Weighted Average Payment Terms Calculator & Guide
:root {
–primary-color: #004a99;
–success-color: #28a745;
–background-color: #f8f9fa;
–text-color: #333;
–border-color: #ccc;
–input-border-color: #ddd;
–shadow-color: rgba(0, 0, 0, 0.1);
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: var(–text-color);
background-color: var(–background-color);
margin: 0;
padding: 0;
display: flex;
flex-direction: column;
align-items: center;
padding-top: 20px;
padding-bottom: 20px;
}
.main-container {
width: 100%;
max-width: 1000px;
background-color: #fff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 12px var(–shadow-color);
margin: 0 auto;
display: flex;
flex-direction: column;
align-items: center;
}
header {
text-align: center;
margin-bottom: 30px;
width: 100%;
}
h1 {
color: var(–primary-color);
font-size: 2.5em;
margin-bottom: 10px;
}
h2, h3 {
color: var(–primary-color);
margin-top: 25px;
margin-bottom: 15px;
}
h2 {
font-size: 1.8em;
border-bottom: 2px solid var(–primary-color);
padding-bottom: 5px;
}
h3 {
font-size: 1.4em;
}
.summary {
font-size: 1.1em;
color: #555;
margin-bottom: 30px;
text-align: left;
}
.loan-calc-container {
background-color: #f0f0f0;
padding: 25px;
border-radius: 8px;
border: 1px solid var(–border-color);
width: 100%;
margin-bottom: 30px;
box-sizing: border-box;
}
.loan-calc-container h3 {
margin-top: 0;
color: var(–primary-color);
text-align: center;
border-bottom: none;
}
.input-group {
margin-bottom: 20px;
text-align: left;
width: 100%;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: var(–primary-color);
}
.input-group input[type="number"],
.input-group input[type="text"],
.input-group select {
width: calc(100% – 22px);
padding: 10px 10px 10px 10px;
border: 1px solid var(–input-border-color);
border-radius: 4px;
font-size: 1em;
box-sizing: border-box;
}
.input-group input[type="number"]:focus,
.input-group input[type="text"]:focus,
.input-group select:focus {
outline: none;
border-color: var(–primary-color);
box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2);
}
.input-group .helper-text {
font-size: 0.85em;
color: #666;
margin-top: 5px;
display: block;
}
.error-message {
color: #dc3545;
font-size: 0.85em;
margin-top: 5px;
height: 1.2em; /* Reserve space */
}
.button-group {
display: flex;
justify-content: space-between;
margin-top: 25px;
}
.button-group button, .button-group input[type="button"] {
padding: 12px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 1em;
font-weight: bold;
transition: background-color 0.3s ease, transform 0.2s ease;
flex: 1;
margin: 0 5px;
}
.button-group button:first-child, .button-group input[type="button"]:first-child {
margin-left: 0;
}
.button-group button:last-child, .button-group input[type="button"]:last-child {
margin-right: 0;
}
.btn-calculate {
background-color: var(–primary-color);
color: white;
}
.btn-calculate:hover {
background-color: #003366;
transform: translateY(-1px);
}
.btn-reset {
background-color: #ffc107;
color: #212529;
}
.btn-reset:hover {
background-color: #e0a800;
transform: translateY(-1px);
}
.btn-copy {
background-color: var(–success-color);
color: white;
}
.btn-copy:hover {
background-color: #218838;
transform: translateY(-1px);
}
.results-container {
margin-top: 30px;
padding: 25px;
background-color: var(–primary-color);
color: white;
border-radius: 8px;
width: 100%;
box-sizing: border-box;
text-align: center;
}
.results-container h3 {
color: white;
margin-bottom: 15px;
font-size: 1.6em;
}
.primary-result {
font-size: 2.5em;
font-weight: bold;
margin: 15px 0;
color: var(–success-color); /* Highlight the main result */
}
.secondary-results {
display: flex;
flex-wrap: wrap;
justify-content: space-around;
margin-top: 20px;
}
.secondary-results div {
background-color: rgba(255, 255, 255, 0.15);
padding: 15px;
border-radius: 5px;
margin: 10px;
min-width: 150px;
text-align: center;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.secondary-results span {
display: block;
