Glossary · variant
European roulette
Single-zero wheel, 37 pockets, house edge 2.70%. The canonical model on this site.
In context
Every figure on this site assumes it unless a page says otherwise.
Did you know
The single zerowheelZeroThe single green pocket that no even-money, dozen or column bet covers; the source of the house edge. Also: single zero, 0.Read full → was introduced in 1843 at Bad Homburg by the Blanc brothers as a competitive price cut, not as a kindness; it worked, and Monte Carlo made it standard.