Convert 101 Binary to Decimal

101 binary to decimal conversion provides the detailed information on what is binary (101)2 in decimal number system, and the step-by-step work for how to convert the binary (base-2) number 101 to its decimal (base-10) equivalent.

(101)₂ binary in decimal is equal to:
101₂ = (1 x 2²) + (0 x 2¹) + (1 x 2⁰)
= 4 + 0 + 1,
= 5
101₂ = 5₁₀

Hence,
101 binary to decimal is 5.

where,
101₂ is the given binary number,
2 in 101₂ represents the base-2 or binary number system,
5 is the decimal equivalent of the binary number 101,
10 in 5₁₀ represents the base-10 or decimal number system.

Steps to convert 101 binary to decimal
The below step-by-step solution shows how to convert 111101 binary (base 2) to its equivalent decimal (base 10) number.

step 1 Observe the input parameters, values and what to be found.

Input values:
Binary Number = 101₂

What to be found:
(101)₂ = (?)₁₀
What is 101 binary in decimal?

step 2 Arrange the given binary number 101 as like the below:
= (1 x 2²) + (0 x 2¹) + (1 x 2⁰),

step 3 Resolve the powers of 2 in the above equation:
= 4 + 0 + 1,

step 3 Simplify the above equation further:
= 4 + 0 + 1,
= 5
(101)₂ = (5)₁₀

Therefore,
the decimal equivalent of the binary number 101 is 5

Important Notes: (101)2 in Decimal
The below are some of the important notes to be remembered while converting the binary number 101 into a base-10 number.

The sum of increasing power of 2 (from 0 to number of bits minus 1) for each bit of given binary number 101, that is 2⁰ multiplied with least significant digit (LSD) to 2(no. of bits - 1) multiplied with the most significant digit (MSD) of the given base-2 number provides the equivalent decimal number.

1. The right most digit in the given base-2 number 101 is a Least Significant Bit (LSB).
2. The left most digit in the given base-2 number 101 is a Most Significant Bit (MSB).
3. The LSB of 101 should be multiplied with 2⁰.
4. The MSB of 101 should be multiplied with 2^{(no. of bits - 1)}.