FD Calculator
Work out the maturity value and interest on a fixed deposit — enter your amount, rate, tenure and compounding frequency to see the result instantly.
How FD interest works
A fixed deposit pays compound interest on a lump sum over a fixed tenure. The maturity value is calculated as M = P × (1 + r/f)f×t, where P is the principal, r the annual rate, f the compounding frequency per year (banks usually compound quarterly) and t the tenure in years. More frequent compounding yields a slightly higher maturity.
Real-world example
Deposit ₹1,00,000 at 6.5% for 5 years, compounded quarterly, and it matures to about ₹1,38,040 — earning roughly ₹38,040 in interest. Raising the rate or tenure, or compounding more often, increases the maturity.
Tips
- Compare the effective yield, not just the headline rate — compounding frequency matters.
- Remember that FD interest is taxable as income under current rules.
- Laddering multiple FDs can balance liquidity and returns.
Frequently asked questions
Using compound interest: M = P × (1 + r/f)^(f×t), where P is the principal, r the annual rate, f the compounding frequency per year and t the tenure in years.
Yes. More frequent compounding (e.g. quarterly vs annually) produces a slightly higher maturity value for the same rate.
Yes. Fixed deposit interest is generally taxable as income under current rules. Check the latest rules or a tax professional.
Yes. It is free and runs entirely in your browser.