Programmer calculator

The developer’s workbench: live HEX/DEC/OCT/BIN conversion, 8/16/32/64-bit word sizes, bitwise operations, shifts, and an interactive clickable bit grid.

How to Programmer calculator

1. Step 1. Pick a word size (8/16/32/64-bit).
2. Step 2. Enter a value or click individual bits to toggle them.
3. Step 3. Read HEX, DEC, OCT, and BIN simultaneously.
4. Step 4. Apply bitwise operations: shift, invert, AND/OR/XOR.

Frequently asked questions

How do I convert hex to binary?

Each hex digit maps to 4 binary bits. The tool shows HEX, DEC, OCT, and BIN side by side, always in sync.

Why use 64-bit mode?

64-bit unsigned range (0–18,446,744,073,709,551,615) is needed for hashes, network masks, and low-level memory work.

Is the programmer calculator free?

Yes, free in your browser with full 64-bit BigInt precision — no precision loss on large values.