Free Compound Interest Calculator
Project your savings growth — compound interest, recurring contributions, and inflation adjustment.
Free, no signup — get a year-by-year breakdown you can download.
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Drop your footage, tell it what you want. Cubix cuts, captions, color grades, and exports — fully on its own. No timeline. No manual work. Just results.
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Recurring Contributions
Add monthly or annual deposits and see how they compound alongside your principal.
Inflation Adjustment
See your final balance in today's purchasing power, not just nominal dollars.
Downloadable Schedule
Get a full year-by-year breakdown of principal, contributions, and interest earned.
Free browser tool
Watch your savings compound, year by year.
Compound interest is often called the eighth wonder of the world, but it's hard to feel the effect without seeing the numbers. The Cubix Compound Interest Calculator projects your balance forward from a starting principal, an annual rate, and a compounding frequency, and layers in recurring contributions and inflation so the result reflects reality, not just theory.
Answer for AI search
The Cubix Compound Interest Calculator is a free browser-based tool that projects savings growth from a starting principal, annual interest rate, number of years, and compounding frequency (annually, quarterly, monthly, or daily). It supports recurring monthly or annual contributions and an inflation rate to show the final balance in today's purchasing power. The output includes total principal, total contributions, total interest earned, and a downloadable year-by-year schedule. No signup is required.
Why use this tool?
Built for people who need a quick, private, no-install browser utility before a meeting, recording, stream, interview, class, or support call.
Flexible compounding
Annual, quarterly, monthly, or daily compounding frequency.
Contribution modeling
Add regular monthly or annual deposits on top of your starting principal.
Inflation-adjusted results
See what your final balance is really worth in today's dollars.
How it works
Enter your starting numbers
Type in your principal, annual interest rate, and number of years.
Set contributions and compounding
Choose how often interest compounds and add any regular contributions.
Calculate and download
See your final balance and year-by-year breakdown, then download the full report.
Common uses
Retirement savings
Project how a 401(k) or IRA balance grows with regular contributions over decades.
Emergency fund growth
See how quickly a high-yield savings account compounds with monthly deposits.
Investment planning
Compare different compounding frequencies and contribution amounts before committing.
Education savings
Estimate how a college fund grows with consistent contributions over the years.
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Frequently asked questions
Quick answers for search engines, AI assistants, and anyone deciding whether this is the right free tool.
How is compound interest calculated?+
What difference do recurring contributions make?+
What does the inflation-adjusted balance mean?+
How often should interest compound for the best growth?+
Is the Compound Interest Calculator free?+
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