MTBF from Failure Rate Calculator
Mean Time Between Failures (MTBF) is a key reliability metric used to assess the expected operational time of a repairable system between its successive failures. It's particularly important in industries where system downtime can lead to significant financial losses or safety hazards. A higher MTBF indicates a more reliable system. Calculating MTBF from the failure rate provides a direct measure of this reliability.
Calculate MTBF
function calculateMTBF() {
var failureRateInput = document.getElementById("failureRate");
var timeUnitSelect = document.getElementById("timeUnit");
var resultDiv = document.getElementById("result");
var failureRate = parseFloat(failureRateInput.value);
var timeUnit = timeUnitSelect.value;
if (isNaN(failureRate) || failureRate <= 0) {
resultDiv.innerHTML = "Please enter a valid positive failure rate.";
return;
}
// MTBF = 1 / Failure Rate
var mtbf = 1 / failureRate;
resultDiv.innerHTML = "
Calculated MTBF: " + mtbf.toLocaleString() + " " + timeUnit + "";
}
.calculator-container {
font-family: sans-serif;
max-width: 500px;
margin: 20px auto;
padding: 20px;
border: 1px solid #ccc;
border-radius: 8px;
background-color: #f9f9f9;
}
.calculator-container h2 {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.calculator-inputs {
margin-bottom: 20px;
}
.input-group {
margin-bottom: 15px;
}
.input-group label {
display: block;
margin-bottom: 5px;
font-weight: bold;
color: #555;
}
.input-group input[type="number"],
.input-group select {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
}
.calculator-container button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
margin-bottom: 20px;
}
.calculator-container button:hover {
background-color: #45a049;
}
.calculator-result {
margin-top: 20px;
padding: 15px;
border: 1px solid #e0e0e0;
border-radius: 4px;
background-color: #fff;
text-align: center;
font-size: 18px;
}
.calculator-result p {
margin: 0;
color: #333;
}
.calculator-result .error {
color: red;
font-weight: bold;
}