100010101 binary to decimal

Binary to Decimal Conversion Formula:

(Decimal Number)₁₀ = (d₀ × 2⁰) + (d₁ × 2¹) + (d₂ × 2²) + ... + (d_n−1 × 2^n-1)

According to Binary to Decimal Conversion Formula if you want to convert Binary 100010101 to its Decimal form you have to multiply each digit of the binary number by the corresponding power of two which depends on the digit position in the number.

There are 9 digits in 100010101 so there are 9 positions. So you need to write down the powers of two from right to left according to its position starting from index 0 and ending with 8 and multiply it by the corresponding binary digit.

Binary 100010101 to Decimal Calculation Steps: