Prorate Calculator
This calculator helps you determine a prorated amount for a specific period or item. Proration is the process of dividing an amount or cost proportionally. This is commonly used for expenses like rent, insurance premiums, subscriptions, or salaries when a service or agreement begins or ends mid-period.
Total Amount:
Total Period (in days):
Prorated Period (in days):
Calculate Prorated Amount
function calculateProrata() {
var totalAmount = parseFloat(document.getElementById("totalAmount").value);
var totalPeriod = parseFloat(document.getElementById("totalPeriod").value);
var proratedPeriod = parseFloat(document.getElementById("proratedPeriod").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(totalAmount) || isNaN(totalPeriod) || isNaN(proratedPeriod)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (totalPeriod <= 0) {
resultDiv.innerHTML = "Total Period must be greater than zero.";
return;
}
if (proratedPeriod < 0) {
resultDiv.innerHTML = "Prorated Period cannot be negative.";
return;
}
// Calculate the daily rate
var dailyRate = totalAmount / totalPeriod;
// Calculate the prorated amount
var proratedAmount = dailyRate * proratedPeriod;
resultDiv.innerHTML = "Daily Rate: " + dailyRate.toFixed(2) + "" +
"Prorated Amount: " + proratedAmount.toFixed(2) + "";
}
.calculator-container {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 400px;
margin: 20px auto;
box-shadow: 2px 2px 5px rgba(0,0,0,0.1);
}
.calculator-container h2 {
text-align: center;
margin-bottom: 20px;
color: #333;
}
.input-section {
margin-bottom: 20px;
display: grid;
grid-template-columns: 1fr 2fr;
gap: 10px;
align-items: center;
}
.input-section label {
font-weight: bold;
color: #555;
}
.input-section input[type="number"] {
width: calc(100% – 12px);
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
}
.calculator-container button {
display: block;
width: 100%;
padding: 10px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.3s ease;
}
.calculator-container button:hover {
background-color: #0056b3;
}
#result {
margin-top: 20px;
padding: 10px;
border-top: 1px solid #eee;
text-align: center;
font-size: 1.1em;
color: #333;
}
#result p {
margin: 5px 0;
}