Health Calculators — figured.fyi

Adderall Dosage Calculator

Calculate safe Adderall dosage recommendations based on age, weight, and condition severity. Get personalized dosing guidance for ADHD treatment.

Adjusted Age Calculator

Calculate your premature baby's adjusted age in seconds. Enter gestational age and current age to find where they are developmentally.

Adjusted Body Weight Calculator

Calculate adjusted body weight for medication dosing and clinical decisions. Enter height, actual weight, and sex to get your ABW instantly.

Adjusted Weight Calculator

Calculate adjusted body weight using the Devine formula. Used in clinical dosing and nutrition — get your IBW and adjusted weight in seconds.

Age Checker

Enter your date of birth to instantly find your exact age in years, months, and days. See your next birthday countdown too.

Aleve Dosage Calculator

Calculate safe Aleve (naproxen sodium) dosage based on your weight and pain level. Get recommended doses for adults and children with safety guidelines.

Arterial Age Calculator

Find out if your arteries are aging faster than you are. Enter your blood pressure, cholesterol, and lifestyle factors to see your arterial age.

Basal Metabolic Rate Calculator

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Find how many calories your body burns at rest in under a minute.

Biological Age Estimator

Calculate your biological age based on health markers and lifestyle factors. Compare your body's true age to chronological age with this estimator.

Birthweight Percentile Calculator

Calculate your baby's birthweight percentile compared to standard growth charts. Enter weight, gestational age, and sex to see if birthweight is typical.

Blood Pressure Calculator

Calculate your blood pressure category and health risk. Free tool determines if readings are normal, elevated, or high blood pressure stage 1 or 2.

Blood Pressure Category Explainer

Check your blood pressure category with our calculator. Enter systolic and diastolic readings to see if your BP is normal, elevated, or high blood pressure.

BMI Calculator

Calculate your Body Mass Index (BMI) instantly. Enter height and weight to determine if you're underweight, normal, overweight, or obese.

BMI Calculator

Calculate your Body Mass Index (BMI) instantly. Enter height and weight to see your BMI category and health range in metric or imperial units.

BMI Kids Calculator

Calculate BMI percentile for children aged 2-20 years. Get accurate body mass index assessment with age and gender-specific growth charts for kids.

Bmi Men Calculator

Calculate your BMI as a man and find out if your weight is in a healthy range. Enter height and weight for an instant result.

Bmi Teens Calculator

Calculate BMI for teens aged 2-19 using CDC growth charts. Get weight category and percentile context in under a minute.

Bmi Women Calculator

Calculate BMI for women with body fat context, healthy weight range, and what your number actually means for your health.

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy tape measure method. Enter your measurements to see where you stand in under a minute.

Body Fat Calculator

Calculate your body fat percentage using Navy Method measurements. Get accurate results with waist, neck, and hip measurements for fitness tracking.

Body Fat Percentage Calculator

Calculate your body fat percentage using Navy method measurements. Find out if your body composition is healthy for your age and fitness goals.

Body Water Calculator

Calculate your total body water percentage and volume using Watson formula. Enter age, weight, height, and gender for accurate hydration assessment.

Breastfeeding Calorie Calculator

Find out how many extra calories you need while breastfeeding based on your weight, activity level, and feeding frequency.

Caffeine Half-Life Calculator

Calculate how long caffeine stays in your system. Enter caffeine amount and consumption time to see remaining caffeine levels and when it clears your body.

Cage Questionnaire Calculator

Score the CAGE questionnaire instantly. Find out if your drinking pattern suggests alcohol dependence and what the score means for your next steps.

Calculator Web Page

Calculate your daily calorie needs based on age, weight, height, and activity level. Find out how many calories to eat to reach your health goal.

Calorie Calculator

Calculate your daily calorie needs based on age, weight, height, and activity level. Find your maintenance calories and targets for weight loss or gain.

Calorie Calculator

Calculate daily calories needed to maintain, lose, or gain weight. Enter age, height, weight, and activity level to get your personalized calorie target.

Calorie Deficit Calculator

Find your daily calorie deficit to lose weight at your target rate. Enter your stats and goal to get a personalized calorie target.

