Interest Calculator
Calculate how your money grows with compound interest
Investment Details
1% 5% 10% 15% 20%
5%
1 10 20 30 40 50
10 years
Results
Future Value
$23,219
Total Contributions
$12,400
Interest Earned
$10,819
Investment Growth Over Time
Composition of Final Value
Enter your investment details and click “Calculate” to see results
About Compound Interest
Compound interest is interest calculated on the initial principal and also on the accumulated interest of previous periods.
How Compound Interest Works:
- Principal: The initial amount of money invested
- Interest: Earnings calculated as a percentage of principal
- Compounding: Earning interest on both principal and accumulated interest
- Frequency: How often interest is calculated and added to principal
Compound Interest Formula:
A = P × (1 + r/n)^(n×t)
- A = Future value of investment
- P = Principal investment amount
- r = Annual interest rate (decimal)
- n = Number of compounding periods per year
- t = Time the money is invested for (years)
The Power of Compound Interest:
- Small, regular contributions grow significantly over time
- Higher compounding frequency yields better returns
- Starting early has a dramatic impact on final amount
- Interest earns interest, creating exponential growth