Calculation Standards Policy
Every formula and conversion factor on Fidamen is held to documented standards. This policy outlines the authoritative sources, update commitments, and privacy guarantees that govern all calculations.
Effective: January 2025
Unit Conversions
- All unit conversions are based on NIST Handbook 44 (2025 Edition).
- Conversion factors are updated when NIST publishes revisions; changes are logged in release notes.
- Where NIST does not define a conversion, ISO 80000 serves as the fallback reference.
Financial Formulas
- Tax and financial calculators are updated within 48 hours of IRS Revenue Procedure publications.
- Each affected calculator displays the applicable tax year and the date of last revision.
- Historical versions remain accessible for audit and comparison purposes.
User Privacy
- User inputs are not tracked, stored, or logged.
- Calculations execute entirely in the browser; no input data is transmitted to servers.
- Analytics are limited to page views and general usage patterns—never calculation values.
Reporting Errors
If a calculation appears inconsistent with the stated reference, report it to fidamen@yeahup.net. Confirmed errors are corrected within 24 hours and disclosed in the changelog.