FD Calculator
Free online FD calculator — calculate Fixed Deposit maturity amount, total interest earned and returns with quarterly, half-yearly or yearly compounding. Includes growth chart and formula.
FD formula explained
Fixed deposits use compound interest. The maturity amount is calculated as:
- A = maturity amount
- P = principal (deposit amount)
- r = annual interest rate (decimal)
- n = compounding times per year (4, 2 or 1)
- t = time period in years
Step-by-step breakdown
Calculate above to see your personalised step-by-step working.
What is a Fixed Deposit?
A Fixed Deposit (FD) is a savings instrument where you lock a lump sum for a fixed term at a guaranteed interest rate. It is low risk and offers higher returns than a regular savings account.
How compounding frequency matters
More frequent compounding (quarterly vs yearly) earns interest on previously earned interest sooner, slightly increasing your maturity amount for the same rate and term.
Tips to maximise FD returns
Compare rates across banks, choose cumulative FDs for compounding, ladder multiple FDs for liquidity, and consider longer terms when rates are high to lock in better returns.