Hex Calculator

Convert between hexadecimal and other number bases. Perform hex arithmetic operations.

Result

Fill in the fields above, then press Calculate.

A hexadecimal calculator converts between hex, decimal, binary, and octal number systems and performs arithmetic in hexadecimal.

Enter a hexadecimal value (0-9, A-F) and select an operation. For conversions, the calculator shows the equivalent in decimal, binary, and octal. For arithmetic, enter a second hex value.

Examples

Hex to Decimal

FF = 15×16 + 15 = 255

Hex addition

FF + 01 = 100 (255 + 1 = 256)

Hex to Binary

A3 = 1010 0011 = 10100011₂

Frequently Asked Questions

What is hexadecimal?
Hexadecimal (base 16) uses digits 0-9 and letters A-F. It is widely used in computing because each hex digit maps to exactly 4 binary bits.
Where is hex used?
Hex is commonly used for color codes (#FF0000 = red), memory addresses, MAC addresses, and representing binary data compactly.
How do I convert hex to decimal?
Multiply each digit by its positional power of 16 and sum. For example: 2F = 2×16 + 15 = 47.
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Quick Tips

  • •Double-check your inputs — small errors lead to incorrect results.
  • •Remember that each hex digit represents exactly 4 binary bits.
  • •Use uppercase or lowercase letters for hex digits A through F.