Tool
Roulette Expected Cost Calculator
Compare theoretical expected loss across common roulette wheel/rule configurations.
Quick answer
Expected cost equals total wagering action multiplied by the applicable house edge. This is a long-run expectation, not a prediction of what one session will lose.
Estimate roulette expected cost
Choose a wheel and enter action.
Configurations included
European single-zero standard bets: 2.7027%; American double-zero standard bets: 5.2632%; French single-zero eligible even-money with La Partage: 1.3514%.
Action matters
A $10 bet repeated 200 times is $2,000 of total action even if the starting bankroll was much smaller.
Volatility is separate
Two bets can have the same expected cost and very different short-term swings.
Related reading
Responsible gambling: Gambling involves financial risk. Never chase losses or gamble with money needed for essentials. Eligibility and legal age vary by jurisdiction.