font-size: 1.4em;
font-weight: bold;
}
.secondary-results p {
font-size: 0.9em;
margin: 5px 0 0 0;
opacity: 0.9;
}
.formula-explanation {
font-size: 0.9em;
color: rgba(255, 255, 255, 0.8);
margin-top: 20px;
padding: 10px;
border-top: 1px solid rgba(255, 255, 255, 0.3);
}
.chart-container {
margin-top: 40px;
padding: 25px;
background-color: #fff;
border-radius: 8px;
border: 1px solid var(–border-color);
width: 100%;
box-sizing: border-box;
}
.chart-container h3 {
color: var(–primary-color);
text-align: center;
margin-top: 0;
}
canvas {
width: 100% !important;
height: auto !important;
}
.table-container {
margin-top: 40px;
overflow-x: auto; /* For responsiveness */
}
.table-container h3 {
color: var(–primary-color);
text-align: center;
margin-top: 0;
}
table {
width: 100%;
border-collapse: collapse;
border-radius: 8px;
overflow: hidden; /* To make rounded corners effective */
box-shadow: 0 2px 8px var(–shadow-color);
}
th, td {
padding: 12px 15px;
text-align: left;
border-bottom: 1px solid #ddd;
}
thead th {
background-color: var(–primary-color);
color: white;
font-weight: bold;
}
tbody tr:nth-child(even) {
background-color: #f2f2f2;
}
tbody tr:hover {
background-color: #e9ecef;
}
td {
color: var(–text-color);
}
.article-content {
width: 100%;
margin-top: 40px;
text-align: left;
background-color: #fff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 12px var(–shadow-color);
box-sizing: border-box;
}
.article-content p, .article-content ul, .article-content ol {
margin-bottom: 15px;
font-size: 1.05em;
}
.article-content ul {
list-style-type: disc;
margin-left: 25px;
}
.article-content li {
margin-bottom: 8px;
}
.article-content a {
color: var(–primary-color);
text-decoration: none;
font-weight: bold;
}
.article-content a:hover {
text-decoration: underline;
}
.faq-item {
margin-bottom: 20px;
padding: 15px;
border: 1px solid #eee;
border-radius: 5px;
background-color: #fdfdfd;
}
.faq-item h3 {
margin-top: 0;
margin-bottom: 5px;
font-size: 1.2em;
color: var(–primary-color);
cursor: pointer;
display: flex;
justify-content: space-between;
align-items: center;
}
.faq-item h3::after {
content: '+';
font-size: 1.4em;
font-weight: bold;
color: var(–primary-color);
}
.faq-item.open h3::after {
content: '-';
}
.faq-item .answer {
display: none;
margin-top: 10px;
font-size: 1em;
color: #555;
}
.faq-item.open .answer {
display: block;
}
.related-tools {
margin-top: 30px;
padding: 25px;
background-color: #eef4f9;
border-radius: 8px;
border: 1px solid #dde9f3;
width: 100%;
box-sizing: border-box;
}
.related-tools h3 {
color: var(–primary-color);
text-align: center;
margin-top: 0;
}
.related-tools ul {
list-style: none;
padding: 0;
margin: 0;
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 15px;
}
.related-tools li {
background-color: #fff;
padding: 15px;
border-radius: 5px;
box-shadow: 0 1px 4px rgba(0,0,0,0.1);
transition: transform 0.2s ease;
text-align: center;
}
.related-tools li:hover {
transform: translateY(-2px);
}
.related-tools a {
text-decoration: none;
font-weight: bold;
color: var(–primary-color);
display: block;
}
.related-tools p {
font-size: 0.85em;
color: #666;
margin-top: 5px;
}
footer {
text-align: center;
margin-top: 40px;
padding: 20px;
font-size: 0.9em;
color: #777;
width: 100%;
}
/* Responsive adjustments */
@media (max-width: 768px) {
.main-container {
padding: 20px;
}
h1 {
font-size: 2em;
}
h2 {
font-size: 1.5em;
}
.button-group {
flex-direction: column;
align-items: center;
}
.button-group button, .button-group input[type="button"] {
width: 95%;
margin: 5px 0;
}
.secondary-results {
flex-direction: column;
align-items: center;
}
.secondary-results div {
width: 80%;
margin: 10px 0;
}
}
Enter Your Transaction Details
Calculation Results
Weighted Sum of (Amount x Days)
Formula: Sum of (Transaction Amount * Payment Days) / Total Transaction Amount
Payment Terms Distribution
Visualizing the distribution of payment terms across your transactions.
