Probability Spinner Simulator
Set your game, add prizes, preview the distribution — then spin!
1) Cost & Balance
2) Prizes & %
3) Ready to Spin
Go to Spinner
🎛️
Game settings
Cost per spin:
Starting balance:
Must be positive numbers.
🎁
Prizes
% does not total 100
Balanced
Frequent small wins
High volatility
Prize
Percentage chance
Row
Percentages should total 100%.
+ Add prize
Clear prizes
0 rows
% does not total 100
👀
Preview
Mini prize wheel
Payout distribution
Previews update live. Key stats remain locked until you enter the password below.
Reveal key information
Submit
Reset
Password:
Unlock
% does not total 100
Average prize:
Average RTP:
Back to Menu
Spin
Run 500 Trials
Stop
Payout distribution
Balance gauge
100%
Balance:
Graph shows balance after each spin. Zero line is shown if within range. Colored ticks every 10 spins: green (win ≥ cost), red (loss).