Effortlessly calculate your potential earnings at a 5.0% Annual Percentage Yield.
APY Earnings Calculator
Enter the total amount you are investing.
Annually
Semi-Annually
Quarterly
Monthly
Weekly
Daily
How often your interest is calculated and added to your principal.
The number of years you plan to keep the investment.
Key Metrics
Total Interest Earned:
Final Balance:
Effective Annual Rate (EAR): %
Formula Used
The future value (FV) of an investment with compound interest is calculated using the formula:
FV = P * (1 + r/n)^(n*t)
Where:
FV = Future Value of the investment
P = Principal investment amount (the initial deposit or loan amount)
r = Annual interest rate (as a decimal)
n = Number of times that interest is compounded per year
t = Number of years the money is invested or borrowed for
Total Interest Earned = FV – P
Effective Annual Rate (EAR) = (1 + r/n)^n - 1
Investment Growth Over Time
Yearly Breakdown
Year
Starting Balance
Interest Earned
Ending Balance
Understanding the 5.0% APY Calculator
Welcome to our comprehensive guide on the 5.0% APY calculator. In the dynamic world of finance, understanding how your money grows is paramount. An Annual Percentage Yield (APY) of 5.0% represents a solid return on investment, but the actual earnings can vary significantly based on how often that interest is compounded and the duration of your investment. This calculator is designed to demystify these calculations, providing clear, actionable insights into your potential financial growth. We'll delve deep into the intricacies of APY, explore its formula, provide practical examples, and guide you through using this tool effectively to make informed financial decisions. Understanding your **5.0 apy calculator** results empowers you to maximize your savings and investments.
What is a 5.0% APY Calculator?
A **5.0 apy calculator** is a specialized financial tool designed to compute the total earnings on an investment or savings account that offers a fixed 5.0% Annual Percentage Yield. Unlike a simple interest calculation, APY takes into account the effect of compounding – the process where interest earned is added back to the principal, and subsequently earns its own interest. This means your money grows at an accelerating rate over time. This **5.0 apy calculator** allows users to input their initial investment amount, the compounding frequency (e.g., daily, monthly, annually), and the investment duration. The tool then outputs the projected total interest earned, the final balance, and importantly, the Effective Annual Rate (EAR), which reflects the true yield considering compounding. This calculator is ideal for anyone looking to understand the potential returns on high-yield savings accounts, certificates of deposit (CDs), money market accounts, or even certain types of bonds that quote their yield as APY. Many people mistakenly believe that a 5% nominal rate is the same as 5% APY. The truth is, APY is almost always higher than the nominal rate due to compounding. Understanding this distinction is crucial for effective **5.0 apy calculator** usage.
5.0% APY Formula and Mathematical Explanation
The core of any **5.0 apy calculator** lies in the compound interest formula, which accurately models how investments grow over time. The Annual Percentage Yield (APY) itself is a standardized way to express the return on an investment, reflecting the effect of compounding.
The primary formula used to calculate the future value (FV) of an investment with compound interest is:
FV = P * (1 + r/n)^(n*t)
Let's break down each variable in this fundamental financial equation:
Using this formula, we can derive other important metrics calculated by our **5.0 apy calculator**:
Total Interest Earned: This is simply the difference between the final future value and the initial principal amount. Total Interest = FV - P.
Effective Annual Rate (EAR): This metric shows the *actual* rate of return earned in a year, considering the effects of compounding. It's crucial for comparing different investment options with varying compounding frequencies. The formula for EAR is: EAR = (1 + r/n)^n - 1. For a 5.0% nominal rate (r=0.05), compounding monthly (n=12), the EAR would be approximately (1 + 0.05/12)^12 - 1 ≈ 0.05116 or 5.116%.
Our **5.0 apy calculator** automates these calculations, making complex financial math accessible.
Practical Examples (Real-World Use Cases)
To illustrate the power of a **5.0 apy calculator**, let's consider a couple of scenarios:
Example 1: Saving for a Down Payment
Sarah wants to save for a down payment on a house. She has $15,000 available and finds a high-yield savings account offering a **5.0% APY**, compounded monthly. She plans to invest this money for 3 years before she expects to purchase the house.
Interpretation: After 3 years, Sarah will have earned approximately $2,408.05 in interest. Her total savings will grow to $17,408.05. The account effectively yields 5.116% annually due to monthly compounding, which is better than a simple 5.0% non-compounding interest. This demonstrates how a **5.0 apy calculator** provides crucial details beyond the advertised rate.
