Hexadecimal arithmetic made simple
Enter two hexadecimal numbers (digits 0-9 and letters A-F) and choose add, subtract, multiply, or divide. The calculation happens in decimal behind the scenes and the result is shown back in both hex and decimal - useful for color codes, memory addresses, and other base-16 values that come up regularly in programming and networking.
Why hexadecimal shows up so often in computing
Hex is popular because it maps cleanly onto binary - each single hex digit represents exactly 4 binary bits, so a byte (8 bits) is always exactly two hex digits. That clean mapping is why memory addresses, color codes (like #FF5733), and low-level debugging output are conventionally written in hex rather than decimal, even though the underlying values are the same.
Why the result appears in both hex and decimal
Showing both forms side by side lets you immediately sanity-check the hex result against a more familiar decimal number, and also means you don't need a separate converter if the context you're working in (a spreadsheet formula, for instance) calls for the decimal value instead of hex.
Division behavior worth knowing
Hex division here truncates to a whole number rather than returning a fractional or remainder result - so dividing F (15) by 4 returns 3, not 3.75 or "3 remainder 3". Keep this in mind if your calculation depends on an exact fractional result.