Number Base Converter
Convert between binary, octal, decimal, and hexadecimal. See all four bases at once. Supports large numbers.
Input base:
Frequently Asked Questions
What number bases are supported?
Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16). All four are displayed simultaneously when you enter a value in any base.
Does it support large numbers?
Yes. The converter uses BigInt internally, so it can handle numbers of arbitrary size — far beyond the 64-bit integer limit.
What is hexadecimal used for?
Hexadecimal is widely used in programming for memory addresses, color codes (#FF5733), MAC addresses, and byte representations. Each hex digit represents exactly 4 binary bits.
How do I read binary numbers?
Binary uses only 0 and 1. Each position represents a power of 2 from right to left. For example, 1010 in binary = 8+2 = 10 in decimal.