Body composition, energy expenditure, and reproductive metrics.
BMI, BMR, TDEE, body fat percentage, due date, ovulation window. Every calculator tagged health uses well-established clinical formulas and runs in your browser. They're educational starting points, not clinical advice.
Calculate Body Mass Index from height and weight. Shows WHO classification. 100% in-browser.
Estimate Basal Metabolic Rate using the Mifflin-St Jeor equation. Calories you burn at rest.
Estimate Total Daily Energy Expenditure from BMR and activity level. Plus maintenance and calorie-target suggestions.
Compare four published methods — Hamwi, Devine, Robinson, Miller — side by side.
Estimate body fat % using the US Navy (Hodgdon-Beckett) circumference method.
Estimate due date, gestational age, and trimester from your last menstrual period (Naegele's rule).
Find your expected ovulation date and fertile window based on your last period and cycle length.
Project your next six menstrual cycles on a calendar grid from a single last-period date.