Every digit of numbers too big for a normal calculator, and their names in English
Type or paste numbers: Enter for =, Backspace to delete, Esc to clear. Commas and spaces in a pasted number are skipped.
nine sextillion
The whole-number part, before the decimal point.
Quadrillion (1015), then quintillion (1018), sextillion (1021), septillion (1024), octillion (1027), nonillion (1030) and decillion (1033). Each name is a thousand times the one before it. The table below goes all the way to centillion.
Results can have up to 3,003 digits before the decimal point, which is as far as the English names go: the last one, novenonagintanongentillion, is 103000. Adding, subtracting and multiplying are exact, with no rounding at all. Division works to 100 significant digits, and results show up to 100 decimal places.
Up to vigintillion (1063) the calculator uses the everyday names. Past that it builds each name from Latin numbers with the Conway–Wechsler system, from John Conway and Richard Guy's The Book of Numbers (1996). That is how every power of a thousand up to 103000 gets a name. Some lists shorten a few of them, writing quinvigintillion for quinquavigintillion.
No. A googol is 1 followed by 100 zeros (10100), which is ten duotrigintillion. The name was coined by the nine-year-old nephew of the mathematician Edward Kasner.
In the older long scale, still used in many European languages, yes: a billion there is 1012. This calculator uses the short scale that English uses today, where a billion is a thousand million (109) and each new name is a thousand times bigger.
No. The calculator runs in your browser, so your numbers never reach my server. My site's analytics counts that the calculator was used, the same way it counts page views, but never what you typed.
Short scale, as used in English. Each name is a thousand times the one before it.
| Name | Power of ten | Zeros |
|---|---|---|
| thousand | 103 | 3 |
| million | 106 | 6 |
| billion | 109 | 9 |
| trillion | 1012 | 12 |
| quadrillion | 1015 | 15 |
| quintillion | 1018 | 18 |
| sextillion | 1021 | 21 |
| septillion | 1024 | 24 |
| octillion | 1027 | 27 |
| nonillion | 1030 | 30 |
| decillion | 1033 | 33 |
| undecillion | 1036 | 36 |
| duodecillion | 1039 | 39 |
| tredecillion | 1042 | 42 |
| quattuordecillion | 1045 | 45 |
| quindecillion | 1048 | 48 |
| sexdecillion | 1051 | 51 |
| septendecillion | 1054 | 54 |
| octodecillion | 1057 | 57 |
| novemdecillion | 1060 | 60 |
| vigintillion | 1063 | 63 |
| trigintillion | 1093 | 93 |
| quadragintillion | 10123 | 123 |
| quinquagintillion | 10153 | 153 |
| sexagintillion | 10183 | 183 |
| septuagintillion | 10213 | 213 |
| octogintillion | 10243 | 243 |
| nonagintillion | 10273 | 273 |
| centillion | 10303 | 303 |
For everyday sums, my regular calculator is quicker. Both can go in the Tools menu on my homepage, next to a speed test, a password generator, a file converter and more.