Our free Hex Calculator makes it easy to convert between decimal and hexadecimal numbers, and also perform basic arithmetic operations in hexadecimal format. Whether you need to convert values like 255 → FF, or calculate sums, differences, multiplications, and divisions of hex numbers, this tool provides quick and accurate results. It is fully mobile-friendly, works perfectly in WordPress, and requires no extra setup. Students, programmers, and professionals can use this online hex calculator for computer science tasks, debugging, and digital logic problems. Simply enter your numbers, choose the mode, and get instant answers in both hex and decimal formats.