Fitness & Health Calculators

Calculate your Body Mass Index (BMI), health category, and healthy weight range. Supports metric and US imperial units.

Calculate daily calories for weight maintenance, mild fat loss, extreme fat loss, or muscle gain using scientific Mifflin-St Jeor & Harris-Benedict formulas.

Calculate your Basal Metabolic Rate (BMR) to discover how many calories your body burns at rest to sustain vital bodily functions.

Calculate your Total Daily Energy Expenditure (TDEE) to learn exactly how many calories you burn per day including exercise, NEAT, and TEF.

Find your healthy and ideal body weight range based on scientific clinical formulas (Devine, Robinson, Miller, and Hamwi).

Estimate your body fat percentage, fat mass, and lean mass using the standardized US Navy circumference tape measurement formula.

Calculate your estimated pregnancy due date, current gestational week, and trimester milestones based on your last menstrual period (LMP) or conception date.

Calculate your maximum heart rate (MHR) and 5 cardiovascular exercise training zones (Fat Burn, Aerobic, Anaerobic, VO2 Max) using the Karvonen formula.

Calculate your estimated one-rep maximum (1RM) for strength lifts using the Brzycki, Epley, and Lombardi formulas from any submaximal set.

Calculate running pace, race split times, and speed for 5K, 10K, Half Marathon, and Full Marathon distances.

Calculate your daily macronutrient ratio splits (grams of protein, carbohydrates, and healthy fats) tailored to fat loss, maintenance, or muscle growth.

Calculate your target healthy weight range based on your exact height and WHO Body Mass Index boundaries (18.5 to 24.9).

Assess excess body weight above healthy clinical thresholds and compute realistic weight reduction milestones and timelines.

Clinical malnutrition screening tool based on DSM-5 diagnostic criteria evaluating severe, moderate, and mild anorexia nervosa underweight thresholds.

Calculate US Army body fat percentage and test compliance with Army Regulation (AR) 600-9 screening tables.

Calculate your Lean Body Mass (LBM) and fat-free weight in pounds or kilograms using scientific Boer, James, and Hume clinical formulas.

Calculate total body surface area (BSA in m²) using the Mosteller and Du Bois formulas for clinical oncology, chemotherapy, and renal dosing.

Calculate calories burned during workouts, running, cycling, swimming, and daily tasks using scientifically validated MET (Metabolic Equivalent) scores.

Calculate your fertile window, peak ovulation day, and next menstrual period based on your last menstrual cycle and average cycle length.

Track your gestational progress week by week, discover fetal development milestones, and calculate days until delivery.

Calculate your optimal daily protein requirement in grams based on your body weight, physical activity level, and athletic goals.

Calculate your estimated Blood Alcohol Concentration (BAC) and time until legal sobriety using the scientific Widmark formula.

Calculate estimated Glomerular Filtration Rate (eGFR) and Chronic Kidney Disease (CKD) staging using the race-free 2021 CKD-EPI creatinine equation.

Calculate optimal bedtimes or wake-up times based on natural 90-minute REM sleep cycles to avoid waking up groggy.

Calculate your World Handicap System (WHS) and USGA golf score differential based on adjusted gross score, course rating, and slope rating.

Identify your predominant somatotype body classification (Ectomorph, Mesomorph, or Endomorph) from frame size, wrist circumference, and metabolism.

Calculate your female body shape classification based on bust, waist, high hip, and low hip circumference measurements.

Calculate daily dietary fat requirements in grams and calories based on daily caloric expenditure and diet style (Standard, Mediterranean, Keto, Low-Fat).

Calculate daily carbohydrate requirements in grams based on activity level, body weight, and training goals (Endurance, Strength, Keto, Weight Loss).

Calculate the most likely date of conception, ovulation day, and intercourse fertile window based on your last menstrual period (LMP) or estimated due date.

Forecast future menstrual cycle dates, track period duration, and predict your next 3 menstrual periods.

Calculate recommended pregnancy weight gain targets based on pre-pregnancy BMI and gestational week, following Institute of Medicine (IOM) clinical guidelines.

Calculate nutritional food point values from calories, saturated fat, sugar, and protein content.