| nanometer | 1 nm | 2 nm | 3 nm | 4 nm | 5 nm | 6 nm | 7 nm | 8 nm | 9 nm | 10 nm | 11 nm | 12 nm | 13 nm | 14 nm | 15 nm | 16 nm | 17 nm | 18 nm | 19 nm | 20 nm | 21 nm | 22 nm | 23 nm | 24 nm | 25 nm | 26 nm | 27 nm | 28 nm | 29 nm | 30 nm | 31 nm | 32 nm | 33 nm | 34 nm | 35 nm | 36 nm | 37 nm | 38 nm | 39 nm | 40 nm | 41 nm | 42 nm | 43 nm | 44 nm | 45 nm | 46 nm | 47 nm | 48 nm | 49 nm | 50 nm | 51 nm | 52 nm | 53 nm | 54 nm | 55 nm | 56 nm | 57 nm | 58 nm | 59 nm | 60 nm | 61 nm | 62 nm | 63 nm | 64 nm | 65 nm | 66 nm | 67 nm | 68 nm | 69 nm | 70 nm | 71 nm | 72 nm | 73 nm | 74 nm | 75 nm | 76 nm | 77 nm | 78 nm | 79 nm | 80 nm | 81 nm | 82 nm | 83 nm | 84 nm | 85 nm | 86 nm | 87 nm | 88 nm | 89 nm | 90 nm | 91 nm | 92 nm | 93 nm | 94 nm | 95 nm | 96 nm | 97 nm | 98 nm | 99 nm | 100 nm |
| spat | 1.0 × 10-21 S | 2.0 × 10-21 S | 3.0 × 10-21 S | 4.0 × 10-21 S | 5.0 × 10-21 S | 6.0 × 10-21 S | 7.0 × 10-21 S | 8.0 × 10-21 S | 9.0 × 10-21 S | 1.0 × 10-20 S | 1.1 × 10-20 S | 1.2 × 10-20 S | 1.3 × 10-20 S | 1.4 × 10-20 S | 1.5 × 10-20 S | 1.6 × 10-20 S | 1.7 × 10-20 S | 1.8 × 10-20 S | 1.9 × 10-20 S | 2.0 × 10-20 S | 2.1 × 10-20 S | 2.2 × 10-20 S | 2.3 × 10-20 S | 2.4 × 10-20 S | 2.5 × 10-20 S | 2.6 × 10-20 S | 2.7 × 10-20 S | 2.8 × 10-20 S | 2.9 × 10-20 S | 3.0 × 10-20 S | 3.1 × 10-20 S | 3.2 × 10-20 S | 3.3 × 10-20 S | 3.4 × 10-20 S | 3.5 × 10-20 S | 3.6 × 10-20 S | 3.7 × 10-20 S | 3.8 × 10-20 S | 3.9 × 10-20 S | 4.0 × 10-20 S | 4.1 × 10-20 S | 4.2 × 10-20 S | 4.3 × 10-20 S | 4.4 × 10-20 S | 4.5 × 10-20 S | 4.6 × 10-20 S | 4.7 × 10-20 S | 4.8 × 10-20 S | 4.9 × 10-20 S | 5.0 × 10-20 S | 5.1 × 10-20 S | 5.2 × 10-20 S | 5.3 × 10-20 S | 5.4 × 10-20 S | 5.5 × 10-20 S | 5.6 × 10-20 S | 5.7 × 10-20 S | 5.8 × 10-20 S | 5.9 × 10-20 S | 6.0 × 10-20 S | 6.1 × 10-20 S | 6.2 × 10-20 S | 6.3 × 10-20 S | 6.4 × 10-20 S | 6.5 × 10-20 S | 6.6 × 10-20 S | 6.7 × 10-20 S | 6.8 × 10-20 S | 6.9 × 10-20 S | 7.0 × 10-20 S | 7.1 × 10-20 S | 7.2 × 10-20 S | 7.3 × 10-20 S | 7.4 × 10-20 S | 7.5 × 10-20 S | 7.6 × 10-20 S | 7.7 × 10-20 S | 7.8 × 10-20 S | 7.9 × 10-20 S | 8.0 × 10-20 S | 8.1 × 10-20 S | 8.2 × 10-20 S | 8.3 × 10-20 S | 8.4 × 10-20 S | 8.5 × 10-20 S | 8.6 × 10-20 S | 8.7 × 10-20 S | 8.8 × 10-20 S | 8.9 × 10-20 S | 9.0 × 10-20 S | 9.1 × 10-20 S | 9.2 × 10-20 S | 9.3 × 10-20 S | 9.4 × 10-20 S | 9.5 × 10-20 S | 9.6 × 10-20 S | 9.7 × 10-20 S | 9.8 × 10-20 S | 9.9 × 10-20 S | 1.0 × 10-19 S |
The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth of a metre (0.000000001 m). The name combines the SI prefix nano- (from the Ancient Greek νάνος, nanos, "dwarf") with the parent unit name metre (from Greek μέτρον, metrοn, "unit of measurement"). It can be written in scientific notation as 1×10−9 m, in engineering notation as 1 E−9 m, and is simply 1/1000000000 metres.
| 1 nanometers ≡ 1.0E-21 spats | 4 nanometers ≡ 4.0E-21 spats |
| 1.5 nanometers ≡ 1.5E-21 spats | 4.5 nanometers ≡ 4.5E-21 spats |
| 2 nanometers ≡ 2.0E-21 spats | 5 nanometers ≡ 5.0E-21 spats |
| 2.5 nanometers ≡ 2.5E-21 spats | 5.5 nanometers ≡ 5.5E-21 spats |
| 3 nanometers ≡ 3.0E-21 spats | 6 nanometers ≡ 6.0E-21 spats |
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+21 nanometers | 4 spats ≡ 4.0E+21 nanometers |
| 1.5 spats ≡ 1.5E+21 nanometers | 4.5 spats ≡ 4.5E+21 nanometers |
| 2 spats ≡ 2.0E+21 nanometers | 5 spats ≡ 5.0E+21 nanometers |
| 2.5 spats ≡ 2.5E+21 nanometers | 5.5 spats ≡ 5.5E+21 nanometers |
| 3 spats ≡ 3.0E+21 nanometers | 6 spats ≡ 6.0E+21 nanometers |
| 1 nanometers ≡ 1.0 × 10-21 spats |
| 1 spats ≡ 1.0 × 1021 nanometers |