Free Health & Medical Calculators
Evidence-based physiological calculators to help you monitor weight, blood pressure, protein requirements, net carbs, fertility, metabolism, and daily wellness.
Women's Health
Ovulation & Period Cycle Calculator
Predict your most fertile days and estimated ovulation date to maximize conception chances or track cycle regularity.
Pregnancy Due Date & Trimester Calculator
Calculate your baby's estimated due date using Naegele's rule and track your pregnancy progression by trimester.
Fitness & Weight
BMI Calculator (Body Mass Index)
Calculate your Body Mass Index (BMI) to understand your weight category and overall body composition risk.
TDEE & Calorie Deficit Calculator
Find your daily energy expenditure and calculate target calories for healthy weight loss (deficit) or muscle growth (surplus).
Macronutrient (Macro) Calculator
Break down your daily calorie target into exact gram targets for Protein (4 kcal/g), Carbs (4 kcal/g), and Healthy Fats (9 kcal/g).
Ideal Body Weight (IBW) Calculator
Compare 5 validated medical formulas to determine your optimal target weight range for longevity and health.
Waist-to-Hip Ratio (WHR) Calculator
A superior predictor of heart disease and diabetes compared to BMI alone by measuring abdominal fat distribution.
Body Fat Percentage Calculator (US Navy Method)
Calculate body fat percentage accurately using simple tape measurements of your neck, waist, and hips.
BMR Calculator (Basal Metabolic Rate)
Understand the foundational calories your body requires to support vital organ function at rest.
Steps to Calories & Distance Burned Calculator
Calculate how many calories you burn from walking and find the exact distance covered based on your step count and pace.
Nutrition & Diet
Daily Protein Intake & Muscle Calculator
Determine your ideal daily protein targets in grams, per-meal distribution, and amino acid threshold based on your fitness goals.
Net Carbs & Keto Macro Calculator
Calculate impactful net carbohydrates to maintain nutritional ketosis or manage glycemic blood sugar response.
Heart & Metabolic
Blood Sugar Converter (mg/dL ↔ mmol/L)
Instantly convert blood glucose readings between US (mg/dL) and International (mmol/L) units with instant clinical status evaluation.
Blood Pressure Category Checker (AHA Guidelines)
Assess your cardiovascular health by evaluating systolic and diastolic blood pressure against American Heart Association standards.
Daily Wellness
Daily Water Intake Calculator
Discover your personalized daily hydration requirement in liters, milliliters, and 8-ounce glasses.
Sleep Cycle & Optimal Bedtime Calculator
Calculate optimal sleep and wake times based on natural 90-minute sleep cycles and 15 minutes average time to fall asleep.
Intermittent Fasting Timer & Schedule Calculator
Select your fasting protocol and starting time to visualize your eating window, fat-burning zone, and autophagy schedule.
Biological Age & Longevity Calculator
Assess how fast your body is aging relative to your calendar years and receive practical longevity recommendations.
Stress & Cortisol Assessment Test (PSS-10)
Evaluate your emotional and physiological stress load using the scientifically validated Perceived Stress Scale.
Heart & Cardio
Target Heart Rate & Training Zones Calculator
Optimize your cardio workouts by training in the right heart rate zone for maximum fat loss or cardiovascular endurance.