Compound Interest Calculator
Project investment growth with compound interest. Choose compounding frequency and see total returns.
Runs locally — nothing is uploaded
How to use
- 1
Enter principal
Type the starting investment or savings amount.
- 2
Set rate and time
Enter annual interest rate and number of years.
- 3
Choose compound frequency
Select how often interest is compounded (monthly, daily, etc.).
- 4
View growth
See final balance and total interest earned.
Frequently Asked Questions
A = P × (1 + r/n)^(nt) where n is compounding periods per year.
No. This shows gross compound growth before taxes or fees.
Annual, semiannual, quarterly, monthly, and daily — pick how often interest is added.
Final balance and total interest earned, formatted in USD based on your principal, rate, and years.
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