Quarterly (Standard)
Monthly
Half-Yearly
Annually
No Compounding (Simple Interest)
Principal Amount:0
Total Interest Earned:0
Maturity Date (Approx):–
Maturity Value:0
How to Find the Best FD Rates
Fixed Deposits (FDs) are one of the most secure investment instruments available, offering guaranteed returns over a specific period. Unlike market-linked investments, an FD offers a fixed rate of return determined at the time of account opening. This calculator helps you project your earnings based on current bank offers.
To maximize your returns, consider the following factors when comparing the best FD rates:
Tenure Selection: Banks often offer higher rates for specific tenures (e.g., 444 days or 3 years). Use the calculator to compare short-term vs. long-term yields.
Compounding Frequency: The frequency at which interest is calculated affects your total yield. Quarterly compounding (standard for many institutions) yields more than annual compounding.
Senior Citizen Benefits: Most financial institutions offer an additional 0.25% to 0.75% on the base rate for senior citizens.
Understanding the Calculation Formula
This calculator uses the compound interest formula to determine your maturity amount:
A = P (1 + r/n) ^ (n * t)
A: Maturity Amount
P: Principal Deposit Amount
r: Annual Rate of Return (decimal)
n: Number of compounding periods per year
t: Time in years
When "No Compounding" is selected, the calculator utilizes the Simple Interest formula (P * r * t), which is typically used for short-term deposits or specific payout schemes.
Why Compare FD Rates?
Even a small difference in percentage points can significantly impact your corpus over a long tenure due to the power of compounding. For example, on a deposit of 1,000,000 for 5 years, a difference of just 0.5% in the rate can result in a variance of thousands in earnings. Always check the latest rates from multiple banks and NBFCs before locking in your funds.
function calculateMaturity() {
// 1. Get Input Values
var principal = parseFloat(document.getElementById('depositAmount').value);
var ratePercent = parseFloat(document.getElementById('returnRate').value);
var periodVal = parseFloat(document.getElementById('periodValue').value);
var periodUnit = document.getElementById('periodUnit').value;
var frequency = parseFloat(document.getElementById('compoundFreq').value);
var resultsArea = document.getElementById('resultsArea');
// 2. Validation
if (isNaN(principal) || principal <= 0) {
alert("Please enter a valid deposit amount.");
return;
}
if (isNaN(ratePercent) || ratePercent < 0) {
alert("Please enter a valid rate of return.");
return;
}
if (isNaN(periodVal) || periodVal <= 0) {
alert("Please enter a valid investment period.");
return;
}
// 3. Convert Tenure to Years (t)
var timeInYears = 0;
if (periodUnit === 'years') {
timeInYears = periodVal;
} else if (periodUnit === 'months') {
timeInYears = periodVal / 12;
} else if (periodUnit === 'days') {
timeInYears = periodVal / 365;
}
// 4. Calculation Logic
var maturityAmount = 0;
var totalInterest = 0;
if (frequency === 0) {
// Simple Interest Logic (No Compounding)
// A = P + (P * r * t)
var simpleInterest = principal * (ratePercent / 100) * timeInYears;
maturityAmount = principal + simpleInterest;
} else {
// Compound Interest Logic
// A = P * (1 + r/n)^(n*t)
var r = ratePercent / 100;
var n = frequency;
var t = timeInYears;
maturityAmount = principal * Math.pow((1 + (r / n)), (n * t));
}
totalInterest = maturityAmount – principal;
// 5. Calculate Maturity Date
var today = new Date();
var maturityDate = new Date();
if (periodUnit === 'years') {
maturityDate.setFullYear(today.getFullYear() + Math.floor(periodVal));
maturityDate.setMonth(today.getMonth() + (periodVal % 1) * 12);
} else if (periodUnit === 'months') {
maturityDate.setMonth(today.getMonth() + periodVal);
} else if (periodUnit === 'days') {
maturityDate.setDate(today.getDate() + periodVal);
}
var dateOptions = { year: 'numeric', month: 'long', day: 'numeric' };
var dateString = maturityDate.toLocaleDateString(undefined, dateOptions);
// 6. Display Results
// Formatting numbers with commas and 2 decimals
document.getElementById('displayPrincipal').innerText = principal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('displayInterest').innerText = totalInterest.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('displayMaturity').innerText = maturityAmount.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('displayDate').innerText = dateString;
// Show result section
resultsArea.style.display = "block";
}