What is an FD calculator?
A fixed deposit (FD) calculator is a free online tool that projects how much a one-time deposit will grow to by the end of a chosen tenure. You enter the principal, the annual interest rate, the deposit period, and the compounding frequency — and the tool instantly returns the total maturity amount and the interest earned.
Fixed deposits are among the most widely used savings instruments in India because the rate is locked in at the start and does not move with markets. The maturity value is therefore known from day one, making an FD calculator genuinely useful rather than just indicative.
How does the FD calculator work?
Most Indian banks compound FD interest quarterly, though the frequency can vary. The calculator uses the standard compound interest formula:
A = P × (1 + r/f)(f × t)
Here A is the maturity amount, P is the principal deposit, r is the annual interest rate as a decimal, f is the number of compounding periods per year, and t is the tenure in years. Total interest earned is A minus P.
Worked example: deposit ₹1,00,000 at 7% per annum for 5 years, compounded quarterly. Using P = 1,00,000, r = 0.07, f = 4 and t = 5, the formula gives A = 1,00,000 × (1.0175)20, which equals approximately ₹1,41,478. The interest earned over five years is ₹41,478 — about 41% of the original deposit, purely through compounding.
How do I use Chola Securities' FD calculator?
Using the calculator takes four steps.
- Enter the deposit amount — the lump sum you plan to invest.
- Enter the annual interest rate — the rate offered by the bank or institution.
- Set the tenure — the number of years or months you want the deposit to run.
- Choose the compounding frequency — yearly, half-yearly, quarterly, or monthly.
The result updates instantly. Adjust any input to compare how a higher rate, a longer tenure, or a different compounding frequency changes the final maturity value.
Why use the FD calculator?
- Know your returns in advance before committing your deposit.
- Compare how the maturity value changes across different tenures and rates.
- Decide whether an FD suits your goal better than another instrument by seeing the exact figure, not an approximation.
- Avoid manual calculation errors — the compound interest formula with quarterly compounding is not simple to compute by hand.
- Work backwards from a savings goal to figure out how large a deposit is needed today.