About Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Enter a value in any base and see its equivalent in the others — essential for programming, networking, and low-level work.
How to Use
- Enter the number in its current base.
- Select the base you are entering (binary, octal, decimal, or hex).
- Read the value in all the other bases.
- Copy whichever representation you need.
Why Use This Tool?
- Accurate — built on precise, well-tested mathematical formulas.
- Instant — all calculations happen client-side for zero latency.
- Private — no data is sent to any server; your information stays on your device.
- Free — no sign-up, no limits, no hidden costs.
Frequently Asked Questions
How do I convert decimal to binary?
Repeatedly divide the decimal number by 2 and read the remainders from bottom to top. For example, 13 → 1101 in binary. This tool does it instantly.
What is hexadecimal used for?
Hex (base 16) is a compact way to write binary — each hex digit maps to 4 bits. It is widely used for colour codes (#FF8800), memory addresses, and byte values.
What do the prefixes 0x and 0b mean?
0x marks a hexadecimal number (0x1F = 31) and 0b marks a binary number (0b1010 = 10). They tell the reader (and the compiler) which base the digits are in.