A Hexadecimal Bitwise Calculator That Shows Every Base at Once

How do I perform bitwise operations on hexadecimal numbers without juggling three tabs?

You open a hex calculator to XOR two register values. It gives you the answer in hex. You need it in binary to check the bit pattern, so you open a second tab. You want it in octal because your legacy protocol uses octal, so you open a third tab. Then your input gets rejected because you typed 0xFF instead of FF.

Oktal fixes that. It is a hexadecimal bitwise calculator that runs arithmetic (add, subtract, multiply, divide) and bitwise ops (AND, OR, XOR, NOT, left shift, right shift) on hex values, and it shows every result in four bases at the same time: hex, decimal, octal, and binary. You type 0xFF or #FF or plain FF and it works. No tabs. No conversion pass. No prefix stripping.

Below, the specific cases it is built for and how it compares to the incumbents.

How do I XOR two hex values and see the result in binary?

Type the first value into input A. Type the second into input B. Click XOR. The result appears in four panels: hex (cyan), decimal, octal (amber), and binary (phosphor green, grouped in four-bit nibbles so you can read the bits). Every panel updates as you type. There is no Submit button because there does not need to be one.

Every value has its own copy button. If you need the binary for a comment and the hex for the code, two taps and you have both.

The bitwise engine operates on 32-bit unsigned integers, matching what RapidTables does. Arithmetic uses BigInt under the hood, so large values (past the 32-bit boundary) do not overflow during add, subtract, multiply, or divide.

How do I convert hexadecimal to octal without a separate converter?

You do not convert. You read.

The octal value is already on screen, next to the hex, decimal, and binary outputs. Any time you enter a hex value or run an operation, all four bases render together. No mode switch, no dropdown, no second tool. This is the one thing most hex tools get wrong: they treat octal as an afterthought or skip it entirely.

RapidTables, the go-to bitwise calculator for a lot of developers, does not show octal. calc.50x.ca shows all four bases but does not do arithmetic. Oktal covers both sides of that gap.

What hex input formats does this calculator accept?

All of them, as long as the characters after the prefix are valid hex digits (0-9, A-F).

• FF works
• 0xFF works
• 0XFF works
• #FF works (for CSS people doing color math)

The parser strips the prefix before calculating. If you type a character that is not valid hex after the prefix, an inline error shows up under that input field telling you what is wrong, and the result panel clears so you never see a stale answer next to a broken input.

How do I left shift or right shift a hex value?

Enter the hex value in input A. Enter the shift amount as a decimal number in input B (that field accepts 0 to 64). Click the << or >> button. The result renders in all four bases, so you can confirm the bit shift visually in the binary panel while also getting the hex you need for your code.

Shifts run under 32-bit unsigned semantics. NOT is unary, so when you click NOT the second input hides itself and you get the 32-bit bitwise complement of whatever is in input A.

Can I copy a specific base without reformatting?

Yes. Each of the four output panels has its own copy button. Copy the hex, copy just the binary, copy the decimal, whichever you need. If you have the uppercase toggle on (the default) and the 0x prefix toggle on, the copied hex value respects both settings. If you want lowercase bare hex to paste into a CSS file, flip the toggles and the copied output updates.

This is the detail IDE calculators tend to miss. You get one number, usually in one format, and if you want the other base or the other case, you reformat by hand.

How is this different from RapidTables, Calculator.net, or calc.50x.ca?

Here is the short version.

RapidTables is the closest match on feature count, but it skips octal and its interface is dated. calc.50x.ca is loved for its four-base display but does no arithmetic, so you cannot use it to compute a mask, only to inspect one. Calculator.net has authority but no bitwise support. Oktal is the only option that does arithmetic, bitwise, and four-base display in a single pass, and it is the only one that accepts prefixed hex input the way developers actually type it.

When should I use this over my IDE calculator?

Use your IDE calculator when you want to stay in your editor. Use Oktal when:

• You need to see the binary bit pattern alongside a hex result (IDE calculators rarely do this well)
• You are working on mobile or a borrowed machine
• You want to copy a specific value in a specific base without reformatting
• You need octal output (Unix file permissions, old protocols)
• You want to paste 0xDEADBEEF directly without rewriting it as DEADBEEF first

It loads in under a second, does not ask for an account, does not track your values, and does not run anything on a server. The math happens in your browser.

Try it

Open Oktal and run your next register mask or XOR through it. If it handles something badly, tell us and we will fix it.

Hex math, all bases covered.