What these calculators are
They apply published formulas to numbers you enter: a due date from the last period, a BMI from height and weight, a calorie estimate from age and activity, a body-fat estimate from tape measurements. Each page shows the method and the sources it was checked against.
None of them diagnoses anything. A BMI is not a body-fat measurement, a due date is an estimate rather than a scan, and a calorie equation is a population average. The pages say so, because a number without its limits is easy to misread.
How the pages are checked
Every health page here is a formula page: primary sources, a visible method, a worked example and an explicit “what this calculator does not do” section. The byline reads “Reviewed by the CalculateFox editorial team”, not a borrowed clinician’s name. Pages that interpret a result, give personal advice or use current clinical guidance would need a named, qualified reviewer and are not published under this standard.
If a formula or a source is wrong, write to hello@calculatefox.com with the page and the input. A correction is made on the page, not in a footnote.