Calculate how your investment grows with compound interest over time. Enter your principal amount, annual interest rate, time period, and compounding frequency to see your final balance and interest earned.
Enter Your Measurements
Results
Final Amount
16,470.09
$
Interest Earned
6,470.09
$
Formula
How to Use This Calculator
How to Use
- 1
Enter your initial investment amount (principal).
- 2
Enter the annual interest rate offered by your account or investment.
- 3
Enter the time period in years.
- 4
Select how often interest compounds (monthly is most common).
- 5
View your final balance and total interest earned.
Frequently Asked Questions
Frequently Asked Questions
What is compound interest?
How often should interest compound?
How long does it take to double my money?
In-Depth Guides
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About This Calculator
This calculator uses the formula: A = P(1 + r/n)^(nt), where A = final amount, P = principal, r = annual rate, n = compounds per year, t = years. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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