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Tools

Free calculators, no sign-up, nothing tracked beyond the site's normal analytics. Every tool publishes its methodology — the formula, the assumptions, and what the result does not tell you — because a number you can't interrogate is a number you shouldn't trust.

• Compound Interest Calculator

  Project an investment with monthly contributions — final balance, growth vs. contributions, year-by-year table, and an honest list of what the projection ignores.