About this tool
Convert whole numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36.
The input is read digit by digit into an exact big integer, then written out by repeated division by the target base. Digits above 9 use letters A–Z.
Formula: (1011)₂ = (11)₁₀ = (B)₁₆
Example: Number = 255, Input base = Decimal (10), Extra output base (2–36) = 36 → Decimal = 255, Binary = 11,111,111.
Whole numbers only (no fractions); very long numbers are supported. Prefixes 0x, 0b and 0o are accepted.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Number Base Converter (Binary, Octal, Decimal, Hex) work?
The input is read digit by digit into an exact big integer, then written out by repeated division by the target base. Digits above 9 use letters A–Z.
What should I keep in mind?
Whole numbers only (no fractions); very long numbers are supported. Prefixes 0x, 0b and 0o are accepted.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.