Decimal value of 100101 binary number Result 100101 = 37 Explained 1 * 25 = 32 0 * 24 = 0 0 * 23 = 0 1 * 22 = 4 0 * 21 = 0 1 * 20 = 1 In result: 32 + 4 + 1 = 37