Win Rate & Win/Loss Ratio Calculator
Whether you are analyzing trading performance, video game statistics, or sports betting results, understanding your success metrics is crucial. This calculator helps you determine two vital key performance indicators (KPIs): your Win Rate percentage and your Win/Loss Ratio. While often confused, these metrics tell different stories about your performance.
What is Win Rate vs. Win/Loss Ratio?
- Win Rate (%): This measures the percentage of total events that resulted in a win. It is calculated as: (Wins / Total Events) * 100. A 50% win rate means you win exactly half the time.
- Win/Loss Ratio: This measures the relationship between your winning events versus your losing events, independent of the total count. It is calculated as: Wins / Losses. A ratio of 2:1 means you have two wins for every single loss.
Interpreting Your Results
In many fields, like financial trading, a high win rate doesn't guarantee profitability if your average loss is much larger than your average win. Conversely, a lower win rate (e.g., 40%) can still be highly profitable if your winning trades are significantly larger than your losing trades. Use both the Win Rate percentage and the Win/Loss ratio together to get a complete picture of your historical performance consistency.
function calculateWinStats() {
// Get input values
var winsStr = document.getElementById("inputWins").value;
var lossesStr = document.getElementById("inputLosses").value;
var resultDiv = document.getElementById("winCalcResult");
// Parse inputs to numbers
var wins = parseFloat(winsStr);
var losses = parseFloat(lossesStr);
// Validation: Check for valid non-negative numbers
if (isNaN(wins) || isNaN(losses) || wins < 0 || losses 0
if (totalEvents === 0) {
resultDiv.style.display = "block";
resultDiv.style.borderLeftColor = "#dc3232";
resultDiv.style.backgroundColor = "#fceeee";
resultDiv.innerHTML = "Total events cannot be zero. Please enter at least one win or loss.";
return;
}
// Calculate Win Rate Percentage
var winRatePercent = (wins / totalEvents) * 100;
// Calculate Win/Loss Ratio considering edge case of 0 losses
var ratioDisplay;
if (losses === 0) {
if (wins > 0) {
ratioDisplay = "Infinite (Perfect Record)";
} else {
// Should be covered by totalEvents check, but as a fallback
ratioDisplay = "N/A";
}
} else {
var ratioValue = wins / losses;
ratioDisplay = ratioValue.toFixed(2) + " : 1″;
}
// Reset styles for success output
resultDiv.style.display = "block";
resultDiv.style.borderLeftColor = "#0073aa";
resultDiv.style.backgroundColor = "#eef7fc";
// Build output HTML
var outputHtml = "
Performance Summary
";
outputHtml += "
Total Events: " + totalEvents + "";
outputHtml += "
Win Rate: " + winRatePercent.toFixed(2) + "%";
outputHtml += "
Win/Loss Ratio: " + ratioDisplay + "";
// Add contextual interpretation based on results
if (winRatePercent > 50) {
outputHtml += "
You are winning more often than you are losing.";
} else if (winRatePercent < 50) {
outputHtml += "
You are losing more often than you are winning.";
} else {
outputHtml += "
Your performance is exactly split between wins and losses.";
}
resultDiv.innerHTML = outputHtml;
}