Number Base Converter

Convert numbers between any two bases (2–36).

Live Conversion

Edit any field — all others update instantly

Decimal (Base 10)

Binary (Base 2)

Octal (Base 8)

Hexadecimal (Base 16)

Bitwise Operations (with B)

Operand B (decimal)

Base Prefixes

Binary: 0b1010
Octal: 0o17
Decimal: 255
Hex: 0xFF

Bitwise Operations

AND (&): 1 only if both 1
OR (|): 1 if either is 1
XOR (^): 1 if exactly one is 1
NOT (~): flip all bits
Left shift (<<): multiply by 2
Right shift (>>): divide by 2

Scientific Notation

Numbers

About This Calculator

Convert numbers between any two bases (2–36).

Everything is worked out in your browser as you type, so your figures never leave your device.

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Pro Tips

Results update as you type — change any field to see the effect immediately.

Check that every value uses the same unit before comparing results.

Use the copy button to paste the number base converter figures into a note or spreadsheet.

Nothing is sent to a server, so you can use this with private figures.