Hex Addition Calculator

About this calculator

Hexadecimal (base 16) uses sixteen digits, 0 through 9, then A through F for the values 10 through 15, and adding two hex numbers works exactly like decimal column addition, except you carry a 1 to the next column whenever a column's sum reaches 16 instead of 10.

Hex shows up constantly in computing because it maps neatly onto binary: each hex digit represents exactly four bits, so hex is used to write memory addresses, color codes in web design (like #1E6BFF), MAC and IPv6 addresses, and low-level byte values in a far more compact and human-readable form than long strings of ones and zeros. Programmers and students doing hex arithmetic by hand need to add these values correctly when debugging memory offsets, combining color channels, or working through computer science coursework.

Enter two hexadecimal numbers and this calculator adds them together, showing the sum in both hexadecimal and decimal.