Numeral systems

Binary, octal, decimal, hexadecimal, base 36, and Roman numerals.

6 units

1 Decimal = 1 Hexadecimal

Quick table

Sample conversions from Decimal to Hexadecimal
dechex
11
22
88
10A
1610
3220
6440
10064
255FF
1024400

How this system works

Positional bases are not physical units, but they are rival systems for writing the same integer. Binary, octal, and hex are the computing trio; Roman numerals are additive and only cover 1–3,999 here. Input is treated as a whole number.

Base unit: integer. Decimal is Other; Hexadecimal is Other.

History and fun facts

All converters

33 families · pick another system above.