Compound Interest Calculator
Calculate compound interest for savings, investments, or loans with compounding frequencies and monthly contribution options.
Compound Savings Widget
Calculation Result
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About Compound Interest Calculator
The Compound Interest Calculator helps you plan your investments and savings by simulating interest accumulation over time. It models how your initial principal and recurring monthly contributions grow when interest compounds monthly, quarterly, semi-annually, or annually.
Compound Interest Formula:
A = P * (1 + r/n)^(n*t) + PMT * [((1 + r/n)^(n*t) - 1) / (r/n)]
Where A is the total end value, P is the principal, r is the annual rate, n is compound frequency per year, t is years, and PMT is the monthly contribution.
Frequently Asked Questions
Q: What is compound interest?
Compound interest is interest calculated on the initial principal, which also includes all of the accumulated interest from previous periods on a deposit or loan. It is essentially 'interest on interest'.
Q: What compound frequencies can I use?
This calculator supports monthly, quarterly, semi-annually, and annually compounding frequencies to model different types of investment accounts.