Health & Fitness Calculators
BMI, calorie, macro, and body composition calculators to support your health and fitness goals.
66 calculators available
BMI Calculator
Calculate your Body Mass Index and understand what your BMI means for your health.
Calorie Calculator
Determine your daily calorie needs based on age, sex, weight, height, and activity level.
TDEE Calculator
Calculate your Total Daily Energy Expenditure for accurate nutrition planning.
BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at rest.
Macro Calculator
Calculate your ideal daily intake of protein, carbs, and fat based on your goals.
BAC Calculator
Estimate your blood alcohol concentration based on drinks, weight, and time.
Due Date Calculator
Calculate your estimated due date based on your last menstrual period or conception date.
Ovulation Calculator
Predict your most fertile days and ovulation date based on your menstrual cycle.
A1C Calculator
Convert between A1C percentage and estimated average blood glucose levels.
One Rep Max Calculator
Estimate your one-rep max for any lift using weight and reps performed.
Height Calculator
Predict a child's adult height based on parental heights and current age.
Max Bench Calculator
Estimate your bench press one-rep max from submaximal lifts.
Pregnancy Calculator
Track your pregnancy week by week and estimate key milestones and your due date.
Height Percentile Calculator
See where your height falls on the growth chart compared to the population.
Protein Calculator
Calculate your daily protein requirements based on weight, activity, and goals.
Maintenance Calorie Calculator
Find the exact number of calories you need to maintain your current weight.
Bulking Calculator
Calculate your optimal calorie and macro intake for gaining muscle mass.
LBM Calculator
Estimate your lean body mass using height, weight, and body measurements.
Cutting Calculator
Calculate your optimal calorie and macro targets for losing fat while preserving muscle.
Fiber Calculator
Determine your recommended daily fiber intake based on age and sex.
Caffeine Calculator
Track your caffeine intake and estimate when it will leave your system.
Biological Age Calculator
Estimate your biological age based on lifestyle factors and health markers.
Blood Type Calculator
Predict possible blood types of a child based on parents' blood types.
Peptide Calculator
Calculate peptide molecular weight, reconstitution, and dosing amounts.
Baby Eye Color Calculator
Predict the probability of your baby's eye color based on parental genetics.
Dog Pregnancy Calculator
Calculate your dog's due date and track pregnancy stages from breeding date.
Body Fat Calculator
Calculate your body fat percentage using the US Navy circumference method for men and women.
Water Intake Calculator
Calculate your daily water intake based on weight, activity level, climate, and pregnancy.
Sleep Calculator
Calculate the best time to wake up or go to sleep based on sleep cycles for optimal rest.
Weight Loss Calculator
Calculate how many calories to eat per day to reach your goal weight by your target date.
Ideal Weight Calculator
Calculate your ideal body weight using four proven medical formulas — Devine, Robinson, Miller, and Hamwi — based on your height and sex.
Keto Calculator
Calculate your ideal fat, protein, and carb macros for a ketogenic diet based on your weight, height, age, sex, activity level, and keto goal.
Calorie Deficit Calculator
Calculate your daily calorie deficit to lose weight at your target rate. Find out exactly how many calories to eat per day and when you will reach your goal weight.
VO2 Max Calculator
Estimate your VO2 max aerobic fitness level from running time or heart rate tests.
Running Calorie Calculator
Calculate calories burned running based on distance, pace, and your body weight.
Steps to Calories Calculator
Convert your daily step count to calories burned based on your weight and stride length.
Walking Calorie Calculator
Calculate calories burned walking based on distance, speed, terrain, and body weight.
Swimming Calorie Calculator
Calculate calories burned swimming by stroke type, duration, and body weight.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and assess cardiovascular and metabolic health risk.
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio — a more accurate obesity and health risk predictor than BMI.
Bench Press Calculator
Calculate how much you should bench press based on your body weight and training level.
Squat Calculator
Calculate squat strength standards and estimated one-rep max for your weight and experience level.
Deadlift Calculator
Calculate deadlift strength standards and one-rep max estimates for your weight class.
Muscle Mass Calculator
Estimate your skeletal muscle mass and compare it to reference ranges for your age and sex.
Body Frame Size Calculator
Determine if you have a small, medium, or large body frame using wrist circumference or elbow breadth.
Calorie Burn Calculator
Calculate calories burned for 100+ activities based on your body weight and duration.
BMI Percentile Calculator for Children
Calculate BMI percentile for children ages 2–20 using CDC growth charts.
Creatinine Clearance Calculator
Calculate creatinine clearance and eGFR using the Cockcroft-Gault equation for kidney function.
Body Surface Area Calculator
Calculate body surface area for medical dosing using Mosteller, Du Bois, and Haycock formulas.
Anion Gap Calculator
Calculate anion gap from sodium, chloride, and bicarbonate values to evaluate metabolic acidosis.
Mean Arterial Pressure Calculator
Calculate mean arterial pressure from systolic and diastolic blood pressure readings.
BMI Prime Calculator
Calculate your BMI Prime — the ratio of your BMI to the upper limit of the healthy range.
Blood Pressure Calculator
Interpret your blood pressure reading and see if it falls in normal, elevated, or hypertensive range.
Alcohol Burn-Off Calculator
Calculate how long it takes to sober up after drinking and when it is safe to drive.
IVF Due Date Calculator
Calculate your IVF due date from egg retrieval, 3-day transfer, or 5-day blastocyst transfer date.
Conception Date Calculator
Estimate when you conceived based on your due date or last menstrual period.
Period Calculator
Predict your next period, fertile window, and PMS dates for the next 12 months.
Weeks Pregnant Calculator
Calculate exactly how many weeks and days pregnant you are from your last period or due date.
Smoking Cost Calculator
Calculate how much money you spend on cigarettes per year and what you could save by quitting.
Alcohol Calorie Calculator
Calculate calories in beer, wine, and spirits and see how alcohol affects your daily calorie budget.
Nurse Medication Dosage Calculator
Calculate medication dosing using the weight-based formula for nursing and clinical practice.
IV Drip Rate Calculator
Calculate IV drip rate in drops per minute or mL per hour for clinical infusion settings.
Pregnancy Due Date by Ultrasound Calculator
Calculate your adjusted due date and gestational age from an ultrasound measurement.
Pregnancy Weight Gain Calculator
Calculate healthy weight gain during pregnancy by trimester based on your pre-pregnancy BMI.
Target Heart Rate Calculator
Calculate your target heart rate training zones for fat burn, cardio, and peak effort.
Adjusted Body Weight Calculator
Calculate adjusted body weight (AdjBW) for medication dosing in obese patients using IBW.