faircheckprovably-fair

Verify Roulette

Provably-fair roulette maps one float onto the 37 pockets of a single-zero European wheel. Faircheck reproduces the winning pocket so you can confirm the spin was fixed by the seeds, not by the house.

Verification form

Optional · pre-commit hash check

Paste the hashed server seed the casino published before the bet. Faircheck confirms SHA-256 of your revealed seed matches it — proof the seed was locked in advance.

100% in your browser · seeds never leave this page
How Roulette is generated

The algorithm

pocket = floor(float × 37)

A single float in [0, 1) is generated from your seeds.

It is multiplied by 37 and floored to land on a pocket from 0 to 36.

Red/black and odd/even simply follow from that pocket number on a standard wheel layout.

FAQ

European or American wheel?

The Stake-method verifier uses the single-zero European wheel (0–36). American double-zero roulette is rare on crypto-casino originals.

Per casino

Verify Roulette on your casino

The math is the same everywhere, but each page is tuned to how that casino reveals its seeds.

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