Health, Nutrition & Bio-Quant Hub
Clinical and athletic physiological engines: BMR, TDEE, macronutrients, body fat percentages, hydration, and pharmacokinetics.
Basal Metabolic Rate (BMR) Calculator
Calculate daily basal calories burned at rest using the clinically validated Mifflin-St Jeor and Harris-Benedict equations.
Total Daily Energy Expenditure (TDEE) Calculator
Calculate total daily calorie expenditure based on BMR and physical activity level for bulking, cutting, or weight maintenance.
Body Mass Index (BMI) & Weight Category Calculator
Calculate BMI, prime BMI, and healthy weight range classifications based on World Health Organization (WHO) and CDC criteria.
US Navy Body Fat Percentage Calculator
Calculate body fat percentage and fat-free lean mass using the official Department of Defense US Navy circumference equations.
Macronutrient Split (Carbs, Protein, Fats) Calculator
Calculate daily macronutrient targets in grams and calories based on fitness goals (cutting, lean bulk, or maintenance).
Calorie Deficit & Fat Loss Timeline Calculator
Calculate daily caloric deficit, weekly fat loss rate, and exact calendar target date to reach your goal body weight.
Ideal Body Weight (IBW) Calculator
Calculate clinical ideal body weight using Devine, Robinson, Miller, and Hamwi pharmacological dosing equations.
Daily Water Intake & Hydration Calculator
Calculate daily water hydration requirements in ounces, liters, and standard glasses based on weight, exercise, and climate.
Target Heart Rate & Training Zones Calculator
Calculate cardiovascular training heart rate zones (Zone 1 Recovery to Zone 5 VO2 Max) using the Karvonen Heart Rate Reserve formula.
One Rep Max (1RM) Calculator
Calculate estimated 1RM and percentage load working sets (95%, 85%, 70%) using Epley, Brzycki, and Lander lifting equations.
Running Pace & Race Finish Time Calculator
Calculate running speed (mph, km/h), splits per mile/km, and projected finish times for 5K, 10K, Half Marathon, and Full Marathon.
VO2 Max & Aerobic Fitness Calculator
Calculate maximal oxygen uptake (VO2 Max in mL/kg/min) and cardio fitness percentile using the Uth-Sørensen-Overgaard-Pedersen resting formula.
Intermittent Fasting & Autophagy Schedule Calculator
Calculate fasting and feeding windows for 16:8, 18:6, 20:4, and OMAD fasting schedules with biological milestones (ketosis, autophagy).
Sleep Cycle & Optimal Bedtime Calculator
Calculate exact bedtimes and wake times aligned with 90-minute ultradian sleep cycles (REM and Slow-Wave Deep Sleep) to eliminate grogginess.
Pregnancy Due Date & Gestational Age Calculator
Calculate Estimated Delivery Date (EDD), current gestational age in weeks and days, and trimester milestones using Naegele's rule.
Ovulation & Fertile Window Calculator
Calculate ovulation peak day, fertile window (5 days prior + ovulation day), and luteal phase timeline based on cycle length.
Blood Alcohol Concentration (BAC) Calculator
Calculate Blood Alcohol Concentration (BAC) and hours until sober using the clinically validated Widmark chemical distribution formula.
Caffeine Half-Life & Sleep Clearance Calculator
Calculate remaining active bloodstream caffeine (mg) and clearance timeline based on CYP1A2 liver enzyme pharmacokinetics.
Keto Net Carbs & Ketogenic Ratio Calculator
Calculate daily net carbohydrate limits, total fiber deductions, and ketogenic macronutrient ratios (fat-to-protein+carb) for nutritional ketosis.
Daily Protein Requirement & Muscle Synthesis Calculator
Calculate optimal daily protein intake in grams and meals based on lean body mass, resistance training goals, and age-related anabolic resistance.
Smoking Cost & Pack-Years Health Calculator
Calculate lifetime financial cost, lost investment compound interest, and clinical pack-years lung cancer risk index from cigarette smoking.
Bench Press Pyramid & Warm-Up Set Calculator
Calculate ascending and descending strength pyramid sets, progressive overload percentages, and plate loading per side for bench press.
Creatine Monohydrate Dosing & Saturation Calculator
Calculate creatine monohydrate loading protocol (20g/day) vs maintenance dosing (5g/day) and intramuscular phosphocreatine saturation timeline.
Total Blood Volume (Nadler) Calculator
Calculate circulating total blood volume (TBV), plasma volume, and red cell mass using the clinical Nadler and Gilcher equations.
Mean Arterial Pressure (MAP) Calculator
Calculate Mean Arterial Pressure (MAP) and organ perfusion adequacy from systolic and diastolic blood pressure readings.