Free interactive tool
Body Compass
Estimate BMI, maintenance energy, and a basic protein reference without treating any number as a verdict.
Private by design: nothing is stored or sentHow it works
Energy uses the female Mifflin-St Jeor equation and an activity multiplier, then shows a 10 percent range around the estimate. The protein figure uses the US adult reference baseline of 0.8 g/kg. These are general estimates, not personalized medical or nutrition advice.
Sources: CDC on BMI as a screening measure, National Academies protein reference. Speak with a qualified professional if you have kidney disease, an eating disorder, unintentional weight change, or a clinical nutrition concern.