Calculateur de OTP Window
Calculate one-time-password validity window from step size and allowed drift.
Formula and method
This calculator computes Validity window directly in your browser without sending data to an external server.
Mathematical formula
- Validity window:
step × (1+2 × drift)
Variables and parameters
- OTP step (step): default value 30 seconds.
- Allowed drift steps (drift): default value 1.
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 OTP Window Calculator use?
OTP Window Calculator evaluates outputs such as <strong>Validity window</strong> based on inputs including OTP step, Allowed drift steps. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into OTP Window 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 OTP Window 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 OTP Window Calculator free to use?
Yes. OTP Window Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does OTP Window Calculator store or upload my data?
No. OTP Window Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is OTP Window Calculator?
OTP Window 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 OTP Window Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of OTP Window Calculator to your own blog post or page.