A gym for casino games. Free weights only.

Plinko, Dice, Limbo and Mines are the simplest games in gambling and the ones people understand least. Multipliers feel like luck; they are arithmetic. PlinkoLab is a place to play them for nothing, see the formula under every round, and check the fairness yourself, so that if you ever do play for money you know exactly what you are buying.

The rules we keep

No money, ever. Nothing to deposit, nothing to buy, no prizes. The balance is play money that resets when you ask. No pressure. No timers, no streak nags, no “you almost won”. Real odds. The games use the published formulas and multiplier tables at a 1% house edge; the practice version is not kinder than the real thing. Your seeds, your browser. The seed pair that decides every round lives in your browser; nobody else sees it.

Hold us to it

Every derivation is open to inspection and verifiable on VerifyRoll. If a round does not verify, or the site does something that feels like a casino trick, tell us. Fixes are dated in the changelog.

Last reviewed 2026-09-23