How to Use the Compound Interest Visualizer

Enter your starting principal — the amount you're investing today.
Set the annual interest rate as a percentage.
Choose the compounding frequency: annually, monthly, weekly, or daily.
Set the investment period in years.
Optionally add monthly contributions to see the effect of regular deposits.
The chart updates in real time to show your total balance, principal, and earned interest year by year.

About This Tool

This compound interest visualizer functions as an investment growth calculator, savings calculator with contributions, and retirement savings estimator. Input your principal, interest rate, time horizon, and optional regular deposits to see exactly how your balance grows year by year.

Compare daily, monthly, quarterly, and annual compounding, or contrast compound interest vs. simple interest. Whether you're modeling a savings account, CD, index fund, or long-term investment portfolio, all calculations run instantly in your browser.