Casino Math Calculators

Kelly Criterion Calculator

Calculate the Kelly-optimal bet size for your bankroll, edge, and game variance. Full and fractional Kelly, with the math explained.

Risk of Ruin Calculator

Calculate your bankroll's risk of ruin from edge, variance, and bet size. With the formula, examples, and practical bankroll guidance.

Blackjack House Edge Calculator

Calculate the exact blackjack house edge for any combination of decks, H17/S17, DAS, surrender, 6:5 vs 3:2, dealer peek, and resplit aces.

Match-Play Coupon EV Calculator

Calculate the expected value of any match-play coupon. Even-money, blackjack, roulette, sports — find out what each coupon is actually worth.

Casino Comp-Rate Calculator

Calculate your theoretical loss and the comp value you should earn back. Real numbers for blackjack, video poker, slots, and table games.

Blackjack Side-Bet EV Calculator

House edge for the most common blackjack side bets — 21+3, Lucky Ladies, Perfect Pairs, Insurance, Match the Dealer. Skip the bad ones.

Session Variance Calculator

Expected loss, standard deviation, and 5/50/95 percentile session outcomes for any casino game. Plan your bankroll around real variance.

N0 / SCORE Calculator

Calculate N0 — the number of rounds for one standard deviation to equal expected win. Compare counting systems by risk-adjusted return.

Hourly EV Calculator

Calculate dollars per hour for any casino game given bet size, edge, and pace. Negative for house games, positive for advantage play.

Bankroll Sizing Calculator

Calculate the minimum bankroll required for your edge, variance, and risk-of-ruin target. Pro-level (1% RoR) and trip-level (5%) presets.