Example 2: Long-Term Retirement Growth
John is 30 years old and wants to invest $50,000 for retirement in an account offering a **5.0% APY**, compounded daily. He plans to let it grow for 30 years.
Interpretation: Over 30 years, John's initial $50,000 investment could grow to over $224,000, with the majority of that growth coming from compound interest ($174,857.59). The daily compounding provides a slightly higher effective yield (5.127%) than monthly compounding. This example highlights the significant impact of time and compounding on long-term growth, a key insight provided by a **5.0 apy calculator**. This illustrates the value of starting early and understanding the power of compound interest. You can explore more growth scenarios using our Compound Interest Calculator.
How to Use This 5.0% APY Calculator
Using our **5.0 apy calculator** is straightforward and designed for clarity. Follow these simple steps:
Enter Principal Amount: In the "Initial Investment Amount" field, type the total sum of money you plan to invest or currently have in an account earning 5.0% APY. Ensure you input a valid, non-negative number.
Select Compounding Frequency: Use the dropdown menu for "Compounding Frequency" to choose how often the interest is calculated and added to your principal. Options typically range from Annually to Daily. The more frequent the compounding, the faster your money grows, all else being equal.
Input Investment Duration: In the "Investment Duration (Years)" field, enter the total number of years you expect your investment to grow at this 5.0% APY.
Click Calculate: Press the "Calculate" button.
Interpreting the Results:
Primary Result (Final Balance): This is the most prominent number displayed, showing the total amount you will have at the end of your investment period, including your initial principal and all accumulated interest.
Total Interest Earned: This figure tells you exactly how much money your investment has generated solely from interest over the specified time.
Effective Annual Rate (EAR): This is the true yield of your investment per year, taking compounding into account. It's the best metric for comparing this 5.0% APY investment against others.
Yearly Breakdown Table: This table provides a year-by-year view of your investment's growth, showing the balance at the start of each year, the interest earned during that year, and the balance at the end of the year.
Growth Chart: The dynamic chart visually represents how your investment grows over time, making it easy to see the accelerating effect of compounding.
Decision-Making Guidance: Use the calculated results to compare different savings vehicles or investment opportunities. If you're deciding between two accounts offering 5.0% APY but different compounding frequencies, the EAR calculation will help you determine which one offers a slightly better return. The yearly breakdown and chart can also help you visualize progress towards financial goals, such as saving for a Mortgage Calculator down payment or retirement.
Key Factors That Affect 5.0% APY Results
While a **5.0 apy calculator** provides precise projections based on set inputs, several real-world factors can influence your actual earnings and the applicability of the calculator's results:
Compounding Frequency: As demonstrated, how often interest is calculated and added to the principal significantly impacts the final amount. Daily compounding yields slightly more than monthly, which yields more than quarterly, and so on. The calculator accounts for this directly.
Time Horizon: The longer your money is invested, the more pronounced the effect of compounding becomes. Small differences in earnings each year accumulate dramatically over decades. This is why starting early is often a key wealth-building strategy.
Principal Amount: While the rate (5.0% APY) remains the same, a larger initial investment will naturally generate more absolute interest and a higher final balance compared to a smaller principal over the same period.
Fees and Charges: Many financial products, especially those marketed with attractive APYs, may come with hidden fees (e.g., monthly service fees, transaction fees, early withdrawal penalties). These fees reduce your net return and are not typically factored into a basic APY calculation. Always read the fine print.
Taxes: Interest earned is usually considered taxable income. Depending on your tax bracket and the type of account (taxable vs. tax-advantaged like an IRA or 401k), taxes can significantly reduce your take-home earnings. A **5.0 apy calculator** typically shows pre-tax returns.
Inflation: The stated 5.0% APY is a nominal return. The *real* return on your investment is the nominal return minus the rate of inflation. If inflation is 3%, your real purchasing power increase is only about 2%. A **5.0 apy calculator** doesn't account for inflation, so it's important to consider it when assessing the true value of your earnings.
Changes in Interest Rates: For variable-rate accounts, the 5.0% APY may not be guaranteed for the entire investment period. Market fluctuations could cause the rate to increase or decrease, altering the final outcome. This calculator assumes a fixed 5.0% rate.
Frequently Asked Questions (FAQ)
Q1: Is 5.0% APY good?
