Compound Interest Calculator

Calculate the growth of your investment over time.

R$
R$
% yearly
years

How to use this calculator

  1. Initial Investment: Enter the amount of money you are starting with today.
  2. Monthly Contribution: Input how much you plan to save every month.
  3. Interest Rate: Provide the expected annual or monthly return rate.
  4. Time Period: Tell us how long you plan to keep the money invested.

What is Compound Interest?

Compound interest is calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, it grows exponentially — the interest itself earns more interest.

A = P(1 + r/n)^(nt)
The classic formula for compound interest.