Welcome to OnlineConversion.com
Number Conversions and Information
Fractions This handy calculator can convert fractions to decimal numbers, and decimal numbers to fractions.
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.
Prime Numbers Determine if a number is Prime or not.
Advanced Roman Numeral Conversion Convert between decimal and Roman Numerals.