Method
The projection applies a periodic interest rate to a starting balance and adds regular end-of-period contributions.
Finance / browser tool
Compound Interest Calculator
Project compound growth with a clear end-of-period contribution assumption.
Your inputs stay on your device
Project compound growth
live resultUSD
%
USD
Final balance
Total contributions
Interest earned
Estimate only. Regular contributions are made at the end of each month; interest compounds monthly. Currency selection labels amounts only and does not use exchange rates.
Useful context
How it works
Use the calculator first, then scan the details below when you want more context about the inputs, result, or assumptions.
How to use it
Enter the starting amount, contribution, rate, term, and compounding frequency, then inspect the projected balance.
Understand the result
Final balance includes contributions and growth; interest earned is the amount above total contributions.
Example
Regular monthly deposits can produce a larger projected balance than a lump sum with the same total deposits.
Notes
This is a mathematical projection, not a promise of investment performance. Rates and contributions are assumed constant.
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