Towers calculator
Describe a tower by the tiles in each row and how many of them are safe. You get the exact chance of climbing any number of rows, and the multiplier that the RTP of your game implies for it.
Optional. Pick a casino and a title, and the calculator uses the RTP in our data for it. Only titles with an RTP figure are listed.
A generic value. Change it to the RTP your game shows.
Set the tiles the way your game lays them out. Difficulty levels usually change the number of safe tiles.
This multiplier is worked back from an RTP of 99.0% and the chance of the climb. It is not read from any game, and a game can pay differently on each row.
Tower odds row by row
| Rows climbed | Exact chance | About | Multiplier at this RTP |
|---|---|---|---|
| 1 | 66.67% | 1 in 1.5 | 1.49x |
| 2 | 44.44% | 1 in 2.3 | 2.23x |
| 3 | 29.63% | 1 in 3.4 | 3.34x |
| 4 | 19.75% | 1 in 5.1 | 5.01x |
| 5 | 13.17% | 1 in 7.6 | 7.52x |
Exact: the chance column. Worked back from the RTP: the multipliers. No tower paytable has been captured yet, so compare these multipliers with the ones your game displays.
How tower odds add up
Every row has the same number of tiles, and you pick one. The pick is safe when it lands on a safe tile, so the chance for one row is safe tiles divided by tiles. Rows are independent, so the chance of several rows in a row is that number multiplied by itself once per row.
Worked example
With 3 tiles per row and 2 of them safe, one row is passed 66.67% of the time. Five rows in a row have a chance of 13.17%. A game returning 97.00% would then pay 0.97 ÷ 0.1317 = 7.37x for that climb.
A road crossing game is a tower with one step per lane, priced in the lane by lane odds of a chicken road game. Mines is the same idea on a shared board, and the mines calculator shows how the chance falls with each tile, while how a Mines round is decided is on the game page. For a climb where the chance changes with every card, there is the hilo calculator.
What the towers page does not claim
- The multipliers are not a published paytable. They show what the RTP implies if the game spreads its edge evenly over the rows.
- It assumes every row has the same layout. Some towers change the number of safe tiles as you climb.
- It cannot show which tile is safe. The layout of a round is fixed before your first pick and stays hidden.
Questions about tower odds
How much harder is a tower with one safe tile in three?
Five rows with two safe tiles in three succeed 13.17% of the time. With one safe tile in three it drops to 0.41%, about 1 in 243 rounds.
Is it better to cash out early?
The expected return is the same at every row if the game spreads its edge evenly. Cashing out early gives smaller wins more often. Climbing higher gives larger wins less often.
What is the chance of climbing ten rows?
With two safe tiles in three it is 1.73%. The chance falls by the same factor on every row, so long climbs get rare quickly.
Why might my game show a different multiplier?
A provider can round the numbers, cap the top prize or take more of its edge on certain rows. This page shows the multiplier that the RTP alone implies.