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Binary Calculator
Add, subtract, multiply and divide binary numbers, with negative and fractional values supported.
Binary Calculator
Working: —
Result in base 2: —
Decimal check: —
How to use the Binary Calculator
- Type the first binary value and choose the operation.
- Type the second binary value and set how many fraction digits to show.
- Read the binary result together with its decimal equivalent.
Features
- Add, subtract, multiply and divide in base 2
- Exact integer arithmetic for long values
- Negative and fractional binary accepted
- Decimal equivalent shown for every result
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Frequently Asked Questions
Common questions about the free online binary calculator.
Enter the first value, set the operation to Add, enter the second value and the exact binary
sum appears at once.
Choose Subtract. The tool works out the exact result and shows the binary difference with its
decimal value.
Yes. Pick Multiply or Divide. Division is carried out to the number of fraction digits you
choose.
Yes. Type a leading minus sign before the bits, for example -1011, and the sign is carried
through the calculation.
Yes. Use a binary point such as 1011.101. Fractions that cannot terminate are rounded to the
digits you set.
Binary needs about three and a half digits for every decimal digit, so large numbers look
much longer in base 2.
Very little. Arithmetic runs on exact big integers, so values of hundreds of bits stay
correct.
Only when a division does not come out exactly. The working line then says the result was
rounded.
No. Every calculation happens in your browser and nothing you type leaves your device.
Yes. The binary calculator is completely free, unlimited and needs no account or sign-up.
Last updated: October 10, 2026