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Number Base Converter Guide

About this tool

Convert a number between binary, octal, decimal, hexadecimal and any base up to 36, working on the digits directly so long values are not rounded by floating point.

Questions

Why does the value not change when I paste a very long number?
Because it should not. This converter works on the digits rather than through a floating-point number, so a 64-bit value keeps every digit — which is the whole reason to use it instead of a calculator.
How are values above 9 written in base 36?
With the letters A–Z after the digits, so 35 is Z and 36 is 10.