Bet Calculator

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Sports Bet Calculator

Decimal (e.g. 2.50) Fractional (e.g. 3/2) American (e.g. +150)
Enter fractional odds as '5/2' or '2/1'.
Potential Profit: 0.00
Total Return: 0.00

How to Use the Bet Calculator

This bet calculator helps you determine exactly how much you stand to win based on your stake and the odds provided by a bookmaker. Understanding the math behind sports betting is crucial for managing your bankroll effectively.

Understanding Odds Formats

  • Decimal Odds: Most common in Europe and Australia. They represent the total return for every 1 unit staked. (Formula: Stake × Odds)
  • Fractional Odds: Popular in the UK. They show the profit relative to the stake. '5/1' means you win 5 units for every 1 unit bet.
  • American Odds: Positive numbers (+) show profit on a 100-unit stake. Negative numbers (-) show how much you must bet to win 100 units.

Calculation Examples

Example 1: Decimal Odds
If you bet 100 on odds of 2.50, your total return is 250 (100 × 2.50), resulting in a 150 profit.

Example 2: American Odds (Underdog)
A 50 bet on +200 odds means you win 100 profit (50 × (200/100)), for a total return of 150.

Example 3: American Odds (Favorite)
A 100 bet on -200 odds means you win 50 profit (100 × (100/200)), for a total return of 150.

function updateOddsPlaceholder() { var format = document.getElementById('oddsFormat').value; var input = document.getElementById('oddsValue'); if (format === 'decimal') input.placeholder = 'e.g. 2.50'; else if (format === 'fractional') input.placeholder = 'e.g. 5/2'; else if (format === 'american') input.placeholder = 'e.g. +150 or -110'; } function calculateBetReturn() { var stake = parseFloat(document.getElementById('betStake').value); var format = document.getElementById('oddsFormat').value; var oddsRaw = document.getElementById('oddsValue').value.trim(); var decimalOdds = 0; if (isNaN(stake) || stake 0) { decimalOdds = (val / 100) + 1; } else { decimalOdds = (100 / Math.abs(val)) + 1; } } if (isNaN(decimalOdds) || decimalOdds <= 1) { alert("Please enter valid odds."); return; } var totalReturn = stake * decimalOdds; var totalProfit = totalReturn – stake; document.getElementById('profitDisplay').innerText = totalProfit.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('returnDisplay').innerText = totalReturn.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('betResult').style.display = 'block'; } catch (e) { alert("There was an error in calculation. Please check your odds format."); } }

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