Binary to Decimal Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. Handles very large numbers with BigInt accuracy.
About this tool
Convert any whole number between binary, octal, decimal and hexadecimal in one click. Enter the value, select its base, and the tool returns the identical number in all four bases — exactly, without floating-point rounding, even for very large values.
Students debugging logic gates, developers reading network masks and hobbyists working with microcontrollers all rely on quick base conversion. The tool also accepts hex colors and binary register values as input.
FAQ
How is binary converted to decimal?
Each digit is worth powers of 2 from right to left: 1011 = 8 + 0 + 2 + 1 = 11. This converter does it instantly using BigInt.
What are binary, octal, decimal and hex?
They are bases 2, 8, 10 and 16. Computers use binary; octal and hex are compact ways for humans to read the same bits.
Can it handle huge numbers?
Yes, any integer size. The tool uses BigInt, so 64-bit and arbitrary-length values convert exactly.