Probability Calculator
Instant calculations for single events, compound events, conditional probability, combinations, permutations and binomial probability — with verifiable proof (SHA-256).
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Verifiable Proof (Blockchain‑style)
Create a tamper-evident proof of your inputs & result. This uses SHA-256 hashing in your browser — you can save or publish the proof to later verify integrity.
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Notes
- All calculations happen in your browser; no data leaves your device.
- The verifiable proof is a SHA-256 of the JSON payload ({ inputs, result, timestamp, nonce }). This is a tamper-evident, blockchain‑style proof — not stored on any blockchain by this tool.
- To publish a proof immutably, optionally add the proof hash to a real blockchain or trusted log.