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Health Calculators

Free health, fitness, nutrition, and medical calculators. BMI, calorie needs, pregnancy due dates, protein intake, heart rate zones, and more — all free, no signup.

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All 69 Health Calculators
Health
Alcohol Units Calculator
Free online Alcohol Units Calculator — instant results, no signup required.
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Apri Score Liver Calculator
Apri Score Liver medical calculator for health assessment and monitoring.
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Health
Baby Formula Calculator
Calculate how much formula your baby needs per day and per feeding based on weight and age…
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Baby Growth Percentile Calculator
Free online Baby Growth Percentile Calculator — instant results, no signup required.
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Health
Baby Growth Percentile Calculator
Calculate baby's growth percentiles for weight, length, and head circumference. Based on W…
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Health
Baby Name Numerology Calculator
Calculate numerology life path number and destiny number for baby names. Discover the nume…
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Health
Baby Sleep Schedule Calculator
Calculate recommended sleep schedule for your baby based on age. Get nap times, wake windo…
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Blood Pressure Calculator
Check your blood pressure category. Enter systolic and diastolic readings to see if you ha…
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Blood Sugar Converter
Convert blood glucose between mg/dL and mmol/L instantly. Accurate medical unit conversion…
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BMI Calculator
Calculate BMI using height and weight in metric or imperial units. See your BMI category, …
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Health
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Find out how many …
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Health
Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter neck, waist, hip, and he…
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Health
Body Surface Area Calculator
Free online Body Surface Area Calculator — instant results, no signup required.
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Health
Body Surface Area Calculator
Calculate body surface area (BSA) using Mosteller, DuBois, and other formulas. Important f…
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Body Temperature Converter Calculator
Body Temperature Converter medical calculator for health assessment and monitoring.
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Health
Breastfeeding Calorie Calculator
Free online Breastfeeding Calorie Calculator — instant results, no signup required.
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Health
Caffeine Half Life Calculator
Free online Caffeine Half Life Calculator — instant results, no signup required.
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Caffeine Intake Calculator
Calculate safe caffeine intake. Daily caffeine limits and coffee equivalents.
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Calcium Intake Calculator
Calculate calcium requirements for bone health. Daily calcium intake recommendations.
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Calorie Calculator
Calculate daily calorie needs based on age, height, weight, and activity level. Shows calo…
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Health
Calories Burned Calculator
Calculate calories burned during exercise and daily activities. Enter activity type, weigh…
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Health
Carb Cycling Calculator
Free online Carb Cycling Calculator — instant results, no signup required.
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Child Bmi Percentile Calculator
Child Bmi Percentile medical calculator for health assessment and monitoring.
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Conception Date Calculator
Calculate conception date from due date or last period. Estimate when your baby was concei…
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Contractions Timer
Time and track labor contractions. Record duration, frequency, and intensity to know when …
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Cycling Power Calculator
Calculate cycling power zones based on FTP. Get training zones in watts for effective powe…
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Daily Iron Requirement Calculator
Calculate daily iron needs based on age and sex. Prevent anemia with proper iron intake.
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Fetal Movement Counter
Track baby kicks and movements during pregnancy. Monitor fetal activity with kick counting…
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Framingham Risk Score Calculator
Framingham Risk Score medical calculator for health assessment and monitoring.
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Glycemic Load Calculator
Calculate glycemic load of foods. Understand blood sugar impact for diabetes management an…
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Health
Growth Velocity Calculator Calculator
Growth Velocity Calculator medical calculator for health assessment and monitoring.
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Health
Heart Rate Zone Calculator
Calculate your 5 heart rate training zones based on age or measured max heart rate. Find f…
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Health
Hydration Calculator
Free online Hydration Calculator — instant results, no signup required.
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Health
Ideal Weight Calculator
Calculate your ideal weight range based on height using 4 scientific formulas — Robinson, …
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Health
Insulin to Carb Ratio Calculator
Calculate insulin to carbohydrate ratio for Type 1 diabetes. Determine insulin units neede…
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Health
Intermittent Fasting Calculator
Calculate your intermittent fasting schedule with 16:8, 18:6, 20:4, and OMAD protocols. Ge…
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Health
Iv Drip Rate Calculator Calculator
Iv Drip Rate Calculator medical calculator for health assessment and monitoring.
