Developer Tools
Binary Calculator
Binary — binary Calculator converts between binary and other bases by expanding each digit as a power of two, and can do binary arithmetic bit by bit. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Use Binary Calculator to convert and calculate in binary: give it your direction and value, press Calculate, and read off the value in binary and decimal — all worked out on your device.
Browser-side developer and utility helpers for everyday and learning use. Everything runs locally in your browser and nothing you enter is uploaded. Validate production or security-critical output with trusted, official tools before relying on it.
About this tool
Binary Calculator converts between binary and other bases by expanding each digit as a power of two, and can do binary arithmetic bit by bit. That is the whole of the calculation — the mistakes happen in the inputs. It matters when a format, encoding or size has to be exactly right for the system reading it. Worked example: Add binary 1010 (10) + 0110 (6): the result is 10000 = 16 in decimal. Use the calculator with your own figures; it runs entirely on your device.
How to use
- Choose decimal-to-binary or binary-to-decimal.
- Enter a whole number in the chosen base.
- Run the converter to change the value.
- Read the binary, hexadecimal, and octal forms.
Why use the Binary Calculator
Instant
Each result is computed on your device the moment you run the tool.
Private
The text and numbers you enter stay in your browser and are never uploaded.
Free
No signup and no paywall to use any tool in this set.
Works offline
Once the page has loaded it keeps working on a weak or dropped connection.
Built for developers
Plain inputs and outputs you can copy straight into code, configs, or notes.
Honest by design
Conversions and heuristics are for everyday and learning use; verify security-critical output with trusted, official tools.
Common uses
Use it for low-level and embedded programming
Use it for working with flags and masks
Use it when debugging binary data
Binary in firmware and driver tasks
Use it when converting between number bases
Use it before writing a bitwise expression
Technical notes
Binary Calculator converts between binary and other bases by expanding each digit as a power of two, and can do binary arithmetic bit by bit.
Results are reference values; validate against your own environment before relying on them in production.
Because it runs locally, results appear instantly with no server round-trip.
Worked example
Add binary 1010 (10) + 0110 (6): the result is 10000 = 16 in decimal.
FAQ
Which characters are allowed in a binary value?
Only the digits 0 and 1 are accepted; anything else is rejected so a typo cannot be misread as a smaller number.
Does it convert fractions or only whole numbers?
It converts whole, non-negative integers; decimal points and signs are not part of this base converter.
How large a number can it convert?
Values are converted exactly up to the safe integer limit; beyond that the tool reports the number is too large.
Does it also show hexadecimal?
Yes. Every conversion lists the hexadecimal and octal forms in addition to the main result.