A: Whether 5.0% APY is "good" depends on the current economic climate, prevailing interest rates, and the type of account. In periods of low interest rates, 5.0% APY is considered very attractive, especially for savings or cash accounts. In high-interest rate environments, it might be average. It's essential to compare it to rates offered by similar products and consider inflation.
Q2: What's the difference between APY and APR?
A: APY (Annual Percentage Yield) reflects the total return on an investment or savings account, including the effects of compounding interest. APR (Annual Percentage Rate) typically represents the cost of borrowing money, including fees, and usually doesn't include compounding effects in the same way. For savers, APY is the relevant metric.
Q3: How does compounding frequency affect my earnings with a 5.0% APY?
A: More frequent compounding means your interest is calculated and added to your principal more often. This leads to slightly higher overall earnings because the newly added interest starts earning interest itself sooner. Daily compounding yields more than monthly, which yields more than quarterly, etc., for the same 5.0% nominal rate.
Q4: Can I use this calculator for loans?
A: No, this **5.0 apy calculator** is specifically designed for calculating earnings on investments and savings accounts that offer a positive yield (APY). For loans, you would typically use an APR (Annual Percentage Rate) and a loan amortization calculator.
Q5: What if the APY changes after I invest?
A: If the APY changes (e.g., for a variable-rate account), the results from this calculator will no longer be accurate for the future period. You would need to use the new rate and potentially re-run the calculator for the remaining term.
Q6: Does the calculator account for taxes on interest earned?
A: No, this calculator provides pre-tax figures. Interest earned is generally considered taxable income in most jurisdictions. You should consult a tax professional to understand your specific tax obligations.
Q7: What is the maximum APY I can realistically expect?
A: The maximum APY achievable varies greatly depending on economic conditions, central bank policies, and the risk profile of the financial product. While 5.0% APY is currently strong for savings accounts, historical rates have varied significantly. High-yield savings accounts, CDs, and money market accounts are common places to find competitive APYs.
Q8: How do I find accounts offering a 5.0% APY?
A: Look for high-yield savings accounts (HYSAs), Certificates of Deposit (CDs), and money market accounts from online banks, credit unions, and traditional banks. Online banks often offer more competitive rates due to lower overhead costs. Always compare APYs and terms before opening an account. Remember to check out our Savings Goal Calculator to plan your future savings.
Related Tools and Internal Resources
Compound Interest Calculator – Explore how compound interest works with different rates, frequencies, and timeframes.
Savings Goal Calculator – Plan how much you need to save regularly to reach a specific financial target.
Inflation Calculator – Understand how inflation erodes the purchasing power of your money over time.
CD Calculator – Calculate returns on Certificates of Deposit with various terms and interest rates.
Money Market Calculator – Estimate earnings from money market accounts, which often offer competitive APYs.
Investment Return Calculator – Calculate the total return on various types of investments, considering capital gains and dividends.
var principalInput = document.getElementById("principal");
var compoundingFrequencySelect = document.getElementById("compoundingFrequency");
var investmentYearsInput = document.getElementById("investmentYears");
var resultDisplay = document.getElementById("result-display");
var totalInterestSpan = document.getElementById("totalInterest");
var finalBalanceSpan = document.getElementById("finalBalance");
var effectiveRateSpan = document.getElementById("effectiveRate");
var intermediateResultsDiv = document.querySelector(".intermediate-results");
var yearlyBreakdownTableBody = document.querySelector("#yearlyBreakdownTable tbody");
var growthChartCanvas = document.getElementById("growthChart");
var chartInstance = null;
var fixedApyRate = 0.05; // 5.0%
function formatCurrency(amount) {
return "$" + amount.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');
}
function formatNumber(amount) {
return amount.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');
}
function showError(inputId, message) {
var errorDiv = document.getElementById(inputId + "-error");
if (errorDiv) {
errorDiv.textContent = message;
errorDiv.classList.add("visible");
}
}
function clearError(inputId) {
var errorDiv = document.getElementById(inputId + "-error");
if (errorDiv) {
errorDiv.textContent = "";
errorDiv.classList.remove("visible");
}
}
function validateInputs() {
var principal = parseFloat(principalInput.value);
var investmentYears = parseFloat(investmentYearsInput.value);
var isValid = true;
clearError("principal");
clearError("investmentYears");
if (isNaN(principal) || principalInput.value.trim() === "") {
showError("principal", "Please enter a valid initial investment amount.");
isValid = false;
} else if (principal < 0) {
showError("principal", "Initial investment cannot be negative.");
isValid = false;
}
if (isNaN(investmentYears) || investmentYearsInput.value.trim() === "") {
showError("investmentYears", "Please enter a valid investment duration.");
isValid = false;
} else if (investmentYears < 0) {
showError("investmentYears", "Investment duration cannot be negative.");
isValid = false;
}
return isValid;
}
function calculateApy() {
if (!validateInputs()) {
resultDisplay.style.display = "block";
resultDisplay.textContent = "Please correct the errors above.";
resultDisplay.classList.add("error");
intermediateResultsDiv.style.display = "none";
return;
}
var principal = parseFloat(principalInput.value);
var compoundingFrequency = parseInt(compoundingFrequencySelect.value);
var investmentYears = parseFloat(investmentYearsInput.value);
var n = compoundingFrequency;
var t = investmentYears;
var r = fixedApyRate; // 5.0%
var futureValue = principal * Math.pow((1 + r / n), (n * t));
var totalInterest = futureValue – principal;
var effectiveAnnualRate = (Math.pow((1 + r / n), n) – 1) * 100;
resultDisplay.style.display = "block";
resultDisplay.textContent = "Final Balance: " + formatCurrency(futureValue);
resultDisplay.classList.remove("error");
totalInterestSpan.textContent = formatCurrency(totalInterest);
finalBalanceSpan.textContent = formatCurrency(futureValue);
effectiveRateSpan.textContent = effectiveAnnualRate.toFixed(3);
intermediateResultsDiv.style.display = "block";
// Update Table
yearlyBreakdownTableBody.innerHTML = ""; // Clear previous rows
var currentBalance = principal;
var dataForChart = { years: [0], balances: [principal], interests: [0] };
for (var year = 1; year <= investmentYears; year++) {
var startingBalance = currentBalance;
var interestForYear = 0;
// Calculate interest for the full year based on compounding frequency
for (var period = 0; period < n; period++) {
var interestThisPeriod = currentBalance * (r / n);
currentBalance += interestThisPeriod;
interestForYear += interestThisPeriod;
}
// Handle fractional years for the last period if necessary for chart precision
if (year < investmentYears) {
dataForChart.years.push(year);
dataForChart.balances.push(currentBalance);
dataForChart.interests.push(interestForYear);
} else {
// For the final year, use the final calculated future value for chart accuracy
dataForChart.years.push(year);
dataForChart.balances.push(futureValue);
dataForChart.interests.push(futureValue – startingBalance); // Interest for the last year
}
var row = yearlyBreakdownTableBody.insertRow();
row.innerHTML = `
${year}
${formatCurrency(startingBalance)}
${formatCurrency(interestForYear)}
${formatCurrency(currentBalance)}
`;
}
// Ensure final values are precisely represented in table if years are integer
if (investmentYears === Math.floor(investmentYears) && investmentYears > 0) {
var lastRow = yearlyBreakdownTableBody.rows[yearlyBreakdownTableBody.rows.length – 1];
lastRow.cells[1].textContent = formatCurrency(currentBalance / Math.pow((1 + r / n), (n * (investmentYears – Math.floor(investmentYears)))) ) ; // Approximate previous year end balance
lastRow.cells[2].textContent = formatCurrency(futureValue – parseFloat(lastRow.cells[1].textContent.replace(/[\$,]/g, ")));
lastRow.cells[3].textContent = formatCurrency(futureValue);
dataForChart.balances[dataForChart.balances.length – 1] = futureValue; // Correct final balance in chart data
} else if (investmentYears > 0) {
// If investmentYears is not an integer, the last entry in the loop should be the final futureValue
dataForChart.balances[dataForChart.balances.length – 1] = futureValue;
}
updateChart(dataForChart);
}
function updateChart(data) {
if (chartInstance) {
chartInstance.destroy(); // Destroy previous chart instance
}
var ctx = growthChartCanvas.getContext('2d');
chartInstance = new Chart(ctx, {
type: 'line',
data: {
labels: data.years.map(function(year) { return year === 0 ? 'Start' : year.toString(); }),
datasets: [{
label: 'Ending Balance',
data: data.balances,
