Binary to Decimal Converter

Binary (base 2) has only the digits 0 and 1. Each place is worth a power of two: 1, 2, 4, 8, 16, 32, 64, 128 and so on, from right to left. Add up the places that hold a 1.

Worked example

Convert 10110110: 128 + 32 + 16 + 4 + 2 = 182.

Tips

• Spaces and underscores are ignored, so 1011 0110 works.
• Click bits in the grid to flip them and watch the other bases update.
• With Signed ticked and 8 bits, the same pattern reads as 182 - 256 = -74, because the top bit is the sign.

• Hex to decimal · Decimal to hex
• Binary to decimal · Decimal to binary
• Hex to binary · Binary to hex
• Full programmer calculator with bitwise operations, floats and timestamps