Compound Interest Calculator
Project your long-term investment or savings growth using your starting balance, recurring contributions, annual interest rate, compounding frequency, and investment horizon.
Embed this Tool on Your Website
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How to Use Compound Interest Calculator
Compound Interest Calculator Formula / How It Works
The calculator applies the compound interest formula, raising the sum of one plus the periodic rate to the power of total periods, to compute accumulated returns.
For example, let's look at an initial principal of $5,000 at an annual interest rate of 6% compounded monthly for 5 years. By entering these values into the tool, you will get a final balance of $6,744.25 and total accumulated compound interest earnings of $1,744.25 instantly.
Frequently Asked Questions
Compound interest is the interest calculated on the initial principal and also on the accumulated interest of previous periods.
More frequent compounding (e.g. daily vs. annually) results in higher overall returns due to earning interest on interest faster.
It is a shortcut to estimate how long it takes to double an investment: divide 72 by the annual interest rate.
APY (Annual Percentage Yield) reflects the real rate of return on an investment taking into account compound interest.
Yes, given enough time and consistency, compound interest exponentially accelerates savings growth.
Compound Interest Calculator Scenarios and Examples
The examples below show how starting capital, annual interest rate, compounding frequency, and investment horizon interact to produce very different outcomes. Each scenario uses a fixed, worked numerical example so you can follow the calculation step by step.
How Much Will a Lump-Sum Investment Grow Over Time?
See how a single initial deposit of $10,000 at 7% annual rate compounds monthly over 5, 10, 15, and 20 years.
How Compounding Frequency Affects Your Final Balance
Compare the end balance of the same principal at the same rate when compounded annually, quarterly, monthly, and daily.
How Inflation Changes the Future Value of Your Money
Understand the difference between nominal future value and real purchasing power after adjusting for a 3% annual inflation rate.
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