Compound Interest Calculator
Discover how small, consistent contributions compound into serious wealth over time.
About the Compound Interest Calculator
This compound interest calculator empowers savers and investors to project long-term growth on their money. Input your initial investment, regular contribution amount, annual interest rate, compounding frequency from daily to annually, and investment horizon up to 50 years. The Calculator sheet instantly displays your future value, total contributions, and total interest earned, while the Growth Table sheet provides a year-by-year breakdown of beginning balance, contributions, interest, and ending balance across 30 years. An area chart visualizes contributions versus interest earned over time, and conditional formatting highlights when interest surpasses contributions. Planning for the long haul? Pair this with the Retirement Calculator to set a concrete savings goal.
Compound Interest Calculator Features
- Supports daily, monthly, quarterly, and annual compounding frequencies
- Year-by-year growth table spanning up to 30 years
- Area chart visualizing contributions versus interest earned
- Future value, total contributions, and total interest summary
- Conditional formatting highlights when interest surpasses contributions
How to Use This Compound Interest Calculator in Excel
- 1
Enter initial investment
Input your starting balance and regular contribution amount on the Calculator sheet.
- 2
Set rate and frequency
Enter your expected annual interest rate and select a compounding frequency from daily to annually.
- 3
Choose time horizon
Set your investment horizon in years to see the projected future value, total contributions, and interest earned.
- 4
Explore growth table
Review the year-by-year Growth Table and area chart to see how your money compounds over time.
Compound Interest Calculator FAQ
- What compounding frequencies are supported?
- The calculator supports daily, monthly, quarterly, semi-annual, and annual compounding. Select your preferred frequency from a dropdown and all projections update automatically.
- Can I model regular contributions?
- Yes, enter a recurring contribution amount and the calculator factors it into every compounding period, showing how regular deposits accelerate growth.
- How long of an investment horizon can I project?
- You can model growth for up to 50 years on the Calculator sheet, with the Growth Table providing detailed year-by-year data for up to 30 years.