Transaction Details Table
| Transaction Amount ($) |
Payment Days (Net) |
Weighted Value (Amount x Days) |
What is Weighted Average Payment Terms?
{primary_keyword} is a financial metric used to understand the average time it takes for a business to receive payments from its customers or to make payments to its suppliers, considering the varying amounts involved in each transaction. Unlike a simple average, the weighted average gives more significance to larger transaction amounts. This calculation is crucial for businesses to effectively manage their cash flow, forecast their liquidity, and optimize their working capital. By understanding the weighted average, businesses can identify potential bottlenecks in their payment cycles and make informed decisions regarding credit policies and payment terms offered to clients or negotiated with vendors.
Who should use it: Businesses of all sizes, particularly those with diverse customer bases or supplier networks, financial analysts, accountants, and treasury departments. It's especially valuable for companies offering credit to customers or utilizing payment terms with suppliers, as it provides a realistic picture of cash inflow and outflow timing. Small businesses can use it to understand their collection efficiency, while larger corporations use it for more sophisticated cash flow forecasting and supply chain finance strategies.
Common misconceptions: A common misconception is that a simple average of payment days is sufficient. However, this fails to account for the impact of large-value transactions on overall cash flow. Another misconception is that focusing only on payment terms offered or received is enough; the weighted average brings both sides into a single, actionable metric. Some may also underestimate the influence of offering slightly different terms to different customer segments, which can significantly skew the weighted average.
Weighted Average Payment Terms Formula and Mathematical Explanation
The core concept behind calculating {primary_keyword} is to acknowledge that not all payment terms have equal financial weight. Larger transactions naturally have a more significant impact on cash flow than smaller ones. Therefore, we calculate a weighted sum of the payment days, where each payment day is multiplied by its corresponding transaction amount, and then divide this by the total sum of all transaction amounts.
The formula can be expressed as:
Weighted Average Payment Terms = Σ (Amount_i * Days_i) / Σ Amount_i
Where:
- Σ represents the summation across all transactions.
- Amount_i is the amount of the i-th transaction.
- Days_i is the payment term (in days) for the i-th transaction.
Step-by-step derivation:
- For each individual transaction, multiply the transaction amount by its payment days. This gives you the "weighted value" for that transaction, representing its contribution to the overall payment cycle duration.
- Sum up all these individual weighted values. This gives you the total weighted sum of days across all transactions.
- Sum up all the individual transaction amounts to get the total value of all transactions being considered.
- Divide the total weighted sum of days by the total transaction amount. The result is the {primary_keyword}.
Variables Table
| Variable |
Meaning |
Unit |
Typical Range |
| Amount_i |
The value of an individual transaction or invoice. |
Currency (e.g., USD) |
$0.01 to Millions |
| Days_i |
The number of days within which payment is due (e.g., Net 30 means 30 days). |
Days |
1 to 365+ (can represent payment terms like Net 15, Net 30, Net 60, or even longer industry-specific terms) |
| Σ Amount_i |
The total sum of all transaction amounts considered. |
Currency (e.g., USD) |
Sum of all Amount_i |
| Σ (Amount_i * Days_i) |
The sum of the weighted values for each transaction. |
Currency * Days (e.g., USD-Days) |
Sum of all (Amount_i * Days_i) |
| Weighted Average Payment Terms |
The average payment term, weighted by transaction amount. |
Days |
Typically close to the most common payment terms, but influenced by the distribution of amounts. |
Practical Examples (Real-World Use Cases)
Example 1: Small Business Sales
A small manufacturing company has two recent sales:
- Sale A: $5,000 with Net-30 terms.
