International System of Units (SI) Prefixes
A complete reference from quetta 1030 to quecto 10-30, as of the most recent update in 2022.
| Prefix (Name) | Symbol | Factor (Power of 10) |
|---|---|---|
| Multiples (Larger Quantities) | ||
| quetta | Q | 1030 |
| ronna | R | 1027 |
| yotta | Y | 1024 |
| zetta | Z | 1021 |
| exa | E | 1018 |
| peta | P | 1015 |
| tera | T | 1012 |
| giga | G | 109 |
| mega | M | 106 |
| kilo | k | 103 |
| hecto | h | 102 |
| deka | da | 101 |
| Base Unit | — | 100 |
| Submultiples (Smaller Quantities) | ||
| deci | d | 10-1 |
| centi | c | 10-2 |
| milli | m | 10-3 |
| micro | 10-6 | |
| nano | n | 10-9 |
| pico | p | 10-12 |
| femto | f | 10-15 |
| atto | a | 10-18 |
| zepto | z | 10-21 |
| yocto | y | 10-24 |
| ronto | r | 10-27 |
| quecto | q | 10-30 |
For information on ciphers and other topics:
Pager Code Look Alike Cipher Tool: This is the full 26-letter system that uses visual tricks with numbers for every letter from the 1990's before texting. This cipher will translate messages into this OG secret messaging. [Try out this cipher tool on your own messages.]
Beeper Codes: Need a super-fast message? These are simple, standardized three-digit messages used as quick status updates (e.g., 143 for "I love you"). [View the Beeper Code Dictionary]
The Number Converter Utility: Convert numerals to words and words to numerals! [Type Your Number and Convert it!]
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