Calorie Deficit Calculator

Calculate your daily calorie deficit to reach your weight loss goals. Enter current weight, target weight, and timeline to find exactly how many calories to ...

Calories Burned Calculator

Calculate calories burned during exercise based on activity type, duration, and body weight. Get accurate estimates for walking, running, cycling, and 50+ ac...

Clomid Ovulation Calculator

Calculate your likely ovulation window after Clomid. Enter your cycle start date and dose day to find your peak fertility days.

Conception Date Calculator

Estimate your conception date from your due date or last menstrual period. Find out when you likely conceived in under a minute.

Creatinine Clearance Calculator

Calculate kidney function with creatinine clearance using the Cockcroft-Gault formula. Enter age, weight, gender, and serum creatinine for instant results.

Date Age

Calculate your exact age in years, months, and days from your date of birth. Find out precisely how old you are today.

Dead Space Calculator

Calculate anatomical and physiological dead space volume to assess ventilation efficiency and guide respiratory management decisions.

Dosage Calculator

Calculate the correct medication dose by weight for adults and children. Enter weight and prescribed dose to get the right amount fast.

Due Date Calculator

Calculate your pregnancy due date from last menstrual period or conception date. Free due date calculator with accurate 40-week gestation timeline.

Energy Usage Calculator

Calculate your daily energy expenditure and find out if your calorie intake matches what your body actually burns each day.

Fundal Height Calculator

Check whether your fundal height measurement is on track for your gestational age. Enter your measurement to see if it falls within the expected range.

Geriatric Bmi Calculator

Calculate BMI adjusted for adults 65 and older. Get age-appropriate weight categories and muscle mass context in under a minute.

Gestational Age Calculator

Calculate gestational age in weeks and days from your last menstrual period or conception date. Get your estimated due date instantly.

Gestational Age Calculator

Calculate your gestational age in weeks and days from your last menstrual period or conception date. Find your due date instantly.

Health Calculator

Calculate your BMI, daily calorie needs, and ideal weight range. Enter height, weight, age, and activity level for personalized health metrics.

Heart Rate Calculator

Calculate your maximum heart rate and target heart rate zones for optimal exercise intensity. Free heart rate calculator with age-based formulas.

Heart Rate Zone Calculator

Calculate your target heart rate zones for optimal training. Enter your age and resting heart rate to find fat burn, cardio, and peak zones instantly.

Height Calculator

Convert height between feet, inches, and centimeters instantly. Get your exact measurement in all units for forms, medical records, or travel.

Hydration Calculator

Calculate your daily water intake needs based on weight, activity level, and climate. Get personalized hydration recommendations in liters or gallons.

Ibuprofen Dosage Calculator

Calculate the correct ibuprofen dose by weight for adults and children. Get safe dosing intervals and daily maximums in under 60 seconds.

Ideal Weight Calculator

Calculate your ideal body weight using four clinical formulas. See which range fits your height, sex, and frame in under a minute.

Ideal Weight Calculator

Calculate your ideal weight range using BMI-based formulas. Enter height, age, and gender to find healthy weight targets for optimal wellness and fitness goals.

Insulin Dosage Calculator

Calculate your correction and mealtime insulin dose based on current blood sugar, target, carb intake, and sensitivity factor.

Intermittent Fasting Calculator

Calculate your intermittent fasting schedule with eating and fasting windows. Enter your preferred fasting method and start time to see your daily eating per...

Macro Calculator for Weight Loss

Calculate daily protein, carbs, and fat intake for weight loss based on your goals. Enter stats, activity level, and target deficit for personalized macros.

Macronutrient Calculator

Calculate your daily macronutrient needs (protein, carbs, fats) based on weight, activity level, and fitness goals. Free macro calculator.

Maintenance Calorie Calculator

Calculate your maintenance calories using the Mifflin-St Jeor equation. Find out exactly how many calories you need to stay at your current weight.

Meal Calorie Calculator

Add up to 6 ingredients with portions and get your meal's total calories, protein, carbs, and fat in seconds.

Melatonin Dosage Calculator

Find your starting melatonin dose based on your age, weight, and sleep goal. Get a personalized range in under a minute.

Metabolic Rate Calculator

Calculate your basal metabolic rate (BMR) and daily calorie needs using the Mifflin-St Jeor equation. Free metabolic rate calculator with activity levels.

