A gigameter (Gm) is a multiple of a meter equal to one billion (1,000,000,000) meters.
Nanometer (nm) is one of the aliquots of the meter, which is the basic unit of the SI system. This is one billionth of a meter. One nanometer is 10-9 m. Some refer to the entity as the millimicron, but this is an old name.
| Gigameters (Gm) | Nanometers (nm) |
|---|---|
| 0.0001 Gm | 1E+14 nm |
| 0.001 Gm | 1E+15 nm |
| 0.01 Gm | 1E+16 nm |
| 0.1 Gm | 1E+17 nm |
| 1 Gm | 1E+18 nm |
| 3 Gm | 3E+18 nm |
| 5 Gm | 5E+18 nm |
| 10 Gm | 1E+19 nm |
| 15 Gm | 1.5E+19 nm |
| 50 Gm | 5E+19 nm |
| 100 Gm | 1E+20 nm |
| 1000 Gm | 1E+21 nm |
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