Free tool

Mines calculator

Choose how many mines are hidden and how many gems you want to open. See the exact multiplier, the real chance of getting there, and every step in between.

Mines on the boardGems to openBetSOL

Multiplier after 3 gems

1.47×

Chance to get there

66.96% · 1 in 1.5

Cash-out if you make it

0.1470 SOL

Chance of surviving each pick, 3 mines

Gems opened

Gems	Multiplier	Chance	Cash-out
1	1.12×	88.00%	0.1120
2	1.28×	77.00%	0.1280
3	1.47×	66.96%	0.1470
4	1.71×	57.83%	0.1710
5	1.99×	49.57%	0.1990
6	2.34×	42.13%	0.2340
7	2.79×	35.48%	0.2790
8	3.34×	29.57%	0.3340
9	4.06×	24.35%	0.4060
10	5.00×	19.78%	0.5000
11	6.25×	15.83%	0.6250
12	7.96×	12.43%	0.7960
13	10.35×	9.57%	1.0350
14	13.80×	7.17%	1.3800
15	18.97×	5.22%	1.8970
16	27.10×	3.65%	2.7100
17	40.66×	2.43%	4.0660
18	65.05×	1.52%	6.5050
19	113.85×	0.87%	11.3850
20	227.70×	0.43%	22.7700
21	569.25×	0.17%	56.9250
22	2277.00×	0.04%	227.7000

The maths behind every Mines multiplier

The board has 25 tiles. With M mines, your first pick is safe with probability (25 − M) ÷ 25, the second with (24 − M) ÷ 24, and so on. Multiply those together to get the chance of surviving k picks. The multiplier is simply one over that chance, times 0.99, rounded down to two decimals. That is why every step returns the same 99% on average, and why no stopping point is better than another.

Mines	1st gem pays	Chance	3 gems pay	Chance
1	1.03×	96.0%	1.12×	88.00% (1 in 1.1)
3	1.12×	88.0%	1.47×	66.96% (1 in 1.5)
5	1.23×	80.0%	1.99×	49.57% (1 in 2.0)
10	1.65×	60.0%	5.00×	19.78% (1 in 5.1)
24	24.75×	4.0%	—	—

Few mines or many?

One mine is a slow climb: 1.03× per early gem, with a 96% chance each time. 24 mines is a single coin toss with long odds: one safe tile out of 25, paying 24.75×. Everything in between is a trade between how often you cash out and how much you cash out. Our Mines guide goes through when people usually stop, and why the board can't change after you press Bet.

Questions

How is the Mines multiplier calculated?

It is the exact odds of surviving that many picks, less a 1% house edge. With 3 mines, the first gem is a 22-in-25 chance, so it pays 25 ÷ 22 × 0.99 = 1.12×.

What is the best number of mines?

There isn't one. Every setup returns 99% of your stake on average. More mines means bigger multipliers per gem but a much smaller chance of surviving each pick.

Does it matter which tiles I click?

No. The mines are placed when you press Bet, and every unopened tile is equally likely to hide one. Patterns, corners or the middle make no difference.

Does this work for other Mines games?

For any 5×5 Mines game with a 1% edge, yes. Games with a different edge or board size will have slightly different multipliers.