Dice simulator: win chance, targets and multipliers
This free Dice simulator lets you practise the casino-style number game with virtual credits. Set a win chance and choose whether the roll must be below or above the displayed target. Each roll produces a number from 0.00 to 99.99. It is an independent AskSpinner practice model, with no connection to a casino account.
Choose a chance and roll direction
Choose a win chance from 2.00% to 98.00%, then select Roll under or Roll over. The winning range and multiplier update together. Enter a virtual stake from 0.01 to 1,000 credits that your balance can cover. A lower win chance gives a higher potential multiplier, but fewer rolls qualify as wins.
How roll-under and roll-over targets work
The model has 10,000 equally likely outcomes: 0.00, 0.01 and so on through 99.99. At a 49.50% win chance, Roll under wins below 49.50, covering 0.00 to 49.49. Roll over wins above 50.49, covering 50.50 to 99.99. Both ranges contain 4,950 outcomes.
A roll exactly equal to the displayed target loses: the comparisons are strictly below or strictly above. Switching direction at the same win chance changes the winning numbers, not the probability or payout.
Calculate the Dice payout multiplier
Before rounding, the total-return multiplier is 0.99 divided by the win probability. A 49.50% chance gives 0.99/0.495 = 2.00×. A winning 25-credit roll therefore returns 50 credits, including the stake, for a net gain of 25. A loss returns zero and costs the 25-credit stake.
At a 10% chance the multiplier is 9.90×, but only one tenth of the possible outcomes win. The return amount is rounded down to 0.01 credit. The displayed theoretical RTP includes that rounding at your selected stake, so it may be slightly below 99%.
Single rolls and fixed batches
Roll once or run a batch of 10, 50 or 100 rolls at the same stake and settings. Stop ends the batch after the current roll. A batch also stops if the remaining balance cannot cover the next stake. Settings stay locked while it runs so the results belong to the configuration you selected.
History shows the latest 50 rolls, while the session totals include all completed rolls. Reset starts again with 1,000 virtual credits and clears the record. The session limit is 10,000 rolls; reset to begin a new session.
Theoretical RTP and your session result
The 99% target describes the average return of this mathematical model before cent rounding. It does not mean a 99% chance of winning a roll or a promise to finish a session with 99% of the credits you staked. Actual results vary, especially in short sessions or at low win chances.
Each roll is independent. A run of losses does not make a win due, and increasing the stake does not change the selected win chance. Read the wins, losses, amount staked and amount returned together; a high win count alone does not establish a profitable session.
What this simulator can and cannot show
Use the simulator to explore a stated probability model and the effect of changing stakes or win chances. It does not copy a provider’s official game, test a casino’s random-number generator or predict the next result elsewhere. Its virtual credits cannot be purchased, withdrawn or exchanged for money.
Casino-style dice, and this tool’s practice model
This is not a physical dice roller. It is a casino-style under/over tool with a chosen win chance and a multiplier from this simulator’s practice model, including the 0.99 / p relationship already documented on the page. That relationship is not a published RTP for a commercial dice title, and this page cannot verify a provably fair operator roll. For the same practice-model limit on a crash-style game, see the Aviator / Crash Simulator.
This is a free practice tool that uses virtual credits. It is not a way to make money, and it does not change the odds of any real-money game. If you gamble with real money, set a limit and use your local self-exclusion or support services if play stops being fun.