Sports Odds Calculators

Explore Oddsy’s free tools for odds analysis. Convert prices, remove margin, estimate expected value, size stakes with Kelly, and more—built for sports fans in South Africa.

Quick Facts

  • All tools are free to use and support Decimal, American, and Fractional odds.
  • Outputs include probability, vig/hold, fair odds, EV, and optimal staking.
  • Optimised for en-ZA locale (SAST) with ZAR examples where relevant.

How to use

Pick a calculator, enter the odds (any format), add optional inputs like probability or bankroll, then review the results. Use internal links between tools to compare vig, fair odds, EV, and staking.

Arbitrage Opportunities

Compare prices and find market discrepancies across outcomes.

Open Arbitrage →

Calculators

Vig (Overround) Calculator

Find sportsbook margin from any market.

Open Vig →

Arbitrage Calculator

Distribute stakes to lock in profit across outcomes.

Open Arbitrage →

No-Vig Fair Odds Calculator

Remove margin to reveal true fair odds.

Open No-Vig →

Expected Value (EV) Calculator

Measure edge using your probability vs market price.

Open Expected →

Implied Probability Calculator

Convert odds to probability for each outcome.

Open Implied →

Hold Percentage Calculator

Calculate market hold and reverse hold for 2-way lines.

Open Hold →

Kelly Criterion Calculator

Optimal stake size from odds and win probability.

Open Kelly →

Bonus Bet Calculator

Hedge a free bet to convert to cash.

Open Bonus →

Multi-way Bonus Bet Calculator

Auto-optimised multi-lay stakes for equal profit.

Open Multi-way →