- Sale B: $20,000 with Net-60 terms.
Calculation:
- Weighted Value A: $5,000 * 30 days = 150,000 USD-Days
- Weighted Value B: $20,000 * 60 days = 1,200,000 USD-Days
- Total Weighted Value: 150,000 + 1,200,000 = 1,350,000 USD-Days
- Total Transaction Amount: $5,000 + $20,000 = $25,000
- Weighted Average Payment Terms: 1,350,000 USD-Days / $25,000 = 54 days
Interpretation: Although the terms offered are Net-30 and Net-60, the larger $20,000 sale heavily influences the average. The business effectively waits an average of 54 days for its money, not the simple average of (30+60)/2 = 45 days. This indicates a longer cash conversion cycle than a simple average might suggest.
Example 2: Supplier Payments
A retail store is evaluating its payment obligations to two key suppliers:
- Supplier X: Purchase of $15,000 with Net-45 terms.
- Supplier Y: Purchase of $7,000 with Net-20 terms.
Calculation:
- Weighted Value X: $15,000 * 45 days = 675,000 USD-Days
- Weighted Value Y: $7,000 * 20 days = 140,000 USD-Days
- Total Weighted Value: 675,000 + 140,000 = 815,000 USD-Days
- Total Purchase Amount: $15,000 + $7,000 = $22,000
- Weighted Average Payment Terms: 815,000 USD-Days / $22,000 = 37.05 days (approx.)
Interpretation: The store has an average payment term of approximately 37 days. This informs their cash flow planning, as they know a significant portion of their payables is due roughly five weeks out on average. This is higher than the simple average of (45+20)/2 = 32.5 days due to the larger purchase from Supplier X.
How to Use This Weighted Average Payment Terms Calculator
Our calculator simplifies the process of determining your {primary_keyword}. Follow these steps:
- Enter Transaction Details: For each transaction (sale or purchase) you want to include, enter the total `Transaction Amount` in dollars and the `Payment Days` (e.g., 30 for Net-30).
- Add More Terms: Click the "Add Term" button to input details for subsequent transactions. The calculator will dynamically update as you add more entries.
- Review Intermediate Values: As you add terms, you'll see the `Total Amount Processed` and the `Weighted Sum of (Amount x Days)` updating in the results section.
- View Primary Result: The calculator will display the final **Weighted Average Payment Terms** in days, prominently highlighted.
- Analyze Distribution (Table & Chart): Examine the `Transaction Details Table` for a clear breakdown of each entry and the `Payment Terms Distribution` chart for a visual representation of how different payment terms contribute to the weighted average.
- Copy Results: Use the "Copy Results" button to easily transfer the key figures and assumptions to your reports or spreadsheets.
- Reset: If you need to start over, click the "Reset" button to clear all entries and default values.
How to read results: The primary result, displayed in days, tells you the average duration your cash is tied up (for sales) or the average time you have to pay (for purchases), weighted by the transaction value. A higher number generally means longer cash cycles, while a lower number indicates quicker cash conversion.
Decision-making guidance: Use this metric to negotiate better terms with suppliers if your cash flow is tight, or to incentivize faster payments from customers by offering small discounts for early payment. It helps in assessing the financial health and efficiency of your business's credit and collection policies. Understanding your {primary_keyword} is a key component of effective Working Capital Management.
Key Factors That Affect Weighted Average Payment Terms Results
Several factors can significantly influence your calculated {primary_keyword}:
- Transaction Volume and Value: This is the most direct factor. A few very large transactions with extended payment terms can dramatically increase the weighted average, even if most transactions have short terms. Conversely, many small transactions with short terms will keep the average low.
- Industry Standards: Different industries have established norms for payment terms. For example, construction might have longer terms (Net 60 or Net 90) than retail (Net 30). Operating in an industry with extended terms will naturally lead to a higher weighted average. This ties into overall Supply Chain Finance strategies.
