Frequently Asked Questions

No. Every public calculator runs deterministically inside your own browser runtime. Values only leave your device if you sign into an optional workspace account and explicitly click Save Calculation.

Financial engines follow standard institutional amortization and compounding identities, while health modules apply published peer-reviewed equations such as Mifflin-St Jeor, Harris-Benedict, and Boer lean mass approximations.

Yes. Use the dedicated Comparison Hub at /compare or toggle Side-by-Side Compare inside individual calculators to test 15-year vs 30-year loans, extra principal payments, or competing return assumptions simultaneously.

All outputs render in monospaced tabular numerals to prevent digit shift during slider adjustments. Core tools include print-ready summary sheets, shareable input permalinks, and formula variable glossaries.

Yes. All 163+ calculators across finance, fitness & health, math, and everyday utilities are free to run unlimited times with no paywalls or forced sign-up prompts.

Yes. Homepage hero copy, default live workbench mode, featured calculator picks, FAQs, blog guides, menus, and legal pages are managed cleanly inside the Admin CMS with instant cache revalidation.