FD Interest Calculator

What is a Fixed Deposit (FD)?

A fixed deposit is a deposit product in which a lump-sum amount is placed with a financial institution for a specified period at an agreed interest rate. The maturity value generally consists of the original deposit plus interest earned according to the product's calculation and compounding terms.

How FD interest is calculated

For a standard compound-interest illustration, a commonly used mathematical model is:

Here, A is the estimated maturity amount, P is the principal, r is the annual interest rate expressed as a decimal, n is the number of compounding periods per year, and t is the time in years.

Your actual FD may follow a different interest calculation or payout method. That is why the calculator lets you choose a compounding frequency and clearly treats the result as an estimate.

Steps to calculate your FD maturity

What this FD calculator can do

• Calculate estimated maturity value and total interest.
• Compare monthly, quarterly and yearly compounding assumptions.
• Use multiple currencies, including INR, USD, EUR, GBP, AED, SGD, CAD, AUD, JPY and CHF.
• Apply an optional tax assumption to the interest portion.
• Estimate inflation-adjusted purchasing power.
• Add extra deposits or variable rate schedules for more flexible scenarios.
• Review yearly summaries, a detailed calculation ledger and downloadable reports.

Example

Suppose you invest a lump sum of ₹1,00,000 for 5 years at an annual rate of 7% with quarterly compounding. The calculator can show the estimated maturity value and interest earned based on those assumptions. Change any of the inputs to explore another scenario.

Open this example directly in the calculator →

FD vs other deposit planning

An FD is typically modeled around a lump-sum deposit. An RD, by contrast, involves repeated contributions over time. If you want to model regular contributions or a more flexible deposit schedule, use the RD mode or Custom Plan mode in the main calculator.