BMI, calories, sleep cycles, and fitness calculators
Calculate your Body Mass Index (BMI) and Basal Metabolic Rate (BMR) with health insights
Estimate daily calorie needs and macronutrient distribution for your fitness goals
Calculate your Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle, plus daily TDEE for any activity level
Calculate body fat percentage using the US Navy method — metric and imperial, with fat mass and lean mass breakdown
Estimate your blood alcohol content using the Widmark formula — based on weight, gender, drinks consumed, and time
Calculate your pregnancy due date using LMP or conception date with current week, trimester, and Naegele's rule
Estimate ovulation date, fertile window, and most likely conception window from your last menstrual period and cycle length
Find the best time to wake up or go to sleep based on 90-minute sleep cycles to wake up refreshed
Calculate your pregnancy due date, current week, and trimester based on last menstrual period or conception date
Calculate your daily protein, carbs, and fat targets based on your body stats, activity level, and fitness goal
Calculate your daily protein needs based on body weight, activity, and goals — fat loss, muscle gain, endurance, elderly, pregnancy — with food equivalents
Compare your grip strength to age and sex norms with percentile ranking, z-score, sarcopenia/frailty screening, and hand asymmetry analysis
Classify body shape (hourglass, pear, apple, rectangle, V-shape) from anthropometric measurements — WHR, WHtR, ABSI, US Navy body fat, and health risk indicators
Estimate your 1RM for bench, squat, deadlift, and overhead press using 7 prediction formulas (Epley, Brzycki, Lombardi, Mayhew, Wathan, Lander, O'Conner) with training load tables and strength classification
Calculate your Total Daily Energy Expenditure and BMR using Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and Cunningham formulas — with calorie goals for cut/bulk/recomp and macro splits
Calculate your daily water intake needs based on weight, activity level, and climate
Estimate your VO2 max (maximal oxygen uptake) using the Rockport Walk, Cooper Run, 1.5-mile, or non-exercise method
Calculate your max heart rate and 5 training zones by age — fat burn, cardio, and peak zones with target BPM ranges
16:8, 18:6, 20:4, OMAD countdown timer with fasting window tracking and next window planner
Calculate your ovulation date, fertile window, and next period based on your cycle length