Binary to Decimal Number Converter

Last Updated : 23 Mar, 2026

A Binary to Decimal Converter is a practical tool that transforms binary numbers (0s and 1s) into their decimal equivalents with clarity and precision.

Steps to use the Binary to Decimal Converter

Step 1: Enter the binary number (using only 0s and 1s) into the input field.

Step 2: Click the Convert button to process the value (or press Enter).

Step 3: View the converted decimal result instantly, along with the bit visualization and step-by-step calculation if enabled.

Binary

Binary (Base-2):

  • Binary is a numerical system that uses only two digits: 0 and 1.
  • It forms the foundation of digital electronics and computer programming.
  • In computing, data is represented using combinations of these binary digits.

Decimal

Decimal (Base-10):

  • Decimal refers to the base-10 numerical system.
  • It utilizes ten digits from 0 to 9 to represent values.
  • In everyday mathematics, finance, and calculations, each digit’s position represents a power of 10.

How to Convert Binary to Decimal

To convert a binary number to decimal, follow these steps:

Step 1: Identify the position of each bit, starting from the rightmost bit as position 0.

Step 2: Multiply each binary digit (0 or 1) by 2 raised to the power of its position.

Step 3: Add all the resulting values to get the decimal number.

Step 4: If Signed (2’s Complement) mode is enabled and the leftmost bit is 1, subtract 2 raised to the power of the total number of bits to obtain the correct negative decimal value.

For Example: Binary number: 1101

1 * 2^3 + 1 * 2^2 + 0 * 2^1 + 1 * 2^0
= 8 + 4 + 0 + 1
= 13
So, the decimal equivalent of binary 1101 is 13.
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