Mines calculator
Set the mine count, how many safe tiles you want to open, and the RTP. You get the chance of clearing all of them, the multiplier a zero-edge game would pay, and the one a casino pays at that RTP. It only does the odds and cannot tell you where the mines are.
Calculator
- Survive 5 picks
- 49.57%1 in 2
- Fair multiplier
- 2.0175×1 / chance
- At 99% RTP
- 1.9974×RTP / chance
| Picks | Chance | Fair | At RTP |
|---|---|---|---|
| 1 | 88.00% | 1.1364× | 1.125× |
| 2 | 77.00% | 1.2987× | 1.2857× |
| 3 | 66.96% | 1.4935× | 1.4786× |
| 4 | 57.83% | 1.7293× | 1.712× |
| 5 | 49.57% | 2.0175× | 1.9974× |
| 6 | 42.13% | 2.3736× | 2.3498× |
| 7 | 35.48% | 2.8186× | 2.7904× |
| 8 | 29.57% | 3.3824× | 3.3485× |
| 9 | 24.35% | 4.1071× | 4.0661× |
| 10 | 19.78% | 5.0549× | 5.0044× |
| 11 | 15.83% | 6.3187× | 6.2555× |
| 12 | 12.43% | 8.042× | 7.9615× |
| 13 | 9.57% | 10.45× | 10.35× |
| 14 | 7.17% | 13.94× | 13.8× |
| 15 | 5.22% | 19.17× | 18.98× |
| 16 | 3.65% | 27.38× | 27.11× |
| 17 | 2.43% | 41.07× | 40.66× |
| 18 | 1.52% | 65.71× | 65.06× |
| 19 | 0.870% | 115.0× | 113.8× |
| 20 | 0.435% | 230.0× | 227.7× |
| 21 | 0.174% | 575.0× | 569.3× |
| 22 | 0.0435% | 2,300× | 2,277× |
Formula: C(25 − mines, picks) / C(25, picks). Casinos set their own RTP; check the game's rules screen.
Runs in your browser. Nothing you type is sent or stored.
How to use it
Start with Mines, 1 to 24, or drag the slider. Then put in the number of tiles you plan to click before cashing out. The box caps itself at 25 minus your mines, since that's every safe tile there is. Leave RTP at 99 unless the game's info panel says something else, and some originals at other sites do run lower.
The table under the results lists every pick for the mine count you chose, with your own pick highlighted in yellow. Read down it before a round and decide where you stop. Nothing you type leaves the browser.
- Survive all picks
- C(25 − m, k) over C(25, k), where m = mines and k = picks
- Fair multiplier
- 1 ÷ chance
- At RTP
- RTP ÷ chance, e.g. 0.99 ÷ chance
- Next tile safe
- (25 − mines − picks) ÷ (25 − picks)
- Board
- 25 tiles, mines placed before the first click
Worked example: 4 mines
| Picks | Chance to get here | Pays | Chance the next tile is safe |
|---|---|---|---|
| 1 | 84.00% | 1.1786× | 83.33% |
| 2 | 70.00% | 1.4143× | 82.61% |
| 3 | 57.83% | 1.712× | 81.82% |
| 4 | 47.31% | 2.0925× | 80.95% |
| 5 | 38.30% | 2.5848× | 80.00% |
| 6 | 30.64% | 3.231× | 78.95% |
| 7 | 24.19% | 4.0926× | 77.78% |
| 8 | 18.81% | 5.262× | 76.47% |
Worked out in calc.py on 2026-11-12, rounded like the calculator rounds. A shuffle test on a million random boards with 4 mines and 6 picks survived 306,979 times (30.70%), against 30.64% from the formula.
Say you've cleared five tiles and the screen shows 2.5848×. The sixth click is safe 80% of the time and moves you to 3.231×. Multiply those two and you land back on 2.5848, to the fourth decimal, at every row of the table.
So clicking on doesn't cost you anything extra on average. The 1% was charged once, when the round started, and every later click is a straight bet of what's on the screen at true odds. The risk does grow though. At pick 8 you're putting 5.262× on a tile that has almost a one in four chance of ending it.
Decide on your cash-out row before the first click. With 4.0926× already showing, stopping at the number you planned gets a lot harder.
Predictors and other limits
Any closed tile is as likely as the next to hide a mine. The calculator treats the board that way because the game does: positions get shuffled from the seeds before you click. Apps and bots calling themselves Mines predictors claim to read that shuffle in advance. They can't, and the usual catch is that they want your login or a deposit first.
18+. Whatever you set, each Mines round carries the house edge. Only play with money you can afford to lose. Support: Responsible gaming. We have no tie to Stake, and all names belong to their owners.
Questions
Why does the calculator show a different multiplier than my casino?
Check the RTP field first. A game at 98% pays 0.98 ÷ chance, not 0.99 ÷ chance. If the RTP matches and the numbers still differ, the casino may round down or use its own table.
Does a Mines calculator predict where the mines are?
No. It only gives odds. The seeds and the round counter fix the board before your first click, and the casino keeps its own seed secret until you change the pair.
How likely is the first click to be a mine?
Take mines ÷ 25. That gives 16% for 4 mines and 48% for 12.
Should I cash out early?
Not on average. At a fixed RTP every extra click returns what you risk, so the expected result of the round stays the same. Cashing out early gives smaller and more frequent wins.
Sources
- Stake: Mines game page (Wayback, 25 Oct 2026) · current page on stake.com. Lists 99.00% RTP (1.00% edge). We cite the archive because the live page blocks our fetcher. Checked 12 November 2026
- Stake: provably fair game events (Wayback, 19 Jul 2025). Mines section: seeds place every mine, and a spot is never used twice Checked 12 November 2026
18+ · Play responsibly · gamblingtherapy.org