Bet Calculator: Odds & Parlay

See what the odds mean before you decide.

BetCalc turns American, decimal and fractional odds into clear numbers: potential profit, total payout and implied probability. Build a parlay, compare a hedge or return to a saved calculation — all in a private toolkit with no account required.

FREE TOOLS
• Convert American, decimal and fractional odds.
• Calculate single-bet profit and total payout, including your stake.
• Build parlays with up to 15 legs and see combined odds and implied probability.
• Calculate Full Kelly bet size from your own probability estimate.
• View your latest five saved calculations.
• Keep unfinished inputs when switching screens or reopening the app.
• Choose a default stake and USD, EUR, GBP, CAD or AUD.

BETCALC PRO — ONE-TIME PURCHASE
• Expected value and fair odds based on your own probability estimate.
• Half and Quarter Kelly sizing.
• Hedge calculations that show the net result in both outcomes.
• Parlay analysis: compare combined odds with each leg removed.
• Access your full saved history, mark favorites, repeat calculations and share result cards.

See worked examples in the app before purchasing. Pro is a lifetime unlock with no subscription. Price is shown in your local App Store currency.

BUILT FOR REPEAT USE
Switching odds formats preserves the original calculation precision. Saved calculations record their currency, and Pro lets you reopen them with their inputs. Older history stays on your device even when only the free history view is available.

PRIVATE BY DESIGN
Calculations and history stay on your device. No account or ads. Calculations work offline; purchasing or restoring Pro requires the App Store.

UNDERSTAND THE ASSUMPTIONS
Implied probability comes from the odds; it is not a prediction. Parlay calculations assume independent legs. EV and Kelly depend on the probability you enter. Hedge calculations assume two mutually exclusive outcomes covering every possibility; draws, voids and fees are not included. A hedge can still leave a loss.

BetCalc is an informational calculator. It does not accept bets, handle money, predict results or provide betting advice.