Understanding Hexadecimal and convert from HEX to DEC

by

Understanding Hexadecimal and Decimal Systems

Before diving into conversions, let’s quickly review hexadecimal and decimal systems.

Decimal (DEC): This is the number system we use in our everyday lives. It’s base 10, meaning it uses 10 digits from 0 to 9 to represent numbers.

Hexadecimal (HEX): Unlike decimal, hexadecimal is base 16, meaning it uses 16 digits to represent numbers. These digits are 0-9 followed by A-F, where A represents 10, B represents 11, and so on up to F representing 15.

Converting HEX to DEC

Converting from hexadecimal to decimal might seem tricky, but it’s quite straightforward once you understand the process.

Let’s take an example: HEX FE63.

  1. Write Down the HEX Digits: F, E, 6, and 3.
  2. Assign Decimal Values: Replace each HEX digit with its equivalent decimal value.
    • F = 15
    • E = 14
    • 6 = 6
    • 3 = 3
  3. Multiply and Sum: Multiply each decimal value by 16 raised to the power of its position, starting from the rightmost position as 0.
    • F * 16^3 + E * 16^2 + 6 * 16^1 + 3 * 16^0
    • 15 * (16 * 16 * 16) + 14 * (16*16) + 6 * (16) + 3 * (1)
    • 15 * 4096 + 14 * 256 + 6 * 16 + 3 * 1
    • 61440 + 3584 + 96 + 3
  4. Add Up: Sum all the values.
    • 65123

So, HEX FE63 is equivalent to DEC 650123.

Tips for Easy Conversion

  1. Practice Pattern Recognition: After a while, you’ll notice patterns in HEX-DEC conversions, making mental calculations faster.
  2. Use Online Converters: Especially when dealing with complex or large numbers, online converters can be handy for quick checks.
  3. Understand Binary Conversion: Understanding how to convert between binary and hexadecimal can also aid in HEX-DEC conversions since hexadecimal is often used in conjunction with binary in computer systems.

Conclusion

Converting between hexadecimal and decimal is a useful skill, particularly in fields where computers and programming languages are prevalent. While it may seem intimidating initially, with a bit of practice, it becomes second nature. Whether you’re a programmer, engineer, or just curious about different number systems, mastering these conversions opens up a world of understanding. So, next time you encounter a hexadecimal number, don’t be intimidated – embrace the opportunity to flex your conversion skills!