Compound Interest Calculator
Calculate compound interest with year-by-year growth breakdown
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Growth Chart
Year-by-Year Breakdown
| Year | Starting Balance | Contributions | Interest Earned | Ending Balance |
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About Compound Interest Calculator
See exactly how your money grows over time with compound interest. Compare daily, monthly, and yearly compounding with detailed breakdown tables.
- Supports daily, monthly, quarterly, and annual compounding
- Year-by-year growth breakdown table
- Visualizes how compounding frequency impacts returns
- Shows both future value and total interest earned
- Handles additional monthly contributions
Everything runs in your browser — your data never leaves your device.
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How to Use Compound Interest Calculator
- Enter the principal amount and annual interest rate
- Choose compounding frequency (monthly, quarterly, etc.)
- Set the time period and view the year-by-year growth table
Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. It makes your money grow faster than simple interest.
How does compounding frequency affect returns?
More frequent compounding (e.g., daily vs. annually) yields slightly higher returns because interest is calculated and added to the principal more often.
What formula is used?
A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounds per year, and t is time in years.
