| pace | 1 pace | 2 pace | 3 pace | 4 pace | 5 pace | 6 pace | 7 pace | 8 pace | 9 pace | 10 pace | 11 pace | 12 pace | 13 pace | 14 pace | 15 pace | 16 pace | 17 pace | 18 pace | 19 pace | 20 pace | 21 pace | 22 pace | 23 pace | 24 pace | 25 pace | 26 pace | 27 pace | 28 pace | 29 pace | 30 pace | 31 pace | 32 pace | 33 pace | 34 pace | 35 pace | 36 pace | 37 pace | 38 pace | 39 pace | 40 pace | 41 pace | 42 pace | 43 pace | 44 pace | 45 pace | 46 pace | 47 pace | 48 pace | 49 pace | 50 pace | 51 pace | 52 pace | 53 pace | 54 pace | 55 pace | 56 pace | 57 pace | 58 pace | 59 pace | 60 pace | 61 pace | 62 pace | 63 pace | 64 pace | 65 pace | 66 pace | 67 pace | 68 pace | 69 pace | 70 pace | 71 pace | 72 pace | 73 pace | 74 pace | 75 pace | 76 pace | 77 pace | 78 pace | 79 pace | 80 pace | 81 pace | 82 pace | 83 pace | 84 pace | 85 pace | 86 pace | 87 pace | 88 pace | 89 pace | 90 pace | 91 pace | 92 pace | 93 pace | 94 pace | 95 pace | 96 pace | 97 pace | 98 pace | 99 pace | 100 pace |
| fermi | 7.62 × 1014 fm | 1.524 × 1015 fm | 2.286 × 1015 fm | 3.048 × 1015 fm | 3.81 × 1015 fm | 4.572 × 1015 fm | 5.334 × 1015 fm | 6.096 × 1015 fm | 6.858 × 1015 fm | 7.62 × 1015 fm | 8.382 × 1015 fm | 9.144 × 1015 fm | 9.906 × 1015 fm | 1.0668 × 1016 fm | 1.143 × 1016 fm | 1.2192 × 1016 fm | 1.2954 × 1016 fm | 1.3716 × 1016 fm | 1.4478 × 1016 fm | 1.524 × 1016 fm | 1.6002 × 1016 fm | 1.6764 × 1016 fm | 1.7526 × 1016 fm | 1.8288 × 1016 fm | 1.905 × 1016 fm | 1.9812 × 1016 fm | 2.0574 × 1016 fm | 2.1336 × 1016 fm | 2.2098 × 1016 fm | 2.286 × 1016 fm | 2.3622 × 1016 fm | 2.4384 × 1016 fm | 2.5146 × 1016 fm | 2.5908 × 1016 fm | 2.667 × 1016 fm | 2.7432 × 1016 fm | 2.8194 × 1016 fm | 2.8956 × 1016 fm | 2.9718 × 1016 fm | 3.048 × 1016 fm | 3.1242 × 1016 fm | 3.2004 × 1016 fm | 3.2766 × 1016 fm | 3.3528 × 1016 fm | 3.429 × 1016 fm | 3.5052 × 1016 fm | 3.5814 × 1016 fm | 3.6576 × 1016 fm | 3.7338 × 1016 fm | 3.81 × 1016 fm | 3.8862 × 1016 fm | 3.9624 × 1016 fm | 4.0386 × 1016 fm | 4.1148 × 1016 fm | 4.191 × 1016 fm | 4.2672 × 1016 fm | 4.3434 × 1016 fm | 4.4196 × 1016 fm | 4.4958 × 1016 fm | 4.572 × 1016 fm | 4.6482 × 1016 fm | 4.7244 × 1016 fm | 4.8006 × 1016 fm | 4.8768 × 1016 fm | 4.953 × 1016 fm | 5.0292 × 1016 fm | 5.1054 × 1016 fm | 5.1816 × 1016 fm | 5.2578 × 1016 fm | 5.334 × 1016 fm | 5.4102 × 1016 fm | 5.4864 × 1016 fm | 5.5626 × 1016 fm | 5.6388 × 1016 fm | 5.715 × 1016 fm | 5.7912 × 1016 fm | 5.8674 × 1016 fm | 5.9436 × 1016 fm | 6.0198 × 1016 fm | 6.096 × 1016 fm | 6.1722 × 1016 fm | 6.2484 × 1016 fm | 6.3246 × 1016 fm | 6.4008 × 1016 fm | 6.477 × 1016 fm | 6.5532 × 1016 fm | 6.6294 × 1016 fm | 6.7056 × 1016 fm | 6.7818 × 1016 fm | 6.858 × 1016 fm | 6.9342 × 1016 fm | 7.0104 × 1016 fm | 7.0866 × 1016 fm | 7.1628 × 1016 fm | 7.239 × 1016 fm | 7.3152 × 1016 fm | 7.3914 × 1016 fm | 7.4676 × 1016 fm | 7.5438 × 1016 fm | 7.62 × 1016 fm |
A pace is a unit of length consisting either of one normal walking step (~0.75 m), or of a double step, returning to the same foot (~1.5 m). Like other traditional measurements, paces started as informal units but have since been standardized, often with the specific length set according to a typical brisk or military marching stride.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| pace | ≡ 2.5 ft | = 0.762 m | Imperial/US |
| paces | fermi | paces | fermi |
|---|---|---|---|
| 1 | = 7.62E+14 | 4 | = 3.048E+15 |
| 1.5 | = 1.143E+15 | 4.5 | = 3.429E+15 |
| 2 | = 1.524E+15 | 5 | = 3.81E+15 |
| 2.5 | = 1.905E+15 | 5.5 | = 4.191E+15 |
| 3 | = 2.286E+15 | 6 | = 4.572E+15 |
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.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| fermi | fm | ≡ 1×10−15 m | ≡ 1×10−15 m | Metric system Non-SI |
| fermi | paces | fermi | paces |
|---|---|---|---|
| 1 | = 1.3123359580052E-15 | 4 | = 5.249343832021E-15 |
| 1.5 | = 1.9685039370079E-15 | 4.5 | = 5.9055118110236E-15 |
| 2 | = 2.6246719160105E-15 | 5 | = 6.5616797900262E-15 |
| 2.5 | = 3.2808398950131E-15 | 5.5 | = 7.2178477690289E-15 |
| 3 | = 3.9370078740157E-15 | 6 | = 7.8740157480315E-15 |
| paces | fermi |
|---|---|
| 1 | = 7.62 × 1014 |
| 1.3123359580052 × 10-15 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |