FD Calculator: How to Calculate Fixed Deposit Maturity (2026)

A Fixed Deposit (FD) is one of the safest ways to grow savings. You deposit a lump sum for a fixed period and earn interest. An FD calculator shows you the maturity amount and the interest you will earn.

How is FD interest calculated?

Most banks use compound interest. The formula is A = P(1 + r/n)^(nt), where P is your deposit, r is the annual rate, n is how often interest is compounded per year, and t is the number of years.

What does compounding frequency mean?

Compounding is when earned interest itself starts earning interest. Most banks compound FD interest quarterly (4 times a year). More frequent compounding gives a slightly higher maturity amount.

Example

A ₹1,00,000 FD at 7% per year for 5 years, compounded quarterly, grows to about ₹1,41,478. So you earn around ₹41,478 in interest.

Things to remember

• FD rates change over time — always check your bank’s current rate.
• Interest earned is taxable, and banks may deduct TDS.
• Breaking an FD early usually reduces the interest you get.

How to use our free FD calculator

1. Open the FD calculator.
2. Enter the deposit amount, interest rate and tenure.
3. Choose the compounding frequency (quarterly is most common).
4. Click Calculate to see the maturity amount and interest earned.