Compound Interest Calculator
Grow a lump sum with optional monthly contributions. Free, no sign-up, and it runs in your browser — your files are never uploaded.
How to use
- Enter principal, rate and time
- Choose compounding frequency and contributions
- Read the year-by-year growth
Questions
Do I need an account?
No. Every tool is free to use without signing up.
Is my data uploaded?
No. This tool runs in your browser, so the text and files you use stay on your device.
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