- Customer Creditworthiness: Companies with strong credit ratings might negotiate longer payment terms, impacting your sales-side weighted average. Businesses that extend credit based on risk assessment will see this reflected in their calculations.
- Supplier Negotiation Power: If you are a buyer, negotiating longer terms with powerful suppliers increases your weighted average payment terms (payable). Conversely, suppliers with strong bargaining power might enforce shorter terms.
- Discount Policies for Early Payment: Offering a discount (e.g., 2/10 Net 30 – 2% discount if paid in 10 days, otherwise full amount due in 30 days) can shorten your *effective* payment days if customers take the discount. This calculation would need to consider the discount rate and prompt payment rate to adjust the effective Days_i.
- Economic Conditions and Cash Flow Needs: During economic downturns, businesses might face pressure to extend payment terms or delay payments, increasing the weighted average. Conversely, companies prioritizing rapid cash conversion might actively shorten terms or offer aggressive early payment discounts. This impacts overall Cash Flow Forecasting.
- Payment Processing Efficiency: While not directly part of the calculation, how quickly you process invoices and payments can indirectly influence the terms you offer or can negotiate. Streamlined processes might allow for shorter terms.
- Seasonality: Businesses with seasonal peaks may offer different terms during busy periods versus slower times, affecting the weighted average throughout the year.
Frequently Asked Questions (FAQ)
What is the difference between a simple average and a weighted average of payment terms?
A simple average sums all payment days and divides by the number of transactions. A weighted average multiplies each payment day by its corresponding transaction amount before summing and dividing by the total transaction amount. The weighted average is more accurate for understanding cash flow impact because it accounts for the value of each transaction.
Can the weighted average payment terms be negative?
No, payment terms are measured in days, and transaction amounts are positive. Therefore, the weighted average payment terms will always be zero or positive.
How often should I recalculate my weighted average payment terms?
It's recommended to recalculate periodically, such as monthly or quarterly, especially if there are significant changes in your sales volume, customer base, supplier relationships, or overall economic conditions. For businesses with high transaction volumes, more frequent recalculations might be necessary.
What is considered a "good" weighted average payment term?
There is no universal "good" number. It depends heavily on your industry, business model, and financial goals. For a seller, a lower weighted average typically indicates better cash flow. For a buyer, a higher weighted average might indicate favorable payment terms. The key is to ensure it aligns with your
Working Capital Management strategy and industry benchmarks.
Does this calculator account for payment discounts?
The basic calculator does not automatically account for early payment discounts. To factor them in, you would need to calculate the *effective* payment days for transactions where discounts are taken (e.g., for a Net-30 term with a 2/10 option, if paid on day 10, the effective term is 10 days). You would then use these effective days in the calculation.
How can I improve my weighted average payment terms (as a seller)?
To lower your weighted average payment terms (improve cash collection), you can: Offer discounts for early payments, tighten credit policies for new customers, implement stricter follow-up procedures for overdue invoices, and regularly review customer payment histories.
How can I leverage longer weighted average payment terms (as a buyer)?
To increase your weighted average payment terms (improve cash outflow management), you can: Negotiate longer terms with suppliers, explore supply chain financing options, optimize your purchasing strategy to consolidate orders with fewer suppliers for better leverage, and ensure you have robust internal processes to manage upcoming payments effectively.
What if I have many transactions with the same terms?
The calculator handles this efficiently. You can simply add each transaction individually, or if you have a large block of identical terms, you could sum their amounts and enter them as a single entry in the calculator for simplicity, provided they share the same payment days.
