Free Hex Calculator Online
This free online hex calculator performs hexadecimal arithmetic and converts between hex, decimal, binary, and octal number systems.
Hex Arithmetic
Result (Hex)
Enter hex values above
How the Hex Calculator Works
The hex calculator accepts two hexadecimal values and an arithmetic operation (add, subtract, multiply, divide). It converts hex to decimal internally, performs the calculation, and displays the result in all four bases: hexadecimal, decimal, binary, and octal.
For example, FF + 1 in the hex calculator gives 100 (hex) = 256 (decimal) = 100000000 (binary). The hex calculator handles all standard arithmetic operations on hexadecimal numbers.
The hex calculator also works as a base converter. Enter a single hex value with operation set to addition and the second value as 0 to see conversions in all bases. Use the hex calculator for programming, networking, and digital electronics work.
Hexadecimal in Computing
Hex is everywhere in programming. Colors in CSS use hex codes (#FF5733). Memory addresses are in hex. IP addresses sometimes use hex. The hex calculator helps developers work with these values efficiently.
Each hex digit maps to exactly 4 binary bits, making conversion between hex and binary trivial. F = 1111, A = 1010, 0 = 0000. The hex calculator shows this binary representation alongside every result.
Network engineers use hex for MAC addresses, IPv6 addresses, and subnet masks. The hex calculator makes arithmetic on these values straightforward without manual conversion to decimal first.
Tips for Using the Hex Calculator
No Prefix Needed
Enter hex values without 0x prefix. Just type FF, A3, or 1F2B. The hex calculator processes pure hexadecimal digits.
Case Insensitive
Enter ff or FF — both work. The hex calculator normalizes the input and shows results in uppercase.
All Bases Shown
The hex calculator displays results in hex, decimal, binary, and octal simultaneously. No need for separate conversions.
Use for Color Math
Add or subtract hex color components. The hex calculator works with the same format used in CSS color codes.
Frequently Asked Questions
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