Sports Betting Calculator

Seven betting calculators in one app. Compare odds, explore expected value, size stakes, and calculate parlays and hedges. Works offline—no account needed.

Understand the odds. Explore the numbers. Keep the math close.

Sports Betting Calculator by OddsRX brings seven practical calculators together in a simple iPhone app. Convert odds, compare probabilities, explore expected value, and calculate stakes, parlays, and hedges—with clear results and explanations.

SEVEN TOOLS, ONE APP

• Implied Odds Convert American, decimal, and fractional odds into implied probabilities and compare prices across formats.

• No-Vig Odds Remove the margin from a two-outcome market to estimate fair probabilities and odds.

• Break-Even Price Enter your estimated win probability to find the price that breaks even.

• Expected Value Compare your probability estimate with the offered odds to calculate expected profit, expected ROI, and the break-even win rate.

• Kelly Stake Sizing Explore how estimated edge, fractional Kelly settings, and an optional bankroll cap affect calculated stake size.

• Parlay Payout Combine 2–12 legs to calculate potential return, profit, combined odds, and implied probability. Results assume independent selections.

• Hedge a Position Calculate the opposite-side stake that aims to balance the net outcomes of a two-outcome position.

BUILT FOR YOUR IPHONE

• Immediate results as you enter values • Examples, formulas, and explanations • Favorites for quick access to your most-used tools • Saved calculations with their original inputs and results • Shareable results and explanations • Light and dark appearance • Offline calculations with no account required

YOUR CALCULATIONS STAY LOCAL

Inputs, favorites, and saved results are stored on your device. The app has no advertising or analytics tracking. Sharing is your choice; opening website links requires an internet connection.

UNDERSTAND THE ASSUMPTIONS

These calculators explain the mathematics behind the values you enter. They do not predict winners, verify that an edge exists, or guarantee a profit. Probability estimates, rounding, fees, settlement rules, and correlated selections can affect actual results.

For informational, educational, and research purposes only—not betting, financial, or investment advice. OddsRX does not accept or place wagers or hold funds. Intended for adults of legal gambling age in their location. Follow local laws and gamble responsibly.

Learn more at OddsRX.com.