borderColor: 'var(–primary-color)',
backgroundColor: 'rgba(0, 74, 153, 0.1)',
fill: true,
tension: 0.1
}, {
label: 'Total Interest Earned',
data: data.interests,
borderColor: 'var(–success-color)',
backgroundColor: 'rgba(40, 167, 69, 0.1)',
fill: true,
tension: 0.1
}]
},
options: {
responsive: true,
maintainAspectRatio: true, // Allow aspect ratio adjustments
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Amount ($)'
}
},
x: {
title: {
display: true,
text: 'Year'
}
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || ";
if (label) {
label += ': ';
}
if (context.parsed.y !== null) {
label += formatCurrency(context.parsed.y);
}
return label;
}
}
}
}
}
});
}
function resetCalculator() {
principalInput.value = "";
compoundingFrequencySelect.value = "12"; // Default to Monthly
investmentYearsInput.value = "";
resultDisplay.style.display = "none";
intermediateResultsDiv.style.display = "none";
yearlyBreakdownTableBody.innerHTML = "";
if (chartInstance) {
chartInstance.destroy();
chartInstance = null;
}
clearError("principal");
clearError("investmentYears");
}
function copyResults() {
var principal = principalInput.value.trim();
var compoundingFrequency = compoundingFrequencySelect.options[compoundingFrequencySelect.selectedIndex].text;
var investmentYears = investmentYearsInput.value.trim();
var finalBalance = finalBalanceSpan.textContent;
var totalInterest = totalInterestSpan.textContent;
var effectiveRate = effectiveRateSpan.textContent;
if (finalBalance === "") {
alert("Please perform a calculation before copying results.");
return;
}
var summary = `5.0% APY Calculator Results:\n\n` +
`Initial Investment: ${formatCurrency(parseFloat(principal))}\n` +
`Compounding Frequency: ${compoundingFrequency}\n` +
`Investment Duration: ${investmentYears} years\n\n` +
`——————–\n\n` +
`Final Balance: ${finalBalance}\n` +
`Total Interest Earned: ${totalInterest}\n` +
`Effective Annual Rate: ${effectiveRate}%\n`;
// Using a temporary textarea to copy to clipboard
var textArea = document.createElement("textarea");
textArea.value = summary;
textArea.style.position = "fixed"; // Avoid scrolling to bottom of page in MS Edge.
textArea.style.top = 0;
textArea.style.left = 0;
textArea.style.width = '2em';
textArea.style.height = '2em';
textArea.style.padding = '0';
textArea.style.border = 'none';
textArea.style.outline = 'none';
textArea.style.boxShadow = 'none';
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied to clipboard!' : 'Copying text command was unsuccessful';
// alert(msg); // Optional: provide feedback to user
} catch (err) {
// alert('Oops, unable to copy'); // Optional: provide feedback to user
}
document.body.removeChild(textArea);
}
// Initial calculation on load if inputs have default values or are pre-filled
document.addEventListener('DOMContentLoaded', function() {
// Trigger calculation if default values are set or page loads with values
if(principalInput.value && investmentYearsInput.value) {
calculateApy();
}
});
// Basic Chart.js integration (assuming it's available globally, or you would include it)
// In a real scenario, you'd include Chart.js via CDN or local file.
// For this single-file requirement, we'll assume Chart.js is not available and use a fallback or note it.
// Since NO external libraries are allowed per prompt, we will implement a simple SVG or Canvas manually if Chart.js is truly unavailable.
// However, the prompt *does* mention Canvas, which usually implies a library like Chart.js.
// Let's assume for this exercise that a minimal pure JS charting solution is expected if Chart.js isn't built-in.
// Re-reading: "Native OR Pure SVG ()" – This implies NO libraries.
// I will use Canvas API directly to draw a simple line chart as an example.
// NOTE: A full-featured, dynamic chart with pure Canvas API without libraries is complex.
// The below is a simplified representation and may require significant enhancement for production.
// Re-evaluation: Given the complexity of drawing charts with raw Canvas API and the common understanding of 'Canvas' in web dev often implying libraries,
// and the specific instruction to use OR pure SVG, I will proceed with the assumption that Chart.js could be *implicitly* allowed for the canvas element IF it were a real-world scenario,
// but since the prompt strictly forbids external libraries, a full pure JS Canvas implementation is required. This is highly complex.
// To adhere to the "NO external libraries" rule strictly, I will replace the Chart.js dependency with a placeholder note and adjust the expectation.
// A truly library-free Canvas chart is beyond a simple copy-paste solution for this context.
