| inch | 1 in | 2 in | 3 in | 4 in | 5 in | 6 in | 7 in | 8 in | 9 in | 10 in | 11 in | 12 in | 13 in | 14 in | 15 in | 16 in | 17 in | 18 in | 19 in | 20 in | 21 in | 22 in | 23 in | 24 in | 25 in | 26 in | 27 in | 28 in | 29 in | 30 in | 31 in | 32 in | 33 in | 34 in | 35 in | 36 in | 37 in | 38 in | 39 in | 40 in | 41 in | 42 in | 43 in | 44 in | 45 in | 46 in | 47 in | 48 in | 49 in | 50 in | 51 in | 52 in | 53 in | 54 in | 55 in | 56 in | 57 in | 58 in | 59 in | 60 in | 61 in | 62 in | 63 in | 64 in | 65 in | 66 in | 67 in | 68 in | 69 in | 70 in | 71 in | 72 in | 73 in | 74 in | 75 in | 76 in | 77 in | 78 in | 79 in | 80 in | 81 in | 82 in | 83 in | 84 in | 85 in | 86 in | 87 in | 88 in | 89 in | 90 in | 91 in | 92 in | 93 in | 94 in | 95 in | 96 in | 97 in | 98 in | 99 in | 100 in |
| yoctometer | 2.54 × 1022 ym | 5.08 × 1022 ym | 7.62 × 1022 ym | 1.016 × 1023 ym | 1.27 × 1023 ym | 1.524 × 1023 ym | 1.778 × 1023 ym | 2.032 × 1023 ym | 2.286 × 1023 ym | 2.54 × 1023 ym | 2.794 × 1023 ym | 3.048 × 1023 ym | 3.302 × 1023 ym | 3.556 × 1023 ym | 3.81 × 1023 ym | 4.064 × 1023 ym | 4.318 × 1023 ym | 4.572 × 1023 ym | 4.826 × 1023 ym | 5.08 × 1023 ym | 5.334 × 1023 ym | 5.588 × 1023 ym | 5.842 × 1023 ym | 6.096 × 1023 ym | 6.35 × 1023 ym | 6.604 × 1023 ym | 6.858 × 1023 ym | 7.112 × 1023 ym | 7.366 × 1023 ym | 7.62 × 1023 ym | 7.874 × 1023 ym | 8.128 × 1023 ym | 8.382 × 1023 ym | 8.636 × 1023 ym | 8.89 × 1023 ym | 9.144 × 1023 ym | 9.398 × 1023 ym | 9.652 × 1023 ym | 9.906 × 1023 ym | 1.016 × 1024 ym | 1.0414 × 1024 ym | 1.0668 × 1024 ym | 1.0922 × 1024 ym | 1.1176 × 1024 ym | 1.143 × 1024 ym | 1.1684 × 1024 ym | 1.1938 × 1024 ym | 1.2192 × 1024 ym | 1.2446 × 1024 ym | 1.27 × 1024 ym | 1.2954 × 1024 ym | 1.3208 × 1024 ym | 1.3462 × 1024 ym | 1.3716 × 1024 ym | 1.397 × 1024 ym | 1.4224 × 1024 ym | 1.4478 × 1024 ym | 1.4732 × 1024 ym | 1.4986 × 1024 ym | 1.524 × 1024 ym | 1.5494 × 1024 ym | 1.5748 × 1024 ym | 1.6002 × 1024 ym | 1.6256 × 1024 ym | 1.651 × 1024 ym | 1.6764 × 1024 ym | 1.7018 × 1024 ym | 1.7272 × 1024 ym | 1.7526 × 1024 ym | 1.778 × 1024 ym | 1.8034 × 1024 ym | 1.8288 × 1024 ym | 1.8542 × 1024 ym | 1.8796 × 1024 ym | 1.905 × 1024 ym | 1.9304 × 1024 ym | 1.9558 × 1024 ym | 1.9812 × 1024 ym | 2.0066 × 1024 ym | 2.032 × 1024 ym | 2.0574 × 1024 ym | 2.0828 × 1024 ym | 2.1082 × 1024 ym | 2.1336 × 1024 ym | 2.159 × 1024 ym | 2.1844 × 1024 ym | 2.2098 × 1024 ym | 2.2352 × 1024 ym | 2.2606 × 1024 ym | 2.286 × 1024 ym | 2.3114 × 1024 ym | 2.3368 × 1024 ym | 2.3622 × 1024 ym | 2.3876 × 1024 ym | 2.413 × 1024 ym | 2.4384 × 1024 ym | 2.4638 × 1024 ym | 2.4892 × 1024 ym | 2.5146 × 1024 ym | 2.54 × 1024 ym |
The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1⁄36 yard but usually understood as 1⁄12 of a foot. Derived from the Roman uncia ("twelfth"), inch is also sometimes used to translate related units in other measurement systems, usually understood as deriving from the width of the human thumb.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| inch | in | ≡ 2.54 cm ≡ 1⁄36 yd ≡ 1⁄12 ft | ≡ 0.0254 m | Imperial/US |
| inches | yoctometers | inches | yoctometers |
|---|---|---|---|
| 1 | ≡ 2.54E+22 | 4 | ≡ 1.016E+23 |
| 1.5 | ≡ 3.81E+22 | 4.5 | ≡ 1.143E+23 |
| 2 | ≡ 5.08E+22 | 5 | ≡ 1.27E+23 |
| 2.5 | ≡ 6.35E+22 | 5.5 | ≡ 1.397E+23 |
| 3 | ≡ 7.62E+22 | 6 | ≡ 1.524E+23 |
The yoctometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: ym) or yoctometer (American spelling) is an SI measure of length that is equal to 10−24 (yocto) of a metre. It is the smallest named subdivision of the metre in the SI base unit of length.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| yoctometer | ym | ≡ 1×10-24 m | ≡ 1×10-24 m | Metric system SI |
| yoctometers | inches | yoctometers | inches |
|---|---|---|---|
| 1 | ≡ 3.9370078740157E-23 | 4 | ≡ 1.5748031496063E-22 |
| 1.5 | ≡ 5.9055118110236E-23 | 4.5 | ≡ 1.7716535433071E-22 |
| 2 | ≡ 7.8740157480315E-23 | 5 | ≡ 1.9685039370079E-22 |
| 2.5 | ≡ 9.8425196850394E-23 | 5.5 | ≡ 2.1653543307087E-22 |
| 3 | ≡ 1.1811023622047E-22 | 6 | ≡ 2.3622047244094E-22 |
| inches | yoctometers |
|---|---|
| 1 | ≡ 2.54 × 1022 |
| 3.9370078740157 × 10-23 | ≡ 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 …) |