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 |
foot, metric | 0.0803219 mf | 0.1606437 mf | 0.2409656 mf | 0.3212874 mf | 0.4016093 mf | 0.4819311 mf | 0.5622530 mf | 0.6425748 mf | 0.7228967 mf | 0.8032185 mf | 0.8835404 mf | 0.9638622 mf | 1.0441841 mf | 1.1245059 mf | 1.2048278 mf | 1.2851496 mf | 1.3654715 mf | 1.4457933 mf | 1.5261152 mf | 1.6064371 mf | 1.6867589 mf | 1.7670808 mf | 1.8474026 mf | 1.9277245 mf | 2.0080463 mf | 2.0883682 mf | 2.1686900 mf | 2.2490119 mf | 2.3293337 mf | 2.4096556 mf | 2.4899774 mf | 2.5702993 mf | 2.6506211 mf | 2.7309430 mf | 2.8112648 mf | 2.8915867 mf | 2.9719085 mf | 3.0522304 mf | 3.1325523 mf | 3.2128741 mf | 3.2931960 mf | 3.3735178 mf | 3.4538397 mf | 3.5341615 mf | 3.6144834 mf | 3.6948052 mf | 3.7751271 mf | 3.8554489 mf | 3.9357708 mf | 4.0160926 mf | 4.0964145 mf | 4.1767363 mf | 4.2570582 mf | 4.3373800 mf | 4.4177019 mf | 4.4980237 mf | 4.5783456 mf | 4.6586674 mf | 4.7389893 mf | 4.8193112 mf | 4.8996330 mf | 4.9799549 mf | 5.0602767 mf | 5.1405986 mf | 5.2209204 mf | 5.3012423 mf | 5.3815641 mf | 5.4618860 mf | 5.5422078 mf | 5.6225297 mf | 5.7028515 mf | 5.7831734 mf | 5.8634952 mf | 5.9438171 mf | 6.0241389 mf | 6.1044608 mf | 6.1847826 mf | 6.2651045 mf | 6.3454264 mf | 6.4257482 mf | 6.5060701 mf | 6.5863919 mf | 6.6667138 mf | 6.7470356 mf | 6.8273575 mf | 6.9076793 mf | 6.9880012 mf | 7.0683230 mf | 7.1486449 mf | 7.2289667 mf | 7.3092886 mf | 7.3896104 mf | 7.4699323 mf | 7.5502541 mf | 7.6305760 mf | 7.7108978 mf | 7.7912197 mf | 7.8715416 mf | 7.9518634 mf | 8.0321853 mf |
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 | feet, metric | inches | feet, metric |
---|---|---|---|
1 | ≈ 0.080321852567474 | 4 | ≈ 0.32128741026989 |
1.5 | ≈ 0.12048277885121 | 4.5 | ≈ 0.36144833655363 |
2 | ≈ 0.16064370513495 | 5 | ≈ 0.40160926283737 |
2.5 | ≈ 0.20080463141868 | 5.5 | ≈ 0.44177018912111 |
3 | ≈ 0.24096555770242 | 6 | ≈ 0.48193111540484 |
A metric foot is a nickname for a preferred number length of 3 basic modules (3 M), or 30 centimetres (11.811 in). The 30 cm metric ruler was a similar length to the traditional imperial one-foot ruler. A metric foot is 4.8 millimetres (0.189 in) shorter than an imperial foot.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
foot, metric | mf | ≡ √ 1⁄10 m | ≈ 0.31622776602 m | Metric system Non-SI |
feet, metric | inches | feet, metric | inches |
---|---|---|---|
1 | ≈ 12.449912048031 | 4 | ≈ 49.799648192126 |
1.5 | ≈ 18.674868072047 | 4.5 | ≈ 56.024604216142 |
2 | ≈ 24.899824096063 | 5 | ≈ 62.249560240157 |
2.5 | ≈ 31.124780120079 | 5.5 | ≈ 68.474516264173 |
3 | ≈ 37.349736144094 | 6 | ≈ 74.699472288189 |
inches | feet, metric |
---|---|
1 | ≈ 0.0803219 |
12.4499120 | ≈ 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 …) |