Online Hex Calculator
Perform hexadecimal arithmetic, bitwise operations, and instant base conversion. Enter values like 1A3F, 0xFF, or -2B.
Tip: For shift operations, B should be a non-negative integer (in hex). Press Enter in an input field to calculate quickly.
Fast, Accurate Hex Math in Your Browser
If you work with memory addresses, color values, firmware, networking, reverse engineering, or low-level code, you probably switch between hexadecimal, decimal, and binary all day long. This hex calculator online is built for exactly that workflow. It lets you compute results instantly without opening a desktop app or relying on error-prone manual conversion.
The tool above supports standard arithmetic and programmer-focused bitwise operations, then shows your result in three useful views: hex, decimal, and binary. That means less context switching and fewer mistakes.
What Is a Hex Calculator?
A hexadecimal calculator is a base-16 calculator. Instead of only using digits 0-9, base-16 also uses letters A-F to represent values 10 through 15. One hex digit maps perfectly to 4 binary bits (a nibble), which is why hex is so popular in computing.
Base-16 digits at a glance
- 0-9 keep their normal meaning
- A = 10
- B = 11
- C = 12
- D = 13
- E = 14
- F = 15
How to use this hex calculator online
- Enter the first value in Hex Value A.
- Choose an operation from the dropdown.
- If needed, enter Hex Value B.
- Click Calculate to get the result in hex, decimal, and binary.
If you only need conversion, choose Convert A Only and the second input is ignored automatically.
Supported operations
Arithmetic operations
- Addition:
A + B - Subtraction:
A - B - Multiplication:
A × B - Integer Division:
A ÷ B - Remainder:
A % B
Bitwise operations
- AND:
A & B - OR:
A | B - XOR:
A ^ B
Shift operations
- Left Shift:
A << B - Right Shift:
A >> B
Why developers prefer hex
Hexadecimal is compact and readable compared with raw binary. A 32-bit value takes 32 binary characters, but only 8 hex characters. This makes debugging faster and reduces transcription errors when reading registers, masks, and memory dumps.
- Great for bitmasks and flags
- Common in addresses and machine-level tooling
- Widely used in CSS colors, checksums, and protocol data
Practical examples
Example 1: Add two hex numbers
0x1A3 + 0x0F = 0x1B2.
In decimal, that is 419 + 15 = 434.
Example 2: Use a bitmask
0xF0 & 0xCC = 0xC0.
This keeps only the shared high-order bits.
Example 3: Shift for fast scaling
0x12 << 0x2 = 0x48.
Left shifting by 2 is equivalent to multiplying by 4 (for unsigned intuition).
Common mistakes to avoid
- Mixing decimal and hex unintentionally (always verify your base).
- Forgetting that division here is integer-based.
- Using negative or very large shift counts.
- Misreading lowercase and uppercase letters—both are accepted, but consistency helps.
FAQ
Can I type values with 0x?
Yes. Inputs such as FF and 0xFF are both accepted.
Does it support very large numbers?
Yes. This calculator uses BigInt for high-precision integer operations.
Can I use it as a hex to decimal converter?
Absolutely. Select Convert A Only and enter your hex value in A.
Final thoughts
A good hexadecimal calculator should be fast, dependable, and easy to read. This page gives you all three with a clean workflow for conversion, arithmetic, and bit-level logic in one place. Bookmark it, and you’ll save time every time you need quick hex math.