| metric inch | 1 in (metric) | 2 in (metric) | 3 in (metric) | 4 in (metric) | 5 in (metric) | 6 in (metric) | 7 in (metric) | 8 in (metric) | 9 in (metric) | 10 in (metric) | 11 in (metric) | 12 in (metric) | 13 in (metric) | 14 in (metric) | 15 in (metric) | 16 in (metric) | 17 in (metric) | 18 in (metric) | 19 in (metric) | 20 in (metric) | 21 in (metric) | 22 in (metric) | 23 in (metric) | 24 in (metric) | 25 in (metric) | 26 in (metric) | 27 in (metric) | 28 in (metric) | 29 in (metric) | 30 in (metric) | 31 in (metric) | 32 in (metric) | 33 in (metric) | 34 in (metric) | 35 in (metric) | 36 in (metric) | 37 in (metric) | 38 in (metric) | 39 in (metric) | 40 in (metric) | 41 in (metric) | 42 in (metric) | 43 in (metric) | 44 in (metric) | 45 in (metric) | 46 in (metric) | 47 in (metric) | 48 in (metric) | 49 in (metric) | 50 in (metric) | 51 in (metric) | 52 in (metric) | 53 in (metric) | 54 in (metric) | 55 in (metric) | 56 in (metric) | 57 in (metric) | 58 in (metric) | 59 in (metric) | 60 in (metric) | 61 in (metric) | 62 in (metric) | 63 in (metric) | 64 in (metric) | 65 in (metric) | 66 in (metric) | 67 in (metric) | 68 in (metric) | 69 in (metric) | 70 in (metric) | 71 in (metric) | 72 in (metric) | 73 in (metric) | 74 in (metric) | 75 in (metric) | 76 in (metric) | 77 in (metric) | 78 in (metric) | 79 in (metric) | 80 in (metric) | 81 in (metric) | 82 in (metric) | 83 in (metric) | 84 in (metric) | 85 in (metric) | 86 in (metric) | 87 in (metric) | 88 in (metric) | 89 in (metric) | 90 in (metric) | 91 in (metric) | 92 in (metric) | 93 in (metric) | 94 in (metric) | 95 in (metric) | 96 in (metric) | 97 in (metric) | 98 in (metric) | 99 in (metric) | 100 in (metric) |
| spat | 4.0 × 10-16 S | 8.0 × 10-16 S | 1.2 × 10-15 S | 1.6 × 10-15 S | 2.0 × 10-15 S | 2.4 × 10-15 S | 2.8 × 10-15 S | 3.2 × 10-15 S | 3.6 × 10-15 S | 4.0 × 10-15 S | 4.4 × 10-15 S | 4.8 × 10-15 S | 5.2 × 10-15 S | 5.6 × 10-15 S | 6.0 × 10-15 S | 6.4 × 10-15 S | 6.8 × 10-15 S | 7.2 × 10-15 S | 7.6 × 10-15 S | 8.0 × 10-15 S | 8.4 × 10-15 S | 8.8 × 10-15 S | 9.2 × 10-15 S | 9.6 × 10-15 S | 1.0 × 10-14 S | 1.04 × 10-14 S | 1.08 × 10-14 S | 1.12 × 10-14 S | 1.16 × 10-14 S | 1.2 × 10-14 S | 1.24 × 10-14 S | 1.28 × 10-14 S | 1.32 × 10-14 S | 1.36 × 10-14 S | 1.4 × 10-14 S | 1.44 × 10-14 S | 1.48 × 10-14 S | 1.52 × 10-14 S | 1.56 × 10-14 S | 1.6 × 10-14 S | 1.64 × 10-14 S | 1.68 × 10-14 S | 1.72 × 10-14 S | 1.76 × 10-14 S | 1.8 × 10-14 S | 1.84 × 10-14 S | 1.88 × 10-14 S | 1.92 × 10-14 S | 1.96 × 10-14 S | 2.0 × 10-14 S | 2.04 × 10-14 S | 2.08 × 10-14 S | 2.12 × 10-14 S | 2.16 × 10-14 S | 2.2 × 10-14 S | 2.24 × 10-14 S | 2.28 × 10-14 S | 2.32 × 10-14 S | 2.36 × 10-14 S | 2.4 × 10-14 S | 2.44 × 10-14 S | 2.48 × 10-14 S | 2.52 × 10-14 S | 2.56 × 10-14 S | 2.6 × 10-14 S | 2.64 × 10-14 S | 2.68 × 10-14 S | 2.72 × 10-14 S | 2.76 × 10-14 S | 2.8 × 10-14 S | 2.84 × 10-14 S | 2.88 × 10-14 S | 2.92 × 10-14 S | 2.96 × 10-14 S | 3.0 × 10-14 S | 3.04 × 10-14 S | 3.08 × 10-14 S | 3.12 × 10-14 S | 3.16 × 10-14 S | 3.2 × 10-14 S | 3.24 × 10-14 S | 3.28 × 10-14 S | 3.32 × 10-14 S | 3.36 × 10-14 S | 3.4 × 10-14 S | 3.44 × 10-14 S | 3.48 × 10-14 S | 3.52 × 10-14 S | 3.56 × 10-14 S | 3.6 × 10-14 S | 3.64 × 10-14 S | 3.68 × 10-14 S | 3.72 × 10-14 S | 3.76 × 10-14 S | 3.8 × 10-14 S | 3.84 × 10-14 S | 3.88 × 10-14 S | 3.92 × 10-14 S | 3.96 × 10-14 S | 4.0 × 10-14 S |
A metric inch is a nickname for a preferred 1⁄4 subdivision of an ISO 2848 basic module, or 1⁄12 of a metric foot measuring 25 millimetres (0.984 in). A metric inch is 0.4 millimetres (0.016 in) shorter than an inch.
The term was similarly used to refer to the historical Soviet Bloc practice of spacing integrated circuit pins at 1⁄10 of a 25 mm "metric inch" length, instead of the western practice of 1⁄10 of an imperial inch.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| metric inch | in (metric) | = 0.016 in | = 0.0004 m | Metric system SI |
| metric inches | spats | metric inches | spats |
|---|---|---|---|
| 1 | = 4.0E-16 | 4 | = 1.6E-15 |
| 1.5 | = 6.0E-16 | 4.5 | = 1.8E-15 |
| 2 | = 8.0E-16 | 5 | = 2.0E-15 |
| 2.5 | = 1.0E-15 | 5.5 | = 2.2E-15 |
| 3 | = 1.2E-15 | 6 | = 2.4E-15 |
The spat (symbol S) is also an obsolete unit of distance used in astronomy. It is equal to 1000000000 kilometres (1 Tm or 1012 m). It is about 6.6846 astronomical units (AU), 1.057×10−4 light-years or3.240×10−5 parsecs.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| spat | S | ≡ 1×1012 m | ≡ 1×1012 m | Science - Astronomy (Length) |
| spats | metric inches | spats | metric inches |
|---|---|---|---|
| 1 | = 2.5E+15 | 4 | = 1.0E+16 |
| 1.5 | = 3.75E+15 | 4.5 | = 1.125E+16 |
| 2 | = 5.0E+15 | 5 | = 1.25E+16 |
| 2.5 | = 6.25E+15 | 5.5 | = 1.375E+16 |
| 3 | = 7.5E+15 | 6 | = 1.5E+16 |
| metric inches | spats |
|---|---|
| 1 | = 4.0 × 10-16 |
| 2.5 × 1015 | = 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 …) |