American Odds
A positive number (like +150) shows the profit on a $100 bet. A negative number (like -110) shows how much you must wager to win $100. American odds never sit between -100 and +100.
Tool 01
Parlay Payout Calculator
Enter your wager and the odds for each leg to calculate your potential parlay payout.
2 / 15 legs
Quick Examples
Legs · American Odds
Results
Combined American—
Combined Decimal—
Implied Probability—
Potential Profit—
Total Payout—
Enter a positive bet amount and valid American odds for each leg to see your projected payout.
Tool 02
Betting Odds Converter
Enter American, decimal, or fractional odds and instantly see the equivalent formats.
Examples
Results
American—
Decimal—
Fractional—
Implied Probability—
Profit on $100—
Total Payout on $100—
Enter valid odds in the selected format to view the conversions.
New Tool
Round Robin Calculator
Turn 3-12 selections into every smaller parlay combination. Split by amount per combo or total budget and see graded results including pushes and voids.
Learn the Basics
New to Sports Betting?
Fourteen short lessons cover straight bets, parlays, bankroll, promotions, and more — jump into whichever topic you need first.
The Basics
How It Works
Short primers on the numbers behind every bet. Skim the ones you need — the tools above handle the math for you.
Decimal Odds
A single multiplier that includes your stake. Multiply your bet by the decimal to get your total payout — for example, $10 at 2.50 returns $25.00.
Fractional Odds
Written as a ratio (like 10/11 or 3/2) showing profit relative to stake. 10/11 means you profit $10 for every $11 wagered; 3/2 means $3 profit for every $2 wagered.
Parlay Payouts
Convert each leg to decimal odds, multiply them together to get the combined decimal, then multiply by your stake for the total payout. Missing any leg voids the parlay.
Profit vs. Total Payout
Total payout is everything the sportsbook returns — your original stake plus your winnings. Potential profit is only the winnings: total payout minus the amount you wagered.
Popular Guides
Start with the Playbook
Short, plain-language explainers on the wagers, bankroll rules, and sportsbook promotions bettors ask about most.
- Read the guide
Playbook
What Is a Parlay?
How multi-leg wagers work and why every leg usually has to win.
- Read the guide
Playbook
What Is a Round Robin Bet?
Turning several picks into smaller parlays — and what the total cost really is.
- Read the guide
Playbook
Bankroll Management, Simply
How to size wagers and protect the money set aside for betting.
- Read the guide
Playbook
What Is a Straight Bet?
The one-selection wager every new bettor should understand first.
- Read the guide
Playbook
How Bonus Bets Actually Work
Why a $10 bonus bet is not always worth $10 in cash.