Binary Calculator
Perform addition, subtraction, multiplication, and division directly on binary numbers, with exact BigInt-based arithmetic.
Enter two binary numbers and an operation - this tool calculates the exact result using BigInt arithmetic, avoiding floating-point overflow on large values.
Results are shown in both binary and decimal so you can verify the calculation either way.
Why Use BigInt for This?
JavaScript's standard number type loses precision beyond about 2^53 - for binary numbers with many digits, that error would silently corrupt the result. This calculator uses JavaScript's BigInt type internally, giving exact results regardless of how large the binary values are.
How to Use It
- Enter two binary numbers (digits 0 and 1 only).
- Choose an operation: add, subtract, multiply, or divide.
- View the exact result in both binary and decimal.
Handling Invalid Input
Any character other than 0 or 1 is flagged immediately - this tool never silently interprets an invalid binary string as if it were valid.
Limitations
Division follows integer division (results are truncated, not fractional) since binary as entered here represents whole numbers - there's no binary point/fraction support.