| spat | 1 S | 2 S | 3 S | 4 S | 5 S | 6 S | 7 S | 8 S | 9 S | 10 S | 11 S | 12 S | 13 S | 14 S | 15 S | 16 S | 17 S | 18 S | 19 S | 20 S | 21 S | 22 S | 23 S | 24 S | 25 S | 26 S | 27 S | 28 S | 29 S | 30 S | 31 S | 32 S | 33 S | 34 S | 35 S | 36 S | 37 S | 38 S | 39 S | 40 S | 41 S | 42 S | 43 S | 44 S | 45 S | 46 S | 47 S | 48 S | 49 S | 50 S | 51 S | 52 S | 53 S | 54 S | 55 S | 56 S | 57 S | 58 S | 59 S | 60 S | 61 S | 62 S | 63 S | 64 S | 65 S | 66 S | 67 S | 68 S | 69 S | 70 S | 71 S | 72 S | 73 S | 74 S | 75 S | 76 S | 77 S | 78 S | 79 S | 80 S | 81 S | 82 S | 83 S | 84 S | 85 S | 86 S | 87 S | 88 S | 89 S | 90 S | 91 S | 92 S | 93 S | 94 S | 95 S | 96 S | 97 S | 98 S | 99 S | 100 S |
| micrometer | 1.0 × 1018 μm | 2.0 × 1018 μm | 3.0 × 1018 μm | 4.0 × 1018 μm | 5.0 × 1018 μm | 6.0 × 1018 μm | 7.0 × 1018 μm | 8.0 × 1018 μm | 9.0 × 1018 μm | 1.0 × 1019 μm | 1.1 × 1019 μm | 1.2 × 1019 μm | 1.3 × 1019 μm | 1.4 × 1019 μm | 1.5 × 1019 μm | 1.6 × 1019 μm | 1.7 × 1019 μm | 1.8 × 1019 μm | 1.9 × 1019 μm | 2.0 × 1019 μm | 2.1 × 1019 μm | 2.2 × 1019 μm | 2.3 × 1019 μm | 2.4 × 1019 μm | 2.5 × 1019 μm | 2.6 × 1019 μm | 2.7 × 1019 μm | 2.8 × 1019 μm | 2.9 × 1019 μm | 3.0 × 1019 μm | 3.1 × 1019 μm | 3.2 × 1019 μm | 3.3 × 1019 μm | 3.4 × 1019 μm | 3.5 × 1019 μm | 3.6 × 1019 μm | 3.7 × 1019 μm | 3.8 × 1019 μm | 3.9 × 1019 μm | 4.0 × 1019 μm | 4.1 × 1019 μm | 4.2 × 1019 μm | 4.3 × 1019 μm | 4.4 × 1019 μm | 4.5 × 1019 μm | 4.6 × 1019 μm | 4.7 × 1019 μm | 4.8 × 1019 μm | 4.9 × 1019 μm | 5.0 × 1019 μm | 5.1 × 1019 μm | 5.2 × 1019 μm | 5.3 × 1019 μm | 5.4 × 1019 μm | 5.5 × 1019 μm | 5.6 × 1019 μm | 5.7 × 1019 μm | 5.8 × 1019 μm | 5.9 × 1019 μm | 6.0 × 1019 μm | 6.1 × 1019 μm | 6.2 × 1019 μm | 6.3 × 1019 μm | 6.4 × 1019 μm | 6.5 × 1019 μm | 6.6 × 1019 μm | 6.7 × 1019 μm | 6.8 × 1019 μm | 6.9 × 1019 μm | 7.0 × 1019 μm | 7.1 × 1019 μm | 7.2 × 1019 μm | 7.3 × 1019 μm | 7.4 × 1019 μm | 7.5 × 1019 μm | 7.6 × 1019 μm | 7.7 × 1019 μm | 7.8 × 1019 μm | 7.9 × 1019 μm | 8.0 × 1019 μm | 8.1 × 1019 μm | 8.2 × 1019 μm | 8.3 × 1019 μm | 8.4 × 1019 μm | 8.5 × 1019 μm | 8.6 × 1019 μm | 8.7 × 1019 μm | 8.8 × 1019 μm | 8.9 × 1019 μm | 9.0 × 1019 μm | 9.1 × 1019 μm | 9.2 × 1019 μm | 9.3 × 1019 μm | 9.4 × 1019 μm | 9.5 × 1019 μm | 9.6 × 1019 μm | 9.7 × 1019 μm | 9.8 × 1019 μm | 9.9 × 1019 μm | 1.0 × 1020 μm |
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.
| 1 spats ≡ 1.0E+18 micrometers | 4 spats ≡ 4.0E+18 micrometers |
| 1.5 spats ≡ 1.5E+18 micrometers | 4.5 spats ≡ 4.5E+18 micrometers |
| 2 spats ≡ 2.0E+18 micrometers | 5 spats ≡ 5.0E+18 micrometers |
| 2.5 spats ≡ 2.5E+18 micrometers | 5.5 spats ≡ 5.5E+18 micrometers |
| 3 spats ≡ 3.0E+18 micrometers | 6 spats ≡ 6.0E+18 micrometers |
The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling 1×10−6 of a metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).
| 1 micrometers ≡ 1.0E-18 spats | 4 micrometers ≡ 4.0E-18 spats |
| 1.5 micrometers ≡ 1.5E-18 spats | 4.5 micrometers ≡ 4.5E-18 spats |
| 2 micrometers ≡ 2.0E-18 spats | 5 micrometers ≡ 5.0E-18 spats |
| 2.5 micrometers ≡ 2.5E-18 spats | 5.5 micrometers ≡ 5.5E-18 spats |
| 3 micrometers ≡ 3.0E-18 spats | 6 micrometers ≡ 6.0E-18 spats |
| 1 spats ≡ 1.0 × 1018 micrometers |
| 1 micrometers ≡ 1.0 × 10-18 spats |