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Compound Interest Calculator
Calculate compound interest on savings or investments. Choose compounding frequency and growth duration.
How to use this tool
- Set principal, annual rate, duration, and compounding frequency.
- Add recurring monthly contributions and optional inflation assumptions.
- Review projection summaries and export CSV/JSON outputs.
Projection planning
- Compare multiple scenarios by adjusting rate, contribution, and frequency values.
- Use year-by-year rows to track how interest compounds over time.
- Inflation-adjusted value helps estimate real purchasing power.
Usage caveats
- Outputs are deterministic projections, not market forecasts.
- Taxes, investment fees, and volatility are not included.
- Use scenario ranges rather than single-point assumptions for planning.
FAQ
- Is this financial advice?
- No. It is a planning calculator for educational and scenario analysis purposes.
- Are recurring contributions supported?
- Yes. Monthly contributions are incorporated across compounding periods.
- Can I export the projection table?
- Yes. Download yearly projection rows as CSV or full report data as JSON.
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