From a Parlay Builder that calculates your combined odds in seconds, to an EV Calculator that identifies +EV opportunities, to a Cashback Calculator that maximizes every promo — we've built the tools serious bettors actually need.
New to sports betting? Each calculator includes clear labels and instant results. No formulas required — just enter your numbers and bet smarter.
Our Calculators
01
Parlay Builder
Add multiple legs in American, decimal, or fractional odds. Instantly see your combined parlay odds, total payout, and net profit before placing the bet.
02
Expected Value (EV) Calculator
Identify +EV or -EV bets in seconds. Enter your estimated true probability and the sportsbook odds to reveal the long-term profitability of any wager.
03
Cashback Calculator
Maximize the value of every cashback and refund promo. Enter the offer details to instantly calculate your guaranteed return and real net profit.
Why Get 1 Over on the Sportsbook When You Can Get 1,000s?
Use these calculators to find the edge, place the smart bet, and build your bankroll — one winning play at a time.
Convert each leg to decimal odds, multiply them all together, then multiply by your stake. Subtract your stake for net profit. Our Parlay Builder automates this for multiple legs in any odds format.
Expected value is the average profit or loss per bet if you placed it thousands of times. A positive EV (+EV) means the bet is profitable long-term. Enter your true probability estimate and the sportsbook's odds to calculate it instantly.
The sportsbook edge (vig or juice) is calculated by converting both sides of a market into implied probabilities. When those probabilities add up to more than 100%, the excess is the book's margin. Our EV Calculator factors this in automatically.
Cashback promos refund a percentage of your net losses (or a flat amount) over a set period. Our Cashback Calculator lets you enter the promo terms to see exactly how much you get back and your true net position after the rebate.
For American odds: positive odds (e.g. +200) pay (stake × odds/100) + stake. Negative odds (e.g. -150) pay (stake ÷ (odds/100)) + stake. Our Parlay Builder handles single-leg payouts as well as multi-leg combinations.
Positive American odds (e.g. +150) mean you profit $150 for every $100 wagered. Negative odds (e.g. -150) mean you must wager $150 to profit $100. All three calculators on this page accept American odds as input.
ROI = (Total Profit ÷ Total Amount Wagered) × 100. A positive ROI means you're profitable. Tracking ROI alongside EV is the best way to determine whether your results are skill-based or variance-driven.