Decimal value of 100111 binary number Result 100111 = 39 Explained 1 * 25 = 32 0 * 24 = 0 0 * 23 = 0 1 * 22 = 4 1 * 21 = 2 1 * 20 = 1 In result: 32 + 4 + 2 + 1 = 39