My Age Date

Find your exact age in years, months, and days. Enter your date of birth to instantly calculate how old you are today.

Overweight Calculator

Calculate your BMI and healthy weight range instantly. Find out if your current weight falls within a healthy range for your height and age.

Ovulation Calculator

Find your most fertile days based on your cycle length and last period. Get your ovulation window in seconds.

Ovulation Calculator

Calculate your ovulation date and fertile window based on cycle length and last period. Find your best days to conceive or track your cycle.

Paracetamol Dosage Calculator

Calculate the correct paracetamol dose by weight for adults and children. Find safe dosing intervals and maximum daily limits in under a minute.

Peptide Dosage Calculator

Calculate how many units to draw in a syringe for any peptide dose. Enter vial size, water added, and target dose to get your exact draw amount.

Pregnancy Calculator

Calculate your due date, current pregnancy week, and key milestones. Enter your last menstrual period or conception date to track your pregnancy timeline.

Pregnancy Test Calculator

Find out the best day to take a pregnancy test based on your cycle length and last period. Get a clear testing window in under a minute.

Pregnancy Weight Gain Calculator

Calculate healthy pregnancy weight gain based on your pre-pregnancy BMI and current week. Get personalized recommendations following medical guidelines.

Protein Intake Calculator

Calculate your daily protein needs based on weight, activity level, and goals. Get personalized protein intake recommendations for muscle building.

Rem Sleep Calculator

Find your ideal bedtime or wake time based on 90-minute sleep cycles. Enter when you need to wake up and get cycle-aligned sleep windows.

Running Pace Calculator

Calculate your running pace, race time, or distance. Enter any two values to find the third. Perfect for training plans and race goals.

Sleep Calculator

Find your ideal bedtime or wake-up time based on sleep cycles. Enter when you need to wake up and get your best times to fall asleep.

Sleep Calculator

Calculate optimal bedtime and wake-up time based on sleep cycles. Find out when to sleep and wake up to feel refreshed and avoid grogginess.

Sleep Cycle Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed instead of groggy by timing your sleep right.

Sleep Cycle Calculator

Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles. Enter your preferred sleep or wake time to find the best schedule for feeling refr...

Sleep Debt Calculator

Calculate your weekly sleep debt in minutes and hours. Find out how far behind you are and how long recovery will take.

Sleep Debt Calculator

Calculate your sleep debt by comparing actual sleep hours to recommended sleep needs. Track sleep deficit and recovery time for better health.

Sleep Time Calculator

Find your ideal bedtime or wake time based on sleep cycles. Enter when you need to wake up and get exact times to fall asleep.

Supplement Evidence Grader

Grade supplement evidence strength using systematic criteria. Assess study quality, consistency, and clinical relevance for informed health decisions.

Take My Age

Find out your exact age in years, months, days, hours, and minutes. Enter your birthdate and get a precise breakdown instantly.

Tdee Calculator

Calculate your Total Daily Energy Expenditure to know exactly how many calories to eat for weight loss, maintenance, or muscle gain.

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) to determine exactly how many calories you burn each day based on your body size, age, and activity level.

Tylenol Dosage Calculator

Find the right Tylenol dose for adults and children by weight and age. Get safe acetaminophen dosing in seconds.

VO2 Max Calculator

Calculate your VO2 max to measure cardiovascular fitness and aerobic capacity. Find your fitness level compared to age and gender standards.

VO2 Max Estimator

Calculate your VO2 max using simple fitness tests. Find your cardiovascular fitness level and track aerobic capacity improvements over time.

Waist to Hip Ratio Calculator

Calculate your waist to hip ratio (WHR) to assess body fat distribution and health risks. Enter waist and hip measurements to get your ratio instantly.

Water Intake Calculator

Calculate your daily water intake needs based on weight, activity level, and climate. Get personalized hydration recommendations for optimal health.

Weight Gain Calculator

Calculate how long it will take to reach your target weight with a realistic calorie surplus plan. Get your daily calorie target in under a minute.

Zone 2 Training Calculator

Calculate your Zone 2 training heart rate range for optimal aerobic base building and fat burning. Enter age and resting heart rate for personalized training...