What we build
We turn standard financial formulas into interactive tools with visible assumptions, charts, and schedules. The calculators are educational estimates, not personalized recommendations or product quotes.
ABOUT COMPOUND PLANNER
Clear math for real financial decisions.
Compound Planner is an independent collection of browser-based calculators for savings, investing, rates, credit cards, and debt payoff.
How your data is handled
Calculations run in your browser. No login is required and financial inputs are not sent to an application backend. Share links can contain the amounts shown on screen, so never enter account or card numbers.
How to report a problem
A useful error report includes the page URL, inputs used, expected result, and observed result. A public feedback address will be added after the site mailbox is configured; no contact address is fabricated here.