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
See how an investment can grow with regular contributions.
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.
Context & Reference
How it works
Calculators are most useful when their assumptions are clear. Review these details to better understand the logic behind the results.
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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