Binary Calculator
Do arithmetic in pure binary — add, subtract, multiply and divide strings of 0s and 1s and get exact answers in both binary and decimal. Handles large binary numbers precisely, which standard calculators simply cannot.
—
How to use
- Enter both binary numbers (only 0 and 1).
- Select the operation.
- The answer shows in both binary and decimal.
Tips
- Only 0 and 1 are allowed — any other digit triggers an error.
- Negative results show with a minus sign, not in two's complement form.
- BigInt math keeps even very long binary numbers exact.
- For text conversion instead of arithmetic, use our Binary Text Converter tool.
Note: You get exact answers even for large binary numbers because BigInt arithmetic runs behind the scenes. A negative result is shown in binary with a minus sign (not two's complement).