Hex Calculator

Converter: Type in any field (hex, decimal, binary, or octal) and all other fields update automatically. You can start from any base.

Arithmetic: Enter two hexadecimal numbers in the Hex A and Hex B fields, select an operation, and the result appears in both hex and decimal. Use 0-9 and A-F (case insensitive). For example, enter "1A" for decimal 26, or "FF" for decimal 255.

Hex digits: 0 1 2 3 4 5 6 7 8 9 A B C D E F
Decimal:    0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Converting hex to decimal:
  Each position is a power of 16 (right to left: 16^0, 16^1, 16^2...)
  Example: 2AF hex
    = 2×16² + A×16¹ + F×16⁰
    = 2×256 + 10×16 + 15×1
    = 512 + 160 + 15 = 687

Converting decimal to hex:
  Divide by 16, note remainder, repeat until quotient is 0.
  Read remainders from bottom to top.
  Example: 687
    687 ÷ 16 = 42 r 15 (F)
     42 ÷ 16 =  2 r 10 (A)
      2 ÷ 16 =  0 r  2
  Result: 2AF

1 hex digit = 4 binary bits
FF hex = 11111111 binary = 255 decimal