var terms = [];
var chartInstance = null;
function validateInput(input, errorId, min, max) {
var errorElement = document.getElementById(errorId);
var value = parseFloat(input.value);
errorElement.textContent = "; // Clear previous error
if (input.value === ") {
errorElement.textContent = 'This field cannot be empty.';
return false;
}
if (isNaN(value)) {
errorElement.textContent = 'Please enter a valid number.';
return false;
}
if (value max) {
errorElement.textContent = 'Value cannot be greater than ' + max + '.';
return false;
}
return true;
}
function addTerm() {
var amountInput = document.getElementById('transactionAmount');
var daysInput = document.getElementById('paymentDays');
var amountError = document.getElementById('amountError');
var daysError = document.getElementById('daysError');
var isValidAmount = validateInput(amountInput, 'amountError', 0, Infinity);
var isValidDays = validateInput(daysInput, 'paymentDays', 0, Infinity); // Corrected ID
if (!isValidAmount || !isValidDays) {
return;
}
var amount = parseFloat(amountInput.value);
var days = parseFloat(daysInput.value);
terms.push({ amount: amount, days: days });
renderTable();
updateResults();
updateChart();
// Clear inputs for next entry
amountInput.value = ";
daysInput.value = ";
amountError.textContent = ";
daysError.textContent = ";
}
function renderTable() {
var tableBody = document.getElementById('termsTableBody');
tableBody.innerHTML = "; // Clear existing rows
var totalAmount = 0;
var weightedTotal = 0;
for (var i = 0; i < terms.length; i++) {
var term = terms[i];
var weightedValue = term.amount * term.days;
totalAmount += term.amount;
weightedTotal += weightedValue;
var row = tableBody.insertRow();
row.insertCell(0).textContent = term.amount.toFixed(2);
row.insertCell(1).textContent = term.days;
row.insertCell(2).textContent = weightedValue.toFixed(2);
}
document.getElementById('termsTable').style.display = 'table';
document.getElementById('table-container').style.display = 'block';
}
function updateResults() {
var totalAmount = 0;
var weightedTotal = 0;
for (var i = 0; i 0) {
avgPaymentDays = weightedTotal / totalAmount;
}
document.getElementById('primaryResult').textContent = avgPaymentDays.toFixed(2) + ' Days';
document.getElementById('avgPaymentDaysValue').textContent = avgPaymentDays.toFixed(2);
document.getElementById('totalAmountValue').textContent = '$' + totalAmount.toFixed(2);
document.getElementById('weightedTotalValue').textContent = weightedTotal.toFixed(2);
document.getElementById('results-container').style.display = 'block';
}
function updateChart() {
if (terms.length === 0) {
document.getElementById('chart-container').style.display = 'none';
return;
}
var ctx = document.getElementById('paymentTermsChart').getContext('2d');
// Aggregate terms by days for the chart
var termsByDay = {};
terms.forEach(function(term) {
if (!termsByDay[term.days]) {
termsByDay[term.days] = { totalAmount: 0, weightedValue: 0 };
}
termsByDay[term.days].totalAmount += term.amount;
termsByDay[term.days].weightedValue += term.amount * term.days;
});
var sortedDays = Object.keys(termsByDay).sort(function(a, b) { return parseInt(a) – parseInt(b); });
var chartDataAmounts = [];
var chartDataWeighted = [];
var chartLabels = [];
sortedDays.forEach(function(days) {
chartLabels.push(days + ' Days');
chartDataAmounts.push(termsByDay[days].totalAmount);
chartDataWeighted.push(termsByDay[days].weightedValue);
});
if (chartInstance) {
chartInstance.destroy();
}
chartInstance = new Chart(ctx, {
type: 'bar',
data: {
labels: chartLabels,
datasets: [{
label: 'Total Amount for Term',
data: chartDataAmounts,
backgroundColor: 'rgba(0, 74, 153, 0.6)',
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1
}, {
label: 'Weighted Sum (Amount x Days)',
data: chartDataWeighted,
backgroundColor: 'rgba(40, 167, 69, 0.6)',
borderColor: 'rgba(40, 167, 69, 1)',
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: true
}
},
plugins: {
legend: {
position: 'top',
},
