Health & Fitness

BMR, calories, ideal weight, hydration and body fat — evidence-based health calculators with honest guidance.

BMR Calculator

Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation — the calories you burn at complete rest.

Find your daily calorie needs — maintenance, weight loss and weight gain targets from your real activity level.

See your ideal weight by four clinical formulas plus the healthy BMI range — presented as a range, not a single number.

A personalized daily hydration guideline from your weight, exercise and climate — in liters, glasses and ounces.

Estimate body fat percentage with the US Navy tape method — just a few measurements, no equipment.