Compound Interest Calculator
See how your savings and investments grow over time with the power of compound interest. Free, private, and instantly shareable.
Calculate Compound Interest
Enter your details above and click Calculate to see your results
How It Works
Enter Your Details
Input your initial deposit, interest rate, compounding frequency, and any regular contributions you plan to make.
Click Calculate
The calculator uses the standard compound interest formula to project your balance year by year, accounting for your contribution schedule.
Review & Export
See your results as summary cards, an interactive growth chart, and a detailed year-by-year table. Export everything as a PDF.
Why Use This Calculator
Accurate Results
Uses standard compound interest formulas trusted by financial institutions worldwide.
Instant Calculations
Get results in milliseconds. Adjust inputs and see changes immediately.
Completely Private
All calculations happen in your browser. No data is sent to any server.
Export to PDF
Download a print-friendly PDF of your results to keep or share.
Learn About Compound Interest
What is Compound Interest?
A beginner-friendly explanation with real examples.
Compound vs Simple Interest
Which grows faster and why it matters.
The Rule of 72
Quick mental math to estimate doubling time.
Compounding Frequency Compared
Daily, monthly, or annual — does it matter?
Compound Interest & Retirement
How starting early builds serious wealth.
This calculator provides estimates for informational purposes only. Results do not constitute professional financial advice. Always consult a qualified financial adviser before making investment decisions.