Free Betting Calculators

Expected value is the average amount you win or lose per bet over time. A +EV bet has a positive expected return, meaning the true probability of winning is higher than what the odds imply. Our EV calculator helps you find these edges by comparing your estimated probability to the sportsbook odds.

Closing line value measures whether you got better odds than the final line before a game starts. Consistently beating the closing line is the strongest predictor of long-term profitability in sports betting. Our CLV tracker helps you measure this across your bets.

The Kelly criterion calculates the optimal percentage of your bankroll to wager based on your edge and the odds offered. It maximizes long-term growth while managing risk. Most sharp bettors use fractional Kelly (25-50%) to reduce variance.

Hold (or vig/juice) is the sportsbook's built-in margin on a market. For example, if both sides of a spread are -110, the hold is about 4.5%. Our hold calculator strips out the vig to show you the true fair odds, helping you identify which books offer the best value.