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Health
Keto Macro Calculator
Calculate perfect keto macros for weight loss. Get daily fat, protein, and carb targets fo…
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Health
Kidney Function eGFR Calculator
Calculate estimated glomerular filtration rate (eGFR) for kidney function assessment. CKD …
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Lean Body Mass Calculator
Calculate lean body mass (LBM) and fat-free mass. Important for fitness tracking and prote…
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Macro Calculator
Calculate your daily macro targets — protein, carbohydrates, and fat — based on your goal,…
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Marathon Time Predictor
Predict marathon finish time from recent race results. Uses Riegel formula to estimate per…
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Meal Timing Calculator
Calculate optimal meal timing for workouts. Pre and post-workout nutrition windows for mus…
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Health
Medication Dosage Calculator Calculator
Medication Dosage Calculator medical calculator for health assessment and monitoring.
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Newborn Feeding Tracker
Track breastfeeding sessions, bottle feeds, and diaper changes. Monitor your newborn's fee…
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One Rep Max Calculator
Calculate your one-rep max (1RM) for any lift using multiple proven formulas. Get training…
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Health
Ovulation Calculator
Calculate your ovulation date and fertile window. Enter your last period date and cycle le…
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Health
Pace Calculator
Calculate running pace, speed, or finish time for any race distance. Supports 5K, 10K, hal…
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Health
Pain Scale Assessment Calculator
Pain Scale Assessment medical calculator for health assessment and monitoring.
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Peak Flow Calculator Calculator
Peak Flow Calculator medical calculator for health assessment and monitoring.
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Period Calculator
Calculate your next period date, fertile window, and upcoming cycles. Enter your last peri…
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Health
Pregnancy Calorie Calculator
Calculate daily calorie needs during pregnancy. Get trimester-specific nutrition guidance …
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Health
Pregnancy Due Date Calculator
Calculate your pregnancy due date from last menstrual period or conception date. See curre…
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Pregnancy Week Calculator
Free online Pregnancy Week Calculator — instant results, no signup required.
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Health
Pregnancy Weight Gain Calculator
Calculate healthy pregnancy weight gain based on pre-pregnancy BMI. Get trimester-by-trime…
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Protein Intake Calculator
Calculate your daily protein needs based on weight, activity level, and fitness goals. Get…
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Race Pace Calculator
Calculate target race pace from goal time. Get pace per km and mile for races from 5K to u…
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Running Pace Calculator
Calculate running pace, speed, and race finish times. Convert between min/km, min/mile, an…
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Health
Sleep Calculator
Find the ideal bedtime and wake-up time based on sleep cycles. Avoid waking in deep sleep …
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Swimming Pace Calculator
Calculate swimming pace per 100m or 100y. Convert pool times and predict race splits for t…
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Target Heart Rate Calculator
Calculate your target heart rate zones for cardio training. Find optimal HR ranges for fat…
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Target Heart Rate Zones Calculator
Calculate your heart rate training zones based on max HR or resting HR. Get 5 zones for op…
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Health
TDEE Calculator
Calculate your TDEE — Total Daily Energy Expenditure. Find exact calories for weight loss,…
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Health
Triathlon Transition Calculator
Calculate triathlon finish time including transitions. Plan T1 and T2 times to optimize to…
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Health
Vegan Protein Calculator
Calculate daily protein requirements for vegan diet. Get plant-based protein targets and f…
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Health
Vitamin D Dosage Calculator
Free online Vitamin D Dosage Calculator — instant results, no signup required.
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Vitamin D Requirement Calculator
Calculate vitamin D needs for optimal health. Sunshine vitamin requirements by age.
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VO2 Max Calculator
Estimate your VO2 max based on age, sex, and resting heart rate. Measure cardiovascular fi…
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Water Intake Calculator
Calculate your daily water intake recommendation based on weight, activity level, and clim…
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