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Number Base Converter
Convert whole numbers between binary, octal, decimal, hexadecimal and base 36 exactly.
Your result
A little input. A useful result.
Adjust the example inputs, then select Convert number.
About this tool
Translate integer values between common number bases without floating-point rounding. BigInt arithmetic preserves integers larger than JavaScript’s normal safe-number limit. Negative numbers and matching 0b, 0o or 0x prefixes are supported.
How to use it
- 1
Enter an integer and select its current number base.
- 2
Choose the base you want to convert it to.
- 3
Convert and copy the exact integer result.
Questions, answered
Are large integers exact?
Yes. The conversion uses arbitrary-precision integers and accepts up to 4,096 input characters. It does not pass your number through floating-point arithmetic.
Does it support fractions or two’s complement?
No. It converts signed whole-number values. Negative output has a minus sign; it is not a fixed-width two’s-complement bit pattern.