Calculateur de Random ID Collision
Estimate approximate collision probability for random IDs using the birthday bound.
Formula and method
This calculator computes Approximate collision probability directly in your browser without sending data to an external server.
Mathematical formula
- Approximate collision probability:
(1-Math.exp(-(ids × (ids-1)) ÷ (2 × 2^(bits)))) × 100
Variables and parameters
- Generated IDs (ids): default value 1000000.
- Random bits (bits): default value 64 bits.
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 Random ID Collision Calculator use?
Random ID Collision Calculator evaluates outputs such as <strong>Approximate collision probability</strong> based on inputs including Generated IDs, Random bits. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Random ID Collision 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 Random ID Collision 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 Random ID Collision Calculator free to use?
Yes. Random ID Collision Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Random ID Collision Calculator store or upload my data?
No. Random ID Collision Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Random ID Collision Calculator?
Random ID Collision 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 Random ID Collision Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Random ID Collision Calculator to your own blog post or page.