Betting Calculators
Professional sports betting tools to help you make smarter bets. All calculators are free and work with decimal, fractional, and American odds.
Basic
Essential betting calculators for beginners
Bet Conversion Calculator
Convert between different betting odds formats: decimal, fractional, and American odds. Free odds conversion tool for sports betting.
Implied Probability Calculator
Convert betting odds to implied probability percentages. Calculate the probability of outcomes from decimal, fractional, and American odds formats.
Advanced
Professional tools for experienced bettors
Arbitrage Calculator
Find and calculate arbitrage opportunities between two bookmakers. Enter the odds and total stake to see if a profitable arbitrage exists.
Free Play Value Calculator
Calculate the risk-free real dollar profit that can be obtained from betting and hedging a free play bonus of any size.
Kelly Criterion Calculator
Calculate optimal bet size using the Kelly Criterion formula. Determine the mathematically optimal stake for sports betting based on your edge and bankroll management.
Value Betting Calculator
Calculate expected value (EV) to identify profitable betting opportunities.
Multi-bet
Calculators for combination bets
Risk Management
Tools to protect and manage your bankroll
Analysis
Statistical analysis and probability tools
General
General purpose betting calculators
Asian Handicap Calculator
Calculate Asian handicap betting outcomes including quarter and half handicaps.
Dutching Calculator
Calculate optimal stakes for dutching across multiple outcomes.
Half
Calculate the value of buying or selling half-points for spreads and totals in various sports
No
Remove bookmaker margin to find true probabilities and fair odds
Over/Under Calculator
Calculate over/under betting outcomes and analyze totals markets.
Reverse Bet Calculator
Calculate reverse bet outcomes including maximum win/loss and all possible scenarios
Spread/Moneyline Calculator
Convert between point spreads and moneylines for football, basketball, and other sports
Streak Calculator
Calculate the probability of achieving a winning streak in a series of bets
Need Help Finding the Right Calculator?
Not sure which calculator to use? Here are some quick recommendations:
Start with Bet Conversion and Implied Probability calculators
Use the Arbitrage and Hedge calculators
Try Parlay and Round Robin calculators