Methodology

We publish concise methodology notes so users can understand what each estimate represents and what it does not.

Financial calculators

  • Loan and mortgage tools use standard amortization equations based on principal, APR, and term.
  • Investment tools use periodic compounding assumptions with user-provided contribution schedules.
  • Debt payoff tools estimate timeline and interest from balance, APR, and payment behavior.

Health calculators

  • Calorie tools use established equations such as Mifflin-St Jeor where applicable.
  • Outputs are population-level estimates and may differ from clinical or lab measurements.

Converters and utility tools

Conversion calculators use deterministic unit conversion factors. Small differences may occur due to rounding, display precision, or user input formatting.

Limitations

  • Calculator results are informational estimates, not professional advice.
  • Tax rules, lender terms, fees, regional laws, and personal health factors can materially change outcomes.
  • Users should verify critical decisions with qualified professionals.