Money
Compound Interest Calculator
See how your money grows with compounding.
Result
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Fill in the form to see your answer here.
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About this tool
Compound interest is calculated on the principal plus previously earned interest. Enter the principal, annual rate, time period and how often it compounds to see the final amount and total interest earned.
Frequently asked questions
What is the compound interest formula?
A = P × (1 + r/n)^(n×t), where P is principal, r is the annual rate as a decimal, n is the compounding frequency per year, and t is time in years.
What compounding frequency should I choose?
Use what your bank or investment states — commonly yearly, half-yearly, quarterly or monthly. More frequent compounding gives a slightly higher final amount at the same stated rate.
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