Health Calculators
Practical tools to estimate body and energy metrics. Use these as guidance, not diagnosis. Get personalized insights to support your fitness journey.
BMI
Body mass index from weight and height
BMR
Basal metabolic rate by Mifflin-St Jeor
TDEE
Daily energy needs from activity level
Body Fat
US Navy body fat percentage estimate
Daily Requirements
Calories, macros, hydration, and key micronutrients
Calculate My Plate
Autocomplete your meals and compare nutrient totals with TDEE
Why Calculate?
Understanding your personal metrics is the foundation of health and fitness success. These calculators use scientifically-backed formulas (Mifflin-St Jeor for BMR, US Navy method for body fat) to give you baseline targets.
Build Your Profile
Use these calculations to populate your HOW profile with accurate personal data. Your profile then powers all personalized recommendations across the platform.
Track Progress
Recalculate periodically as your body changes. Monitor how your calculations shift as you progress toward your fitness goals.