Health Tools

Health tools that compute the standard general-population estimates clinicians and coaches reach for: Body Mass Index against CDC adult and pediatric cutoffs, Basal Metabolic Rate using Mifflin-St Jeor, revised Harris-Benedict, or Katch-McArdle (the right choice depends on whether you know your body-fat percentage), total daily energy expenditure adjusted for activity level, macronutrient split for a given calorie target, sleep cycle timing, fertility windows, pregnancy due dates, and a blood alcohol estimate to help you decide when not to drive. Every result is an estimate, not a diagnosis, and the tools say so on the page; for anything that affects a real medical decision, the right answer is to talk to a clinician. The most common assumption that gets people in trouble is treating BMI as a fitness verdict; it is a population-level screening tool that does not distinguish lean mass from fat mass and routinely misclassifies muscular adults and the elderly, which is why the body composition tools here surface the caveats alongside the number. If you are new to the category, start with the body-mass and metabolic-rate tools together to establish baseline numbers, the calorie targets if you have a weight-change goal, and the sleep timing tools if you wake up groggy on a consistent schedule. The pregnancy and ovulation tools are written for general planning, not for clinical work.

10 tools available