Mines Odds Calculator
18+ only. Contains affiliate links — we may earn a commission. Not for residents of the US, UK, France, Germany, Netherlands, Spain, Austria, Australia, Ontario or Vietnam. Not legal or financial advice.
Choose the board size, mine count and number of distinct picks. The calculator gives the chance of revealing only safe tiles and the total-return multiplier that would be fair at those odds. Mine positions are assumed uniformly random; tile choices do not predict where mines are.
Example inputs: replace with your own figures
Result
| Survival probability | 77% (77/100) |
|---|---|
| Fair total-return multiplier | 1.2987013× (100/77) |
| Return at assumed edge | 1.28571429× (9/7) |
18+ · Educational tool. All calculations run in your browser. Examples are not casino rates.
Example board and edge only. No casino’s actual multiplier table is supplied.
How it is calculated
- For N tiles, M mines and K distinct picks, survival P = C(N − M, K) / C(N, K) = ∏(N − M − i)/(N − i), for i = 0…K − 1.
- The fair total return is 1/P. With assumed house edge h, the illustrative return is (1 − h)/P. This includes the original stake; net profit is the return minus 1.
- Zero picks means P = 1 and return = 1×, with no edge charged. Picking more than N − M tiles has P = 0 and no defined winning multiplier. Fractions are exact; displayed decimals are rounded.
Sources GitHub: mines-odds
Reference tables
- Mines Odds: 1 Mine on a 5×5 Board
- Mines Odds: 2 Mines on a 5×5 Board
- Mines Odds: 3 Mines on a 5×5 Board
- Mines Odds: 5 Mines on a 5×5 Board
- Mines Odds: 8 Mines on a 5×5 Board
- Mines Odds: 10 Mines on a 5×5 Board
- Mines Odds: 15 Mines on a 5×5 Board
- Mines Odds: 24 Mines on a 5×5 Board
18+ · No formula removes the house edge. Do not chase losses; set limits and only use money you can afford to lose. Help and limits.
Related reading
Frequently asked questions
Does a safe pick make the next pick safer?
No. The remaining safe share falls after every safe pick when mines remain. The calculation accounts for sampling without replacement.
Is the 1% edge Mint’s payout table?
No. It is an editable illustration, not a claim about any operator. Compare with the rules and rounding in the game you are checking.
Can this tool locate mines?
No. It measures probabilities for a uniformly random board and cannot predict or reveal mine locations.
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18+ · Sponsored · T&Cs apply · Not available in restricted regions
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