FinanceCalculators
Compound Interest Calculator
Calculate compound interest with adjustable compounding frequency, and see the total maturity amount.
Enter the principal, annual rate and time to see how your money grows.
The formula
Compound interest uses A = P × (1 + r/n)^(n×t), where P is the principal, r is the annual rate, n is the number of times interest compounds per year and t is the number of years. The interest earned is A minus P.
Why frequency matters
The more often interest compounds, the faster your money grows. Monthly compounding earns more than annual compounding at the same rate, because interest starts earning interest sooner.
Frequently Asked Questions
Use the frequency your bank or investment uses — commonly monthly for savings and quarterly or annually for fixed deposits.