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Plinko Provably Fair Verifier

Recompute the Plinko path and landing bucket from your revealed seeds. Set the row count to exactly what the round used.

⚠️ Set the row count to exactly what the round used (Stake default: 8).

Computed locally via the Web Crypto API (HMAC-SHA256) — no server call. Your seeds and nonce never leave your device. It's the same code we test against Stake's own calculator.

We check more than your round. This confirms one Plinko result. Whether the generator is fair overall is what our independent RNG audits answer — millions of real rounds against NIST SP 800-22 + PractRand. Anyone can verify a round; almost nobody audits the generator.

How Plinko provably fair works

In Plinko a ball drops through rows of pegs, bouncing Left or Right at each one; the bucket it lands in is simply the number of Rights. One float decides each row, so an 8-row drop uses 8 floats, a 16-row drop uses 16.

The result comes from the standard Stake-style byte stream:

HMAC-SHA256( key = server_seed , message = "client_seed:nonce:round" )

The exact Plinko formula

For each of the rows floats: f < 0.5 → Left, otherwise Right. The bucket index is the count of Rights (0 … rows):

path   = [L/R for each row]
bucket = number of R's   →  0 … rows

This count-of-Rights is algebraically identical to Stake's slot index for rows 8–16.

Frequently asked questions

How is the Plinko bucket determined?

Each row consumes one float: below 0.5 is Left, at or above 0.5 is Right. The landing bucket equals the total number of Rights.

Why doesn't my Plinko result match?

Almost always the row count. You must set exactly the same number of rows the round used — a different row count gives a different (but still correct) result.

Does the row count change the outcome?

Yes. More rows means more floats consumed and a different path, so always match the round's row setting.

Which casinos' Plinko can I verify here?

Any Stake-style casino — Stake, Rainbet, Roobet, BC.Game, Shuffle and others share the same Plinko engine.

Formula verified bit-for-bit against Stake's reference calculator (Aug 2026). Other games: Dice · Limbo · Plinko · Mines · Keno · all verifiers. Open methodology: /methodology/. © FairPlay Audit — independent, free, open-source.