Free simulators and calculators for crash, Mines and Plinko. Understand the numbers behind the rush — no sign-up, no real money.
Nothing to deposit. Nothing to win.Verify round #7 ↗
RTP — cashoutodds reference model (3% edge)
Average loss per $1 bet
Chance to reach 2×
Predictors that work
Chance the round reaches your cash-out, at a 3% house edge.
| Cash-out target | Chance to reach it |
|---|---|
| 1.5× | 64.67% |
| 2× | 48.50% |
| 5× | 19.40% |
| 10× | 9.70% |
| 100× | 0.97% |
Whatever cash-out you pick, the expected return stays 97% in our reference model — on average you lose about $0.03 per $1 bet. 100 rounds of $1 → expected loss $3.00. Run your own numbers →
Games we explain — the mechanics, the probabilities, the edge.
01 / CRASHAviator, JetX and other crash games share the same basic mechanic: a rising multiplier, a random bust point, and a cash-out button. This site models that mechanic independently — it does not reproduce any specific provider’s real algorithm or RTP.
02 / MINES5×5 board, 3 mines, 5 safe tiles → 49.57%. Fair pay 2.0175×, game pays 1.9974× (1% edge). Ten safe tiles: 19.78%.
03 / PLINKO16 rows: middle slot 19.64%, far edge 0.0015% (1 in 65,536). A bell curve, not a lucky path.
Run thousands of play-money rounds and watch the house edge play out over time.
Exact chance and fair multiplier for any board, mine count and number of safe tiles.
The binomial curve behind every slot, for 1 to 32 rows — and the RTP of any payout table.
Stake × rounds × house edge — plus the real chance of finishing a session ahead.
How likely a bankroll is to fall below the next stake before the session ends — exact, not simulated.
Check a round from its seeds with HMAC-SHA256, entirely in your browser.
SIGNAL FOUND: NONE.Provably fair systems let you check a revealed outcome against a prior commitment. That's evidence you can inspect — not a promise that you will profit.
Transparent by design.Commit → reveal → independently check.
HMAC-SHA256 · runs in your browser
MYTHS · 6 min read
VERIFICATION · 7 min read
SIMULATION · 5 min read
PROBABILITY · 6 min read
CRASH GAMES · 5 min read
STRATEGY MYTHS · 6 min read
The things worth knowing before
you ever touch a cash-out button.
No. In a correctly implemented provably fair game the secret server seed is not available before the round. Past outcomes and a seed hash do not reveal the next multiplier.
Return to player is the theoretical average returned across a very large amount of play. In our reference model at a typical 3% house edge, that means wagering $100.00 over many rounds has an expected loss of about $3.00. It is not a promise about your session; short-term results vary a lot.
No. In our reference model, every target has the same expected return at a given house edge (97% at 3% edge). Lower targets hit more often and pay less; higher targets hit less often and pay more. Neither removes the edge.
No. cashoutodds is an independent, ad-free educational site. We take no bets, handle no deposits and link to no betting sites. Our simulator uses play money only.