To read binary numbers, and convert them to their decimal equivalent, you have two options: you can either use the Binary to Decimal Converter at ConvertBinary.com, or you can do it manually. In short, to convert binary numbers to decimal numbers, you have to multiply each binary digit by two to the power of its place number, from right to left, and then add all the results together. When calculating the place number the rightmost digit place number has value zero. So for example, if you want to convert binary 1010 to decimal, you start with the rightmost 0. Let's do it with binary 1010: 0 × 20 = 0 1 × 21 = 2 0 × 22 = 0 1 × 23 = 8 Add 0+2+0+8 and you get decimal 10.