Compound Interest Calculator

See how your investments grow with the power of compounding

Principal: 0.00
Total Interest: 0.00
Maturity Value: 0.00

What is Compound Interest?

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Albert Einstein reportedly called it the "eighth wonder of the world".

Compound Interest Formula

A = P × (1 + r/n)^(n × t)

  • A = Final amount
  • P = Principal amount
  • r = Annual interest rate (decimal)
  • n = Number of times interest is compounded per year
  • t = Number of years

Simple vs Compound Interest

Feature Simple Interest Compound Interest
Calculated onPrincipal onlyPrincipal + accumulated interest
GrowthLinearExponential
ReturnsLowerHigher over time
Best forShort-term loansLong-term investments

Frequently Asked Questions

How does compounding frequency affect returns?

The more frequently interest is compounded, the higher the total return. Daily compounding yields slightly more than monthly, which yields more than yearly.

Where does compound interest apply?

Savings accounts, fixed deposits, mutual funds, bonds, and most long-term investments use compound interest.