Free Betting Tools
Five professional-grade calculators built for bettors who treat sports betting as a craft. No sign-up required — just open and use.
When different sportsbooks price the same game differently, you can bet both sides for a guaranteed return. This calculator finds the exact stake on each side to lock in risk-free profit — supporting 2-way and 3-way markets.
Add 2 to 12 legs, mix any odds formats, and instantly see the combined odds, exact payout, and true win probability. Includes a warning when parlays become lottery tickets.
Enter a number in any format — American, decimal, fractional, or implied probability — and see it instantly converted to all others. Includes a reference table of 15 common lines.
Already have a bet running and want to hedge? Find the exact amount to bet on the other side to guarantee profit (or minimize loss). Supports free bet hedges and three strategic modes.
Input your estimated win probability and the book's offered odds. The calculator shows expected value per $100 wagered, your edge percentage, and Full / Half / Quarter Kelly bet sizes with dollar amounts.
Professional sports bettors don't wing it — they quantify every decision. These calculators make that accessible.
Before evaluating any bet, convert the odds to implied probability. If you think a team has a 55% chance of winning but the odds imply 52%, you have a 3% edge.
The Kelly Criterion tells you what percentage of your bankroll to bet based on your edge. Betting too much relative to edge destroys bankrolls — Kelly keeps you in the game long-term.
When the combined implied probability from two books drops below 100%, an arbitrage exists. Use the arb calculator to find exact stakes and lock in profit with no risk.
If a parlay leg or futures bet is close to winning, hedging guarantees you collect something. The hedge calculator shows exactly how much to bet on the other side.
Calculators are only as powerful as your understanding of the underlying strategy.
How arbs form, how to find them, which books to use, and how to manage your accounts for longevity.
Why CLV predicts long-term profitability better than your win/loss record, and how to track it.
Line movement tracking, CLV measurement, arbitrage detection, and odds comparison — all in one platform.