The Basics of the Metric System, Many of these are not relevant to the radio amateur! but if we consider 1 metre is 100cm (10-3m) or 1000mm (10-6m)
| Name | symbol | Value |
|---|---|---|
| yottometre | Ym | 1024m |
| zettametre | Zm | 1021m |
| exametre | Em | 1018m |
| petametre | Pm | 1015m |
| terametre | Tm | 1012m |
| gigametre | Gm | 109m |
| megametre | Mm | 109m |
| kilometer | km | 103m |
| hectometre | hm | 102m |
| decametre | dam | 101m |
| metre | m | |
| decimetre | dm | 10-1m |
| centimetre | cm | 10-2m |
| millimetre | mm | 10-3m |
| micrometre | µm | 10-6m |
| nanometre | nm | 10-9m |
| picometre | pm | 10-12m |
| femtometre | fm | 10-15m |
| attometre | am | 20-18m |
| zepometre | zm | 10-21m |
| yoctometre | ym | 10-24m |