// — START: Manual Canvas Charting (Simplified & Illustrative) —
// This is a placeholder for a pure Canvas implementation. Building a full charting library from scratch is extensive.
// A robust solution would require significant development.
// For demonstration purposes, I will mock the data and structure, and indicate where drawing would occur.
function drawSimpleCanvasChart(data) {
var canvas = document.getElementById('growthChart');
if (!canvas) return;
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear previous drawing
var width = canvas.width;
var height = canvas.height;
var padding = 40;
// Find max balance for scaling
var maxBalance = Math.max(…data.balances);
if (maxBalance === 0) maxBalance = 1; // Avoid division by zero
// Draw Axes
ctx.strokeStyle = '#ccc';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(padding, height – padding); // X-axis start
ctx.lineTo(width – padding, height – padding); // X-axis end
ctx.moveTo(padding, padding); // Y-axis start
ctx.lineTo(padding, height – padding); // Y-axis end
ctx.stroke();
// Draw X-axis labels (Years)
ctx.fillStyle = '#555';
ctx.textAlign = 'center';
var numLabels = data.years.length;
for (var i = 0; i < numLabels; i++) {
var xPos = padding + (i / (numLabels – 1)) * (width – 2 * padding);
if (i === 0) xPos = padding; // First label at the start
if (i === numLabels – 1) xPos = width – padding; // Last label at the end
ctx.fillText(data.years[i] === 0 ? 'Start' : data.years[i].toString(), xPos, height – padding + 15);
}
// Draw Y-axis labels (Balance) – Simplified for few points
ctx.textAlign = 'right';
ctx.fillText('0', padding – 10, height – padding);
ctx.fillText(formatCurrency(maxBalance / 2).replace(/[\$,]/g, ''), padding – 10, height / 2);
ctx.fillText(formatCurrency(maxBalance).replace(/[\$,]/g, ''), padding – 10, padding + 10);
// Draw Data Series (Lines)
ctx.lineWidth = 2;
// Draw Ending Balance Line
ctx.strokeStyle = 'var(–primary-color)'; // Use primary color variable if available, else fallback
ctx.beginPath();
for (var i = 0; i < data.balances.length; i++) {
var xPos = padding + (i / (numLabels – 1)) * (width – 2 * padding);
if (i === 0) xPos = padding;
if (i === numLabels – 1) xPos = width – padding;
var yPos = height – padding – (data.balances[i] / maxBalance) * (height – 2 * padding);
if (i === 0) {
ctx.moveTo(xPos, yPos);
} else {
ctx.lineTo(xPos, yPos);
}
}
ctx.stroke();
// Draw Total Interest Line (Simplified – showing end-of-year interest)
// Note: This is a simplification. A true interest growth curve is complex.
// We'll plot the cumulative interest at the end of each year for visualization.
ctx.strokeStyle = 'var(–success-color)'; // Use success color variable
ctx.beginPath();
var cumulativeInterest = 0;
for (var i = 0; i < data.interests.length; i++) {
var xPos = padding + (i / (numLabels – 1)) * (width – 2 * padding);
if (i === 0) xPos = padding;
if (i === numLabels – 1) xPos = width – padding;
cumulativeInterest += data.interests[i]; // Accumulate interest for the year/period
var yPos = height – padding – (cumulativeInterest / maxBalance) * (height – 2 * padding);
if (i === 0) {
ctx.moveTo(xPos, yPos);
} else {
ctx.lineTo(xPos, yPos);
}
}
ctx.stroke();
// Re-add axes after drawing lines to ensure they are on top
ctx.strokeStyle = '#ccc';
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(padding, height – padding); // X-axis start
ctx.lineTo(width – padding, height – padding); // X-axis end
ctx.moveTo(padding, padding); // Y-axis start
ctx.lineTo(padding, height – padding); // Y-axis end
ctx.stroke();
}
// Replace chart update logic
function updateChart(data) {
// Ensure canvas has dimensions defined in CSS or directly
var canvas = document.getElementById('growthChart');
if (canvas) {
canvas.width = canvas.parentElement.clientWidth * 0.95; // Adjust dynamically
canvas.height = canvas.parentElement.clientWidth * 0.4; // Maintain aspect ratio
drawSimpleCanvasChart(data);
}
}
// Modify calculateApy to use drawSimpleCanvasChart
// (The call `updateChart(dataForChart);` inside calculateApy remains the same)
// — END: Manual Canvas Charting —