Health and Fitness Calculators
Explore practical health and fitness calculators for body mass index, daily energy needs, body-fat estimates, hydration, macronutrients, reference weight, and pregnancy due-date planning. These tools make the underlying arithmetic clearer, but they are educational estimates rather than diagnoses. Use them to prepare useful questions for a qualified clinician, dietitian, trainer, or prenatal care team, especially when health conditions, medication, pregnancy, or a clinical goal are involved.
BMI Calculator
Calculate BMI from height and weight, then see the standard adult BMI range.
Calorie and TDEE Calculator
Estimate basal metabolic rate and daily calorie needs using your activity level.
Body Fat Percentage Calculator
Estimate body fat percentage from tape measurements using the US Navy method.
Ideal Weight Calculator
Estimate a reference weight using the Devine formula and your height.
Pregnancy Due Date Calculator
Estimate a due date from the first day of the last menstrual period.
BMR Calculator
Estimate basal metabolic rate with the Mifflin-St Jeor formula.
Water Intake Calculator
Estimate a practical daily water target from body weight and activity time.
Macro Nutrient Calculator
Turn a calorie target into carbohydrate, protein, and fat gram targets.