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Slots: the rules, the odds and the house edge

A machine with its insides printed on the front.

Play SlotsSimulate it
What each bet costs
BetHouse edgeHow we know
One spin6.373%exact

The machine, opened

Three reels of 24 stops, every stop equally likely, so every one of the 13,824 spins can be counted. This one pays back 93.63% of what goes in over time and wins something on 24.2% of spins; most of those wins are smaller than the bet.

The paytable and how often each win comes
PaysChance on a spinAbout once every
800 to 10.007%13,824 spins
120 to 10.058%1,728 spins
45 to 10.195%512 spins
34 to 10.058%1,728 spins
18 to 10.926%108 spins
6 to 11.910%52 spins
2 to 121.007%5 spins
Reel 1
  1. seven
  2. bell
  3. star
  4. plum
  5. lemon
  6. cherry
  7. blank
  8. bell
  9. star
  10. plum
  11. lemon
  12. cherry
  13. blank
  14. star
  15. plum
  16. lemon
  17. blank
  18. plum
  19. lemon
  20. blank
  21. blank
  22. blank
  23. blank
  24. blank
Reel 2
  1. bell
  2. star
  3. plum
  4. lemon
  5. cherry
  6. blank
  7. bell
  8. star
  9. plum
  10. lemon
  11. cherry
  12. blank
  13. star
  14. plum
  15. lemon
  16. blank
  17. plum
  18. lemon
  19. blank
  20. blank
  21. blank
  22. blank
  23. blank
  24. seven
Reel 3
  1. star
  2. plum
  3. lemon
  4. cherry
  5. blank
  6. bell
  7. star
  8. plum
  9. lemon
  10. cherry
  11. blank
  12. star
  13. plum
  14. lemon
  15. blank
  16. plum
  17. lemon
  18. blank
  19. blank
  20. blank
  21. blank
  22. blank
  23. seven
  24. bell

Checked against: How slot machines work (the maths here is this machine's own).

Play chips are free and worth nothing. Real gambling costs real money; if it stops being fun, help is one call away.