MINES CALCULATOR
Get the exact payout multiplier, win chance, and next-tile safe probability for any number of mines and tiles revealed. Uses Stake's 1% house-edge (99% RTP) formula — numbers match the casino to the cent.
Win chance = probability of revealing all selected gems safely. Next-tile safe = chance your next pick avoids a mine. Multiplier already includes the 1% house edge.
FULL PAYOUT TABLE (updates with your mine count)
| Gems Revealed | Multiplier | Win Chance |
|---|---|---|
| 1 | 1.12x | 88.00% |
| 2 | 1.29x | 77.00% |
| 3 | 1.48x | 66.96% |
| 4 | 1.71x | 57.83% |
| 5 | 2.00x | 49.57% |
| 6 | 2.35x | 42.13% |
| 7 | 2.79x | 35.48% |
| 8 | 3.35x | 29.57% |
| 9 | 4.07x | 24.35% |
| 10 | 5.00x | 19.78% |
| 11 | 6.26x | 15.83% |
| 12 | 7.96x | 12.43% |
| 13 | 10.35x | 9.57% |
| 14 | 13.80x | 7.17% |
| 15 | 18.97x | 5.22% |
| 16 | 27.11x | 3.65% |
| 17 | 40.66x | 2.43% |
| 18 | 65.06x | 1.52% |
| 19 | 113.85x | 0.87% |
| 20 | 227.70x | 0.43% |
| 21 | 569.25x | 0.17% |
| 22 | 2277.00x | 0.04% |
Default shown for 3 mines. Change the mine count above to recalculate.
HOW MINES MULTIPLIERS WORK
Mines is played on a 5×5 grid of 25 tiles. You choose how many of those tiles are mines; the rest are gems. Each gem you reveal raises your multiplier, and you can cash out at any time — but hit a mine and you lose the bet.
The multiplier after revealing k gems with M mines is the fair odds C(25,k) / C(25-M,k) reduced by a 1% house edge: multiplier = 0.99 × C(25,k) / C(25-M,k). The win chance — the probability of revealing all k gems without hitting a mine — is C(25-M,k) / C(25,k). This calculator uses exactly that math, so a 1-mine / 1-gem pick shows 1.03x and a 24-mine / 1-gem pick shows 24.75x, matching Stake precisely.
Two things never change, whatever you pick: the 1% house edge is baked into every multiplier, and each new tile is independent — past picks do not make the next tile safer. There is no pattern or system that beats the math.
Related Resources
Bankroll tools: Kelly Criterion Calculator · Rakeback Calculator
Verify a past board: Mines Provably Fair Verifier
Strategy: Mines Strategy Guide · Play: Stake Mines
More tools: House Edge Calculator · All-Games Verifier