About lumpsum.in

lumpsum.in provides accurate, transparent financial calculators for India. All computations run entirely in your browser—no personal data leaves your device.

How calculations are done

Formulas are implemented as pure TypeScript functions under lib/calc. Each calculator exposes both totals and time-series suitable for charts and CSV export.

Disclaimer

These tools are for education only and do not constitute investment advice. Returns are market dependent and not guaranteed. Consult a qualified advisor before making decisions.

Open source

Contributions are welcome. File issues, suggest improvements, or add new calculators.