Key takeaways
- Average cost = stakes × house edge.
- Try 96% against 94%.
- A long-run average.
- One session can differ widely.
The calculator
Stakes are capped at £5 because that is the UK online limit. One session can end far above or below the average.
An hour at the speed limit
| Stake | Spins at 2.5 seconds | Staked | Average cost at 96% |
|---|---|---|---|
| 10p | 1,440 | £144 | £5.76 |
| 20p | 1,440 | £288 | £11.52 |
| £1 | 1,440 | £1,440 | £57.60 |
Few people spin that fast; the table shows the ceiling.
Keep reading: Jackpots, UK slot machine categories, Fishin' Frenzy slot machine and How to play a slot machine.
Go further: Cluster pays slot machines, Free spins features and Sweet Bonanza vs Big Bass Bonanza.
Keep reading: Fluffy Favourites vs Fishin' Frenzy, The first video slot machines, From mechanical to online and Slot machine glossary.
Slot figures are developers' published defaults, each confirmed against two sources; the version at your casino can differ. UK land-based stake and prize limits and online rule dates were checked against Gambling Commission and licensing authority sources on 6 October 2026. History follows commonly cited accounts. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
Frequently asked questions
What does a slot session cost?
Stakes times the house edge, on average.
What is the house edge?
100% minus RTP.
Is it a prediction?
No.
Why is the stake capped?
The UK limit is £5.