SI prefixes
SI prefixes represent powers of ten: kilo = 10³, milli = 10⁻³, micro = 10⁻⁶. Since 2022, ronna/ronto and quetta/quecto extend the range to 10±30.
| quetta | Q | 10³⁰ |
| ronna | R | 10²⁷ |
| kilo | k | 10³ |
| milli | m | 10⁻³ |
| micro | µ | 10⁻⁶ |
| ronto | r | 10⁻²⁷ |
| quecto | q | 10⁻³⁰ |