Bets Calculator

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Betting Odds & Payout Calculator

Decimal (e.g. 2.50) Fractional (e.g. 3/2) American (e.g. +150)
Total Payout: 0.00
Net Profit: 0.00
Implied Probability: 0%
function calculateBet() { var stake = parseFloat(document.getElementById('stake').value); var format = document.getElementById('oddsFormat').value; var oddsRaw = document.getElementById('oddsValue').value.trim(); var resultArea = document.getElementById('result-area'); if (isNaN(stake) || stake <= 0 || oddsRaw === "") { alert("Please enter a valid stake and odds value."); return; } var decimalOdds = 0; var impliedProb = 0; try { if (format === 'decimal') { decimalOdds = parseFloat(oddsRaw); if (decimalOdds = 100) { decimalOdds = (amOdds / 100) + 1; } else if (amOdds <= -100) { decimalOdds = (100 / Math.abs(amOdds)) + 1; } else { throw "Invalid"; } } if (isNaN(decimalOdds)) throw "Invalid"; var payout = stake * decimalOdds; var profit = payout – stake; impliedProb = (1 / decimalOdds) * 100; document.getElementById('totalPayout').innerText = payout.toFixed(2); document.getElementById('netProfit').innerText = profit.toFixed(2); document.getElementById('probValue').innerText = impliedProb.toFixed(2); resultArea.style.display = 'block'; } catch (e) { alert("Invalid odds format for the selected type."); } }

Understanding Betting Odds

A bets calculator is an essential tool for sports bettors to quickly determine the potential return on any wager. By inputting your stake and the odds provided by a bookmaker, you can see exactly how much you stand to win and the total amount that will be returned to your account if the bet is successful.

Common Odds Formats

  • Decimal Odds: Most common in Europe and Australia. It represents the total return (stake + profit) for every 1 unit wagered. Example: At 2.50 odds, a 10 stake returns 25.
  • Fractional Odds: Popular in the UK. The first number is the potential profit, and the second is the stake required. Example: 5/1 means you win 5 for every 1 staked.
  • American Odds: Used in the US. Positive numbers (+) show how much profit you make on a 100 stake. Negative numbers (-) show how much you must stake to make 100 profit.

How to Calculate Manually

If you aren't using our betting calculator, here are the core formulas:

Profit (Decimal) = Stake * (Odds – 1)
Profit (Fractional) = Stake * (Numerator / Denominator)
Profit (American Positive) = Stake * (Odds / 100)

What is Implied Probability?

The implied probability is the likelihood of an outcome occurring as suggested by the bookmaker's odds. If the implied probability is lower than your own estimation of the outcome's chance, it is considered a "value bet." Calculating implied probability helps bettors identify long-term profitable opportunities.

Expert Tip: Always compare odds across multiple sportsbooks. Even a small difference in decimal odds (e.g., 1.90 vs 1.95) can significantly impact your long-term profitability when compounded over hundreds of bets.

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