Compound Interest Calculator — with contributions
Calculate compound interest growth over time. See how your investment grows with regular contributions.
Future value
$19,671.51
Total contributions
$10,000.00
Total interest earned
$9,671.51
How to use Compound Interest Calculator
Enter Your Initial Investment Amount
Locate the 'Principal Amount' field at the top of the calculator. Type your starting investment in dollars (e.g., 10000). This is the base amount that will grow over time.
Input Your Annual Interest Rate
Find the 'Annual Interest Rate (%)' input box. Enter your expected yearly return as a percentage (e.g., 7.5). This rate compounds based on your selected frequency.
Set Your Compounding Frequency
Click the 'Compounding Frequency' dropdown menu and select from: Daily, Monthly, Quarterly, or Annually. This determines how often interest is calculated and added to your principal.
Add Regular Contribution Amounts (Optional)
In the 'Regular Contribution' field, enter how much you'll add periodically (e.g., 500). Select the contribution frequency from the dropdown: Monthly, Quarterly, or Annually.
Specify Your Time Period
Enter the number of years in the 'Time Period' field (e.g., 20). The calculator will project your investment growth across this entire timeframe.
Review Your Results Instantly
Your final amount, total interest earned, and contributions total appear instantly below the input fields. A graph visualization shows your growth trajectory over time.
Frequently Asked Questions
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