mil | 1 mil | 2 mil | 3 mil | 4 mil | 5 mil | 6 mil | 7 mil | 8 mil | 9 mil | 10 mil | 11 mil | 12 mil | 13 mil | 14 mil | 15 mil | 16 mil | 17 mil | 18 mil | 19 mil | 20 mil | 21 mil | 22 mil | 23 mil | 24 mil | 25 mil | 26 mil | 27 mil | 28 mil | 29 mil | 30 mil | 31 mil | 32 mil | 33 mil | 34 mil | 35 mil | 36 mil | 37 mil | 38 mil | 39 mil | 40 mil | 41 mil | 42 mil | 43 mil | 44 mil | 45 mil | 46 mil | 47 mil | 48 mil | 49 mil | 50 mil | 51 mil | 52 mil | 53 mil | 54 mil | 55 mil | 56 mil | 57 mil | 58 mil | 59 mil | 60 mil | 61 mil | 62 mil | 63 mil | 64 mil | 65 mil | 66 mil | 67 mil | 68 mil | 69 mil | 70 mil | 71 mil | 72 mil | 73 mil | 74 mil | 75 mil | 76 mil | 77 mil | 78 mil | 79 mil | 80 mil | 81 mil | 82 mil | 83 mil | 84 mil | 85 mil | 86 mil | 87 mil | 88 mil | 89 mil | 90 mil | 91 mil | 92 mil | 93 mil | 94 mil | 95 mil | 96 mil | 97 mil | 98 mil | 99 mil | 100 mil |
inch | 0.001 in | 0.002 in | 0.003 in | 0.004 in | 0.005 in | 0.006 in | 0.007 in | 0.008 in | 0.009 in | 0.01 in | 0.011 in | 0.012 in | 0.013 in | 0.014 in | 0.015 in | 0.016 in | 0.017 in | 0.018 in | 0.019 in | 0.02 in | 0.021 in | 0.022 in | 0.023 in | 0.024 in | 0.025 in | 0.026 in | 0.027 in | 0.028 in | 0.029 in | 0.03 in | 0.031 in | 0.032 in | 0.033 in | 0.034 in | 0.035 in | 0.036 in | 0.037 in | 0.038 in | 0.039 in | 0.04 in | 0.041 in | 0.042 in | 0.043 in | 0.044 in | 0.045 in | 0.046 in | 0.047 in | 0.048 in | 0.049 in | 0.05 in | 0.051 in | 0.052 in | 0.053 in | 0.054 in | 0.055 in | 0.056 in | 0.057 in | 0.058 in | 0.059 in | 0.06 in | 0.061 in | 0.062 in | 0.063 in | 0.064 in | 0.065 in | 0.066 in | 0.067 in | 0.068 in | 0.069 in | 0.07 in | 0.071 in | 0.072 in | 0.073 in | 0.074 in | 0.075 in | 0.076 in | 0.077 in | 0.078 in | 0.079 in | 0.08 in | 0.081 in | 0.082 in | 0.083 in | 0.084 in | 0.085 in | 0.086 in | 0.087 in | 0.088 in | 0.089 in | 0.09 in | 0.091 in | 0.092 in | 0.093 in | 0.094 in | 0.095 in | 0.096 in | 0.097 in | 0.098 in | 0.099 in | 0.1 in |
A thousandth of an inch is a derived unit of length in an inch-based system of units. Equal to 0.001 inches, it is normally referred to as a thou /ˈθaʊ/, a thousandth, or (particularly in the United States) a mil.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
mil | mil | ≡ 1×10−3 in | ≡ 2.54×10−5 m | Imperial/US |
mils | inches | mils | inches |
---|---|---|---|
1 | ≡ 0.001 | 4 | ≡ 0.004 |
1.5 | ≡ 0.0015 | 4.5 | ≡ 0.0045 |
2 | ≡ 0.002 | 5 | ≡ 0.005 |
2.5 | ≡ 0.0025 | 5.5 | ≡ 0.0055 |
3 | ≡ 0.003 | 6 | ≡ 0.006 |
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 | mils | inches | mils |
---|---|---|---|
1 | ≡ 1000 | 4 | ≡ 4000 |
1.5 | ≡ 1500 | 4.5 | ≡ 4500 |
2 | ≡ 2000 | 5 | ≡ 5000 |
2.5 | ≡ 2500 | 5.5 | ≡ 5500 |
3 | ≡ 3000 | 6 | ≡ 6000 |
mils | inches |
---|---|
1 | ≡ 0.001 |
1 000 | ≡ 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 …) |