💰Compound Interest Calculator

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Compute future value with compounding, periodic contributions, and effective annual rate (EAR).

⚙️Inputs
Initial principal
Annual rate (%)
Years
Compound frequency
Contribution per period
📊Results
Future value
$18,193.97
Total contributed
$10,000.00
Total interest
$8,193.97
Effective annual rate (EAR)
6.17%
Periods
120
📋Preview (first 12 periods)
#InterestContributionBalance
1$50.00$0.00$10,050.00
2$50.25$0.00$10,100.25
3$50.50$0.00$10,150.75
4$50.75$0.00$10,201.51
5$51.01$0.00$10,252.51
6$51.26$0.00$10,303.78
7$51.52$0.00$10,355.29
8$51.78$0.00$10,407.07
9$52.04$0.00$10,459.11
10$52.30$0.00$10,511.40
11$52.56$0.00$10,563.96
12$52.82$0.00$10,616.78
Contributions are per compounding period selected above.
How this tool works
1
Enter investment details
Input the initial principal, annual interest rate, number of years, and compound frequency.
2
Add contributions (optional)
Enter periodic contributions and choose whether they occur at the beginning or end of each period.
3
View results
See the future value, total contributed, total interest earned, effective annual rate, and number of periods.
4
Review preview
Examine the first 12 periods of the compound interest schedule showing interest, contributions, and balance.