Roulette is simple probability wrapped in a crowded betting layout.

The cleanest way to understand it is to count pockets, count winning outcomes and compare the payout with fair odds.

Reviewed by the Baccaret Editorial Team · Updated August 2026

Key difference

A standard single-zero wheel has 37 pockets and a 2.70% edge on ordinary bets. A double-zero wheel has 38 pockets and a 5.26% edge on ordinary bets.

Inside bets, outside bets and wheel resolution.

Why adding 00 changes every standard payout.

Enter pockets covered and payout to see probability, fair payout and house edge.

Hot numbers, streaks and the gambler’s fallacy.

Wheel & surrender-rule intelligence

How zero treatment can halve the edge on even-money bets.

Verify pockets, payouts and special zero treatment.

Translate wheel rules into expected loss.