Free Football Betting Calculators & Tools

Free betting calculators built for serious analysts: xG and correct score, Kelly Criterion, Expected Value, Closing Line Value, bookmaker margin and xG Difference.

• xG & Correct Score Calculator

  Free xG calculator: enter each team's expected goals to get win, draw, BTTS, over/under and correct score probabilities with fair odds (Poisson model).

• Kelly Criterion Calculator

  Free Kelly Criterion calculator for sports betting. Calculate optimal stake size based on your bankroll, decimal odds, and estimated true probability. Includes half-Kelly and quarter-Kelly options for variance reduction.

• Expected Value (EV) Calculator

  Free Expected Value (EV) calculator for sports betting. Compare your true probability against the bookmaker's implied probability to identify positive expected value bets. The single most important metric for long-term profit.

• Closing Line Value (CLV) Calculator

  Free Closing Line Value calculator. Compare the odds you took against the closing line to verify your betting edge. CLV is the single best predictor of long-term betting profit.

• Bookmaker Margin Calculator

  Free bookmaker margin calculator: enter the odds for every outcome to get the overround, margin, payout and fair no-vig odds and probabilities. 2-way, 3-way or more.

• xG Difference (xGD90) Calculator

  Free xG Difference per 90 minutes (xGD90) calculator. The cleanest single metric of team strength. Compare a team's expected goals for and against to identify who's actually good vs who's just lucky.