Methodology & data sources
Transparency is the core of our E-E-A-T: this page documents where our data comes from, how often it is refreshed, and the formulas behind every calculation.
Data sources
| Source | Refresh cadence | License |
|---|---|---|
| Standard amortization formulas (financial mathematics) | none | Public formula |
How calculations work
Calculators run entirely in your browser using standard, published formulas (shown on each tool page). We do not store your inputs.
Limitations
Figures are estimates for general information and may lag the underlying source or contain errors. Always verify against the primary source before relying on them. See our disclaimer.