Arbitrage Bet Calculator
Find arbitrage betting opportunities. Calculate guaranteed profit from odds differences between sportsbooks. Free arb calculator.
Bankroll Management Calculator
Calculate optimal sports betting unit size and monthly budget. Risk of ruin analysis. Free bankroll management calculator.
Batting Average Calculator
Calculate batting average from hits and at-bats. MLB comparison included. Free batting average calculator.
Betting ROI Calculator
Calculate sports betting ROI and track profitability. Units won, win rate, and long-term P&L analysis. Free betting tracker.
Betting Units Calculator
Convert betting results to units. Track performance consistently regardless of bankroll size. Free units calculator.
Dutching Calculator
Calculate dutching stakes for multiple selections. Guaranteed equal profit on multi-outcome markets. Free dutching calculator.
Expected Value (EV) Calculator
Calculate expected value of any bet. Find +EV opportunities using probability and odds. Free EV betting calculator.
Fantasy Football Trade Calculator
Analyze fantasy football trades. Compare player values to see who wins. Free trade calculator.
Hedge Bet Calculator
Calculate hedge bet amount to guarantee profit. Lock in winnings on futures, parlays, and live bets. Free hedge calculator.
Hold Percentage Calculator
Calculate sportsbook hold percentage on any market. Compare holds across books and bet types. Free hold calculator.
Implied Probability Calculator
Calculate implied probability from American odds. Remove the vig to find true odds. Free implied probability calculator.
Kelly Criterion Calculator
Calculate optimal bet size with the Kelly Criterion. Bankroll management for sports betting and investing. Free Kelly calculator.
Moneyline Converter & Payout Calculator
Calculate moneyline payouts instantly. Enter American odds and bet amount to see profit and break-even rate.
NFL Passer Rating Calculator
Calculate NFL passer rating from QB stats. Official formula with NFL comparison. Free passer rating calculator.
Odds Converter Calculator
Convert betting odds between American, decimal, and fractional. See implied probability. Free odds converter calculator.
Over/Under (Totals) Calculator
Calculate over/under totals bet payouts. Implied probability and expected value for any total line.
Parlay Calculator
Calculate parlay payouts instantly. Enter American odds for each leg and see total payout, true probability, and implied odds.
Point Spread Calculator
Calculate point spread payouts. Break-even win rate and implied probability for any spread bet.
Prop Bet Payout Calculator
Calculate prop bet payouts for player and game props. Implied probability and EV analysis. Free prop bet calculator.
Round Robin Bet Calculator
Calculate round robin bet payouts. All parlay combinations from your selections with individual and total payouts.
Same-Game Parlay (SGP) Calculator
Calculate same-game parlay payouts. See true odds vs sportsbook odds for correlated bets. Free SGP calculator.
Teaser Bet Calculator
Calculate teaser bet payouts for NFL and NBA. Move spreads 6-7 points with multi-game combinations.
Vig / Juice Calculator
Calculate the vig (juice) on any sports bet. See the sportsbook margin and compare books. Free vig calculator.
Betting Smarter, Not Harder
The difference between recreational bettors and sharp bettors is math. Sharps don't rely on gut feelings — they calculate implied probability, compare it to their own assessment, and only bet when the odds offer value. These calculators give you the same mathematical tools professionals use: convert between odds formats, calculate parlay payouts, find hedge amounts, and manage your bankroll using the Kelly Criterion.
Understanding the House Edge
Every sportsbook builds a margin (vig/juice) into their odds. A standard -110/-110 line has a 4.5% house edge. Understanding this margin — and finding spots where it's smallest — is fundamental to long-term profitability. Our Vig Calculator shows you exactly how much the house is taking on any bet, and the Expected Value Calculator tells you whether a bet is mathematically worth making.
Frequently Asked Questions
Can you actually make money sports betting?▾
Long-term profitability requires a mathematical edge — betting where your estimated probability exceeds the implied probability by enough to overcome the vig. Most recreational bettors lose money long-term. Professional bettors target 2-5% ROI and treat it as a disciplined, math-driven process. These calculators help you understand the math, but consistent profit requires significant skill and discipline.
What is the Kelly Criterion?▾
The Kelly Criterion is a formula that determines optimal bet sizing based on your edge and the odds offered. It maximizes long-term growth while minimizing risk of ruin. Most professionals use "fractional Kelly" (25-50% of the Kelly suggestion) to reduce variance. Use our Kelly Criterion Calculator to find your optimal bet size for any wager.