Hex Calculator – Add Hexadecimal Numbers
Free hex calculator: add two hexadecimal numbers. Enter base-16 values (0–9, A–F) and get the sum. Useful for programming, color codes, and low-level computing. No sign-up, runs in your browser.
Hex Calculator
Add two hexadecimal numbers. Use digits 0–9 and letters A–F.
How hexadecimal addition works
Hexadecimal is base-16. Each digit represents 0–15 (0–9, A–F). Addition works like decimal but with carries when a digit exceeds 15. The calculator converts hex to decimal, adds, and converts the result back to hex.
Example: 1A + FF = 26 + 255 = 281 = 119 in hex
When and why to use a hex calculator
Hexadecimal (base-16) is a compact way to represent binary data. One hex digit equals 4 bits, so two hex digits represent a byte (8 bits). Programmers use hex for memory addresses, color codes (e.g. #FF5733 in CSS), and debugging. Network engineers use it for MAC addresses and packet dumps.
A hex calculator lets you add two hex numbers without manual conversion. Enter values like 1A, FF, or 3E8—the calculator accepts both uppercase and lowercase. For binary arithmetic, use our binary calculator. For converting between number systems, a unit converter or programming environment can help.
This tool runs in your browser and does not store your inputs. It supports addition of non-negative hex numbers. Results are shown in uppercase hex for consistency.