Site questions, answered
Are the calculators accurate?
Each tool uses formulas published by authoritative bodies (CDC, WHO, NIH, ACSM, IRS) and states its method, assumptions, and limitations on the page. Results are educational estimates.
Is my data private?
Yes, completely. Calculations run in your browser. Nothing you enter is stored or transmitted.
Why are results sometimes different from other sites?
Different formulas and population references produce different estimates. We state exactly which method each tool uses.
Who reviews the health calculators?
Health and nutrition tools follow our editorial and calculation standards, with formula and threshold reviews recorded on every page.
Can I use these calculators for medical decisions?
No. Use them to understand your numbers, then discuss decisions with a qualified professional.
How do I report an error?
Use the contact page, we fix formula issues fast.