Tools · Free · Nothing stored

Run the numbers before you play

Four working tools built on the actual mathematics of slot machines. Everything runs in your browser — no account, no data sent anywhere, no paid tier.

Variance simulator

Plays out 1,000 independent sessions using a payout distribution calibrated to the RTP and volatility you pick, then plots where they finished. This is what "96.5% RTP" actually looks like from the player's chair — and why no signal can change it.

Lost it all
Finished ahead
Median result
Average result
Lost everythingWhere 1,000 sessions finishedHit the walk-away
Below budget Above budget Break even
WHY THIS MATTERS
Run the simulation to see the spread. The average and the typical result are not the same number — that gap is the whole reason slots feel winnable.

Bonus wagering cost

A deposit bonus is a loan of turnover, not free money. Enter the offer and this calculates the total you must wager, what clearing it costs on average, and how often the bankroll dies before the requirement is met.

Must wager
Expected cost
Expected net
Bust before clearing
Spins required
Hours at 600 spins/hr
READ THIS
The headline percentage is the least important number in a bonus offer. The wagering requirement and what it applies to decide whether the offer is worth anything at all.

Game compare

Put three titles side by side and see what the RTP difference actually costs over a real number of spins. Where a game ships in multiple RTP builds, the lowest configuration is shown as the worst case — because that is the one you may be playing.

Expected cost over the selected spins
NOTE
Expected cost assumes the published RTP. It says nothing about which game pays tonight — volatility decides how violently your actual result swings around this line, and a high-volatility game will spend most sessions well below it.

Game database

Search and sort by any column. RTP is listed as the range a title ships in — operators choose which build to deploy, so the number on your screen may not be the headline one.

GameRTP range VolatilityMax winFormat