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CCNA HUB > Blog > IP Fundamentals > Decimal, Binary, and Hexadecimal Conversion > How to Convert Binary to Decimal

How to Convert Binary to Decimal

By Imad Daou Leave a Comment

Post Views: 7,301

CCNA Routing and Switching
<< IP and Network Fundamentals Course
>> Decimal, Binary, and Hex Conversion Section

section table
  1. Understanding Base Number Systems
  2. How to Convert Decimal to Binary
  3. How to Convert Decimal to Hexadecimal
  4. How to Convert Binary to Decimal
  5. How to Convert Binary to Hexadecimal
  6. How to Convert Hexadecimal to Decimal
  7. How to Convert Hexadecimal to Binary
Image Source
Image Source

Did I mention that converting Binary to Decimal is more fun? Yes, How to Convert Binary to Decimal will show you in few easy steps what Binary to Decimal conversion is all about. As you probably already noticed, I have dedicated for each Base System 2 articles to cover all conversion scenario, therefore, I highly recommend you first read Base 10 System conversion article, before going through the Binary conversion to decimal or hexadecimal steps.

Converting Binary to Decimal

Converting binary to decimal is more fun and easier than converting Decimal to Binary.

E.g. convert 10001110 binary to decimal

Step 1: write down the Binary chart, and plug the binary starting from right to left.

128  64  32  16  8  4  2  1
  1   0   0   0  1  1  1  0

Step 2: add only the ON places; remember that 1 turns ON the Place above it. 128 + 8 + 4 + 2 = 142.

Therefore, 10001110 equal to 142 Decimal.

Note: the steps will be minimized with the next examples.

Convert 101101 Binary to Decimal

Step 1: write down the binary chart, and plug the binary starting from right to left.

128  64  32  16  8  4  2  1
  0   0   1   0  1  1  0  1

Step 2: add only the ON places. 32 + 8 + 4 + 1 = 45

Always drop the Left leading Zeros when you write your answer.

Therefore, 101101 equal to 45 decimal.

Convert 10101110 to Decimal

Step 1: write down the binary chart, and plug the binary starting from right to left.

128  64  32  16  8  4  2  1
  1   0   1   0  1  1  1  0

Step 2: add only the ON places. 128 + 32 + 8 + 4 + 2 = 174

Therefore, 10101110 equal to 174 decimal.

Convert 11011001 to Decimal

Step 1: write down the binary chart, and plug the binary starting from right to left.

128  64  32  16  8  4  2  1
  1   1   0   1  1  0  0  1

Step 2: add only the ON places. 128 + 64 + 16 + 8 + 1 = 217

Therefore, 11011001 equal to 217 decimal.

Convert 1011 to Decimal

Step 1: Try to answer without the binary chart.

Step 2: write down nibble 1011 on a piece of paper and add only the ON places.

8 + 2 + 1 = 11

1011 = 11

Therefore, 1011 equal to 11 decimal.

Binary to Decimal and Hex Chart

After this practice, you should be able to know by heart all nibbles’ decimal value from 0000 (0) up to 1111 (15), and nibbles’ Hex value from 1010 (A) up to 1111 (F).

  • 0 = 0000
  • 1 = 0001
  • 2 = 0010
  • 3 = 0011
  • 4 = 0100
  • 5 = 0101
  • 6 = 0110
  • 7 = 0111
  • 8 = 1000
  • 9 = 1001
  • 10 = 1010 = A
  • 11 = 1011 = B
  • 12 = 1100 = C
  • 13 = 1101 = D
  • 14 = 1110 = E
  • 15 = 1111 = F

Subject Related

By Wikipedia Binary | Math is Fun | Numbers Better Explained | Free Online Calculator | R&S ICND1 and ICND2 | Introduction To Network | Practical Packet | Computer Network | Introduction to Networking | Who is Running the Internet | Networking Self-Teaching Guide

CCNA Routing and Switching
<< IP and Network Fundamentals Course
>> Decimal, Binary, and Hex Conversion Section

section table
  1. Understanding Base Number Systems
  2. How to Convert Decimal to Binary
  3. How to Convert Decimal to Hexadecimal
  4. How to Convert Binary to Decimal
  5. How to Convert Binary to Hexadecimal
  6. How to Convert Hexadecimal to Decimal
  7. How to Convert Hexadecimal to Binary
  • Was this information helpful?
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Filed Under: IP Fundamentals, Decimal, Binary, and Hexadecimal Conversion Tagged With: Binary, Decimal, Hexadecimal

About Imad Daou

CCNA HUB Founder, Imad has been in IT field since 2007. Currently holding A+, Network+, Server+, Security+, and Storage+. HP, Dell, and IBM Hardware Certified. Pursuing Linux+, LPIC-2, RHCSA, RHCE, AWS, CCNA, and JNCIA.

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