Hex ⇄ Octal Calculator
Convert Hex ⇄ Octal both ways — fast and accurate, in the browser. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
ff
Example Output
377
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the Hex ⇄ Octal Calculator
This tool converts Hex ⇄ Octal both ways in one click. Pick the direction, enter a value, and get the result with all common base representations.
It uses BigInt for large numbers. Because it is reversible, this single page covers both conversion directions.
FAQ
Is this Hex ⇄ Octal Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.