TDEE & Calorie Deficit Calculator
Calculate Total Daily Energy Expenditure (TDEE), basal metabolic rate (BMR), and custom macro splits for fat loss or muscle gain.
BMI & Ideal Body Weight Calculator
Calculate Body Mass Index (BMI), World Health Organization (WHO) weight status classification, and healthy ideal weight range.
Body Fat Percentage Calculator (US Navy)
Estimate your body fat percentage, lean body mass, and fat mass using tape measurements via the official US Navy circumference method.
Daily Water Intake Calculator
Calculate optimal daily water consumption (liters, ounces, glasses) based on body weight, daily exercise duration, and climate conditions.
Macro Nutrient & Calorie Ratio Calculator
Calculate target daily grams of protein, carbohydrates, and dietary fats based on your total caloric target and fitness goals.
Basal Metabolic Rate (BMR) Calculator
Calculate the minimum calories burned at rest using evidence-informed Mifflin-St Jeor and revised Harris-Benedict formulas.
Target Heart Rate & Training Zones Calculator
Calculate maximum heart rate and 5 aerobic cardiovascular training zones using the Tanaka formula and Karvonen Heart Rate Reserve method.
Running Pace & Race Time Calculator
Calculate running pace per kilometer or mile, projected race finish times (5K, 10K, Half, Marathon), and average speed in km/h or mph.
Ideal Body Weight (IBW) Clinical Calculator
Compare your ideal body weight targets across 4 clinical formulas: Devine, Robinson, Miller, and Hamwi medical guidelines.
Body Surface Area (BSA) Medical Calculator
Calculate human body surface area in square meters (m²) using Mosteller, Du Bois, and Haycock formulas for chemotherapy and physiological dosing.
Pregnancy Due Date & Trimester Milestone Calculator
Calculate your estimated delivery due date (EDD), gestational age in weeks & days, and trimester calendar milestones using Naegele's clinical rule.
Sleep Cycle & REM Bedtime Calculator
Calculate optimal sleep and wake-up times based on 90-minute REM sleep cycles to avoid grogginess and sleep inertia.
Intermittent Fasting & Autophagy Schedule Calculator
Calculate daily eating and fasting windows (16:8, 18:6, 20:4, OMAD, Circadian) with metabolic fasting stages, ketosis timeline, and cellular autophagy windows.