Which calculators are available?

Vig/Overround, No-Vig Fair Odds, Expected Value (EV), Implied Probability, Hold Percentage, Kelly Criterion, Bonus Bet, Multi-way Bonus Bet, and Arbitrage.

Are these calculators free?

Yes. All calculators are free to use in your browser.

Do they support multiple odds formats?

Yes—Decimal, American, and Fractional formats are supported.

Sports Odds Calculators

Explore OddsX’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.