Binary to Decimal Converter

Each binary digit is a power of two. Reading right to left, the digits stand for 1, 2, 4, 8 and so on. Add the powers where the digit is 1. For example 1010 is 8 + 0 + 2 + 0, which is 10.

No practical limit. The converter uses arbitrary-precision integers, so even hundreds of binary digits convert to the exact decimal value with no rounding.

No. Leading zeros do not affect the value, so 00001010 and 1010 both convert to 10.

Yes. Spaces, tabs and line breaks are stripped before converting, so grouped input like 1010 1010 works the same as 10101010.

Binary is base 2, the number system computers use. It has only two digits, 0 and 1, where each position is worth twice the one to its right. Decimal is base 10 and uses digits 0 through 9.

No. The conversion happens entirely in your browser, so the numbers you enter never leave your device.