title: {
display: true,
text: 'Distribution of Payment Terms by Amount and Weighted Value'
}
}
}
});
document.getElementById('chart-container').style.display = 'block';
}
function resetCalculator() {
terms = [];
document.getElementById('transactionAmount').value = ";
document.getElementById('paymentDays').value = ";
document.getElementById('amountError').textContent = ";
document.getElementById('daysError').textContent = ";
document.getElementById('termsTableBody').innerHTML = ";
document.getElementById('results-container').style.display = 'none';
document.getElementById('chart-container').style.display = 'none';
document.getElementById('table-container').style.display = 'none';
if (chartInstance) {
chartInstance.destroy();
chartInstance = null;
}
}
function copyResults() {
var primaryResult = document.getElementById('primaryResult').textContent;
var avgPaymentDaysValue = document.getElementById('avgPaymentDaysValue').textContent;
var totalAmountValue = document.getElementById('totalAmountValue').textContent;
var weightedTotalValue = document.getElementById('weightedTotalValue').textContent;
var tableHtml = document.getElementById('termsTable').outerHTML;
var chartExplanation = document.getElementById('chart-container').querySelector('p').textContent;
var copyText = "Weighted Average Payment Terms Calculation Results:\n\n";
copyText += "Primary Result: " + primaryResult + "\n";
copyText += "Average Payment Days: " + avgPaymentDaysValue + "\n";
copyText += "Total Amount Processed: " + totalAmountValue + "\n";
copyText += "Weighted Sum of (Amount x Days): " + weightedTotalValue + "\n\n";
copyText += "Key Assumptions:\n";
copyText += " – Each entry represents a distinct transaction.\n";
copyText += " – Payment Days are net days until full payment is due.\n\n";
copyText += "Transaction Details:\n" + tableHtml + "\n\n";
copyText += "Chart Visualization:\n" + chartExplanation;
var textArea = document.createElement("textarea");
textArea.value = copyText;
textArea.style.position = "fixed";
textArea.style.left = "-9999px";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied successfully!' : 'Failed to copy results.';
// Optionally show a temporary message to the user
alert(msg);
} catch (err) {
console.error('Unable to copy results.', err);
alert('Failed to copy results. Please copy manually.');
} finally {
document.body.removeChild(textArea);
}
}
// FAQ functionality
document.addEventListener('DOMContentLoaded', function() {
var faqItems = document.querySelectorAll('.faq-item h3');
faqItems.forEach(function(item) {
item.addEventListener('click', function() {
var faqItem = this.parentElement;
faqItem.classList.toggle('open');
});
});
});
// Initial setup for Chart.js (if you were using it, but we are using native canvas)
// For native canvas, we will draw on demand.
// The Chart.js library is NOT included here as per requirements.
// The example updateChart function uses a placeholder for native canvas drawing.
// For a pure native canvas implementation, you'd replace the Chart.js logic with
// canvas drawing API calls. However, using Chart.js is common and often implied
// for dynamic charts unless pure SVG or complex native drawing is specified.
// Given the constraint "No external chart libraries", this would mean drawing manually.
// Let's assume for this example that Chart.js is available globally for simplicity,
// or provide a basic native canvas fallback if needed.
// If Chart.js library IS NOT available, the updateChart function will fail.
// To make it work without external libraries, you'd need a pure SVG or Canvas API implementation.
// For now, let's stick to the common interpretation of 'dynamic chart' which often implies Chart.js.
// If strictly no external libraries means *no* Chart.js, the implementation needs rewrite.
// Re-evaluating requirement: "Native OR Pure SVG (). ❌ No external chart libraries"
// This implies we MUST NOT use Chart.js. Let's implement a basic native canvas drawing.
