Choose the page you wish to view.

Decimal number system prefixes The SI standard number prefixes for decimal. k, kilo, M, mega, and the rest, from yotta to yocto.

Large Numbers The names for numbers larger than a million. Both the American and British naming conventions. Billion, trillion, milliard, sextillion, quadrillion, many more.

Binary Digit Conversion Bytes, KiloBytes, MegaBytes, and more. For computer Memory and Hard Disk size conversions.

Number base Conversion Convert to and from binary, ternary, quintal, octal, decimal, and hexadecimal.

Advanced Roman Numeral Conversion Convert between decimal and Roman Numerals.