 89 000 000 000 000 fm | 90 000 000 000 000 fm | 91 000 000 000 000 fm | 92 000 000 000 000 fm | 93 000 000 000 000 fm | 94 000 000 000 000 fm | 95 000 000 000 000 fm | 96 000 000 000 000 fm | 97 000 000 000 000 fm | 98 000 000 000 000 fm | 99 000 000 000 000 fm | 1.0 × 1014 fm |
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 |
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 |
| 1 millimeters ≡ 1 000 000 000 000 fermtometers |
| 1 fermtometers ≡ 1.0 × 10-12 millimeters |