About CompoundCalc
Our Mission
At CompoundCalc, we believe everyone should have access to powerful financial planning tools — for free. Our compound interest calculator lets you visualize how investments grow over time, compare scenarios, and make informed decisions about your financial future.
What Our Calculator Does
- Accurate compound interest calculations — supports daily, weekly, monthly, quarterly, semi-annual, and annual compounding
- Periodic contributions — model regular investments on any schedule
- Interactive growth charts — visualize your balance, contributions, and interest over time
- Principal vs interest breakdown — see exactly how much comes from savings vs market returns
- Year-by-year amortization table — detailed breakdown for every year of your investment
- Advanced options — account for inflation and capital gains tax
- Export capabilities — download results as CSV or screenshot for your records
Why We Built This
Compound interest is one of the most powerful concepts in personal finance — yet many people don't fully grasp its impact. As Albert Einstein reportedly said, it's "the eighth wonder of the world." Our goal is to make compounding visible, understandable, and actionable for everyone.
Whether you're planning for retirement, saving for college, or just learning about investing, our calculator gives you the clarity you need — with no sign-ups, no fees, and no ads cluttering your experience.
Privacy First
All calculations happen directly in your browser. We don't store, collect, or share any of the numbers you enter. See our Privacy Policy for full details.
Contact Us
Have questions, suggestions, or found a bug? We'd love to hear from you. Visit our Contact page to get in touch.