FD Calculator
Calculate fixed deposit maturity with compound interest. Compare against simple interest.
Formula: A = P(1 + r/n)nt · tenure ≈ 3.00 years
With simple interest (I = P × r × t), you would earn ₹22,500 for a maturity of ₹1,22,500. Compounding adds ₹2,472 extra over the same tenure.
What is the FD Calculator?
The FD / Compound Interest Calculator estimates the maturity value of a fixed deposit (or any compound-interest investment) from principal, annual rate, tenure and compounding frequency.
Banks commonly compound quarterly for FDs. Changing the compounding frequency changes maturity even when the advertised annual rate looks the same — this tool makes that visible next to a simple-interest comparison.
Figures are mathematical estimates for planning. Actual bank payouts may differ slightly due to day-count conventions, TDS or product-specific rules.
How to use the FD Calculator
- 1Enter principal, annual interest rate and tenure (years and months).
- 2Choose compounding: monthly, quarterly, half-yearly or yearly.
- 3Read maturity amount, interest earned and the simple-interest comparison.
When to use the FD Calculator
- Compare two bank FD offers with different compounding.
- Estimate proceeds before parking an emergency fund.
- Teach compound vs simple interest with concrete numbers.
- Plan a goal amount by trying different tenures.
Key features
- Compound interest maturity formula
- Flexible compounding periods
- Years + months tenure
- Simple-interest comparison and visual breakdown
Important notes
- Does not deduct TDS or add special senior-citizen rate logic automatically — adjust the rate yourself if needed.
- Currency display defaults to INR formatting; the math works for any currency amount.
Frequently asked questions
Which compounding should I pick?
Match your bank’s FD sheet — quarterly is common in India.
Why does quarterly beat yearly at the same rate?
Interest is added to principal more often, so later periods earn interest on interest.
Is TDS included?
No. If TDS applies, your credited amount will be lower than the gross estimate.
Can I model recurring deposits?
This version models a single lump-sum principal. Use an RD calculator for monthly deposits.
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