What's included
- Arbitrage Calculator. Calculate exact stake amounts for risk-free arbitrage betting across 2 or more bookmakers — guaranteed profit regardless of outcome.
- Expected Value Calculator. Determine if a bet has positive expected value by comparing bookmaker odds to your true probability estimate.
- Kelly Criterion Calculator. Optimize bet sizing using the Kelly formula to maximize long-term bankroll growth while managing risk.
- Odds Converter. Instantly convert between American, Decimal, and Fractional odds formats, with implied probability for each.
- Parlay Calculator. Calculate potential payouts for multi-leg parlays and accumulators.
- Implied Probability. Convert betting odds to implied probability percentages and compare against your own estimates.
- No-Vig Calculator. Remove bookmaker margin (vig) from odds to find true fair odds and spot mispriced markets.
- Bonus Bet Converter. Convert free bets and bonus bets to cash using optimal hedging strategies.
- Hold Calculator. Calculate the bookmaker hold percentage on any market — lower hold means better value.
- Hedge Calculator. Calculate optimal hedge bet sizes to guarantee profit or minimize loss on existing positions.
More calculators are on the way, including Point Spread, Round Robin, Poisson, and Dutching calculators.
How to use the calculators
- Choose your calculator. Select from 14+ specialized calculators based on what you need to calculate.
- Enter your data. Input odds, stakes, probabilities, or bankroll amounts.
- Get instant results. Receive immediate calculations with clear profit expectations.
- Apply to your bets. Use results to place informed bets with optimal sizing.