Finance Calculators
Compound Interest Calculator
See how your savings grow with compound interest, using yearly, quarterly or monthly compounding.
About the Compound Interest Calculator
Compound interest is often called the eighth wonder of the world because you earn interest on your interest. This calculator shows how a lump sum grows over time at a given rate and compounding frequency.
Enter your principal, annual rate, time and compounding period to see the maturity value, total interest earned and a year-by-year breakdown.
How to use the Compound Interest Calculator
- Enter the principal amount.
- Enter the annual rate.
- Set the time in years and the compounding frequency.
- Click Calculate.
How the calculation works
A = P × (1 + r/n)^(n×t)
P = principal · r = annual rate · n = times/year · t = years
P = principal · r = annual rate · n = times/year · t = years
Example
₹1,00,000 at 8% compounded quarterly for 10 years grows to about ₹2,20,800.
Frequently asked questions
Interest calculated on both the original principal and the accumulated interest from previous periods.
More frequent compounding (monthly vs yearly) produces slightly higher returns for the same annual rate.
Simple interest is earned only on the principal, while compound interest grows on principal plus prior interest.
Yes, set a longer time period to see how dramatically compounding builds wealth over decades.