FD Calculator – Calculate Fixed Deposit Maturity Instantly
Maturity Amount
Total Interest Earned
Principal Amount
What is an FD Calculator?
A Fixed Deposit (FD) Calculator is a financial planning tool that lets you instantly calculate how much your deposit will grow by maturity. Enter your principal amount, the bank's offered interest rate, your investment tenure, and the compounding frequency — and the calculator shows you the exact maturity amount and total interest earned.
How FD Interest is Calculated
Most banks in India calculate FD returns using the compound interest formula. Here is a worked example:
- Principal: ₹1,00,000
- Interest Rate: 7% per annum
- Tenure: 3 years
- Compounding: Quarterly (n = 4)
A = P × (1 + r/n)^(n×t)
A = 1,00,000 × (1 + 0.07/4)^(4×3)
A = 1,00,000 × (1.0175)^12
Maturity Amount ≈ ₹1,23,144 | Interest Earned ≈ ₹23,144
Compounding Frequencies Explained
Yearly Compounding
Interest is added to your principal once a year. This is the simplest frequency and gives the lowest effective yield among the four options.
Half-Yearly Compounding
Interest is compounded every six months (twice a year). Many traditional bank FDs and post office deposits use this frequency.
Quarterly Compounding
Interest is added to the principal every three months (four times a year). Most major Indian banks — SBI, HDFC, ICICI, Axis — use quarterly compounding for FDs.
Monthly Compounding
Interest is added every month (twelve times a year). Monthly compounding gives the highest effective yield for the same nominal interest rate.
Factors Affecting Your FD Returns
- Principal Amount: A larger deposit directly increases both the interest earned and the final maturity value.
- Interest Rate: Even a 0.5% difference in rate compounds significantly over a long tenure. Senior citizens typically receive an additional 0.25%–0.50%.
- Tenure: Longer tenures let compounding work in your favour — small differences in time period can lead to substantially different maturity amounts.
- Compounding Frequency:More frequent compounding (monthly > quarterly > half-yearly > yearly) results in a higher effective rate of return on the same nominal rate.
Frequently Asked Questions About FD Calculator
What is an FD Calculator?
An FD Calculator is an online tool that helps you estimate the maturity amount and total interest earned on a Fixed Deposit based on your principal, interest rate, tenure, and compounding frequency.
How is FD interest calculated?
FD interest is calculated using the compound interest formula: A = P × (1 + r/n)^(n×t), where P is the principal, r is the annual rate ÷ 100, n is the compounding frequency per year, and t is the tenure in years.
Which compounding frequency gives the highest FD return?
Monthly compounding gives the highest return because interest is added to the principal most frequently — 12 times a year — allowing each subsequent period to earn interest on a growing balance.
What is the difference between simple and compound interest FD?
In a simple interest FD, interest is calculated only on the original principal throughout the tenure. In a compound interest FD, interest earned is added back to the principal at each interval so future interest is calculated on a growing amount — leading to higher overall returns.
Can I calculate FD returns for a tenure in months?
Yes. Toggle the tenure input to "Months" and enter the duration directly in months. The calculator automatically converts it to years for the formula.
How accurate is Calcon's FD Calculator?
Calcon's FD Calculator uses the standard compound interest formula used by all major Indian banks. Results are accurate to 2 decimal places and match bank FD statements closely.
Is Calcon's FD Calculator free to use?
Yes, completely free — no sign-up, no download, no usage limit. Works on all devices including mobile.
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