// Re-writing updateChart to use native Canvas API
function updateChart() {
if (terms.length === 0) {
document.getElementById('chart-container').style.display = 'none';
return;
}
var canvas = document.getElementById('paymentTermsChart');
var ctx = canvas.getContext('2d');
canvas.width = canvas.parentElement.clientWidth; // Set canvas width to parent container width
canvas.height = 400; // Fixed height or dynamic based on content
// Clear previous drawings
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Aggregate terms by days for the chart
var termsByDay = {};
terms.forEach(function(term) {
if (!termsByDay[term.days]) {
termsByDay[term.days] = { totalAmount: 0, weightedValue: 0 };
}
termsByDay[term.days].totalAmount += term.amount;
termsByDay[term.days].weightedValue += term.amount * term.days;
});
var sortedDays = Object.keys(termsByDay).sort(function(a, b) { return parseInt(a) – parseInt(b); });
if (sortedDays.length === 0) {
document.getElementById('chart-container').style.display = 'none';
return;
}
document.getElementById('chart-container').style.display = 'block';
// — Native Canvas Drawing Logic —
var barWidth = (canvas.width / (sortedDays.length * 2)) * 0.8; // Calculate bar width, with spacing
var spacing = (canvas.width – (barWidth * sortedDays.length)) / (sortedDays.length + 1);
var startX = spacing;
// Find max values for scaling
var maxAmount = 0;
var maxWeighted = 0;
sortedDays.forEach(function(days) {
maxAmount = Math.max(maxAmount, termsByDay[days].totalAmount);
maxWeighted = Math.max(maxWeighted, termsByDay[days].weightedValue);
});
var maxY = Math.max(maxAmount, maxWeighted);
if (maxY === 0) maxY = 1; // Avoid division by zero
var chartHeightArea = canvas.height – 60; // Area for bars, leaving space for labels/title
// Draw Bars
ctx.save();
ctx.translate(0, canvas.height – 30); // Move origin to bottom-left area for bars
ctx.scale(1, -1); // Invert Y-axis
var barIndex = 0;
sortedDays.forEach(function(days) {
var amount = termsByDay[days].totalAmount;
var weighted = termsByDay[days].weightedValue;
var amountBarHeight = (amount / maxY) * chartHeightArea;
var weightedBarHeight = (weighted / maxY) * chartHeightArea;
var currentX = spacing + barIndex * (barWidth + spacing);
// Draw Amount Bar (Blue)
ctx.fillStyle = 'rgba(0, 74, 153, 0.6)';
ctx.fillRect(currentX, 0, barWidth, amountBarHeight);
// Draw Weighted Bar (Green) – slightly offset or overlaid depends on visualization choice
// Let's draw them side-by-side for clarity
var weightedBarX = currentX + barWidth + spacing / 4;
ctx.fillStyle = 'rgba(40, 167, 69, 0.6)';
ctx.fillRect(weightedBarX, 0, barWidth, weightedBarHeight);
barIndex++;
});
ctx.restore(); // Restore original coordinate system
// Draw Labels and Legend (simplified)
ctx.save();
ctx.scale(1, 1); // Reset scale
ctx.translate(0, 0); // Reset position
// Labels for bars (Days)
barIndex = 0;
sortedDays.forEach(function(days) {
var currentX = spacing + barIndex * (barWidth + spacing);
var weightedBarX = currentX + barWidth + spacing / 4;
var labelX = weightedBarX + barWidth / 2; // Center label under the green bar
ctx.fillStyle = '#333′;
ctx.font = '10px Arial';
ctx.textAlign = 'center';
ctx.fillText(days + ' Days', labelX, canvas.height – 10);
barIndex++;
});
// Title
ctx.font = '16px Arial';
ctx.textAlign = 'center';
ctx.fillText('Payment Terms Distribution', canvas.width / 2, 20);
// Simplified Legend
var legendY = 40;
var legendSpacing = 150;
ctx.font = '12px Arial';
// Blue Legend
ctx.fillStyle = 'rgba(0, 74, 153, 0.6)';
ctx.fillRect(canvas.width / 2 – legendSpacing / 2, legendY, 15, 10);
ctx.fillStyle = '#333';
ctx.fillText('Total Amount', canvas.width / 2 – legendSpacing / 2 + 25, legendY + 10);
// Green Legend
ctx.fillStyle = 'rgba(40, 167, 69, 0.6)';
ctx.fillRect(canvas.width / 2 – legendSpacing / 2 + 150, legendY, 15, 10);
ctx.fillStyle = '#333';
ctx.fillText('Weighted Sum', canvas.width / 2 – legendSpacing / 2 + 150 + 25, legendY + 10);
ctx.restore();
}