Calculateur de Backup Code Space
Calculate exact one-time backup-code search space from code count, length, and alphabet size.
Formula and method
This calculator computes Total possible codes, Per-code entropy directly in your browser without sending data to an external server.
Mathematical formula
- Total possible codes:
(BigInt(codes) × (BigInt(alphabet) × × BigInt(length))).toString() - Per-code entropy:
length × Math.log2(alphabet)
Variables and parameters
- Code count (codes): default value 10.
- Code length (length): default value 8 characters.
- Alphabet size (alphabet): default value 10.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Backup Code Space Calculator use?
Backup Code Space Calculator evaluates outputs such as <strong>Total possible codes, Per-code entropy</strong> based on inputs including Code count, Code length, Alphabet size. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Backup Code Space Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Backup Code Space Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Backup Code Space Calculator free to use?
Yes. Backup Code Space Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Backup Code Space Calculator store or upload my data?
No. Backup Code Space Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Backup Code Space Calculator?
Backup Code Space Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Backup Code Space Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Backup Code Space Calculator to your own blog post or page.