Health Calculators
Our health calculators turn body metrics into clear, actionable numbers, covering BMI, body fat percentage, daily calorie needs, BMR, and macronutrient targets. Use them to set realistic fitness goals and monitor your progress, all from your phone or desktop.
Alcohol Units Calculator
Convert any drink volume and ABV into UK alcohol units and US standard drinks.
Anorexic BMI Calculator
Assess underweight risk and understand BMI ranges associated with anorexia.
Army Body Fat Calculator
Calculate body fat using the U.S. Army body composition standards.
BAC Calculator
Estimate blood alcohol concentration based on drinks consumed.
BMI Calculator
Calculate your Body Mass Index and understand your weight category.
BMR Calculator
Calculate your basal metabolic rate — calories burned at rest.
Body Fat Calculator
Estimate body fat percentage using various measurement methods.
Body Surface Area Calculator
Calculate body surface area (BSA) using multiple medical formulas.
Body Type Calculator
Determine your body type (ectomorph, mesomorph, or endomorph) from measurements.
Calorie Calculator
Calculate daily calorie needs for maintaining, losing, or gaining weight.
Calorie Deficit Calculator
Set a daily calorie deficit and see your target intake and projected weekly weight loss.
Calories Burned Calculator
Calculate calories burned during various exercises and activities.
Carbohydrate Calculator
Calculate daily carbohydrate intake needs based on your goals and activity.
Child BMI Percentile Calculator
Compute a child or teen BMI from weight and height and see how percentile bands are read.
Conception Calculator
Calculate the best time to conceive based on your menstrual cycle.
Creatinine Clearance Calculator
Estimate creatinine clearance with the Cockcroft-Gault equation from age, weight, sex, and serum creatinine.
Due Date Calculator
Calculate your estimated due date based on last menstrual period or conception date.
Fat Intake Calculator
Calculate daily fat intake needs based on your calorie target and health goals.
FFMI Calculator
Calculate Fat-Free Mass Index (FFMI) and normalized FFMI from weight, body fat, and height.
FTP Calculator
Estimate cycling Functional Threshold Power from a 20-minute test and build seven training power zones.
GFR Calculator
Calculate glomerular filtration rate to assess kidney function.
Healthy Weight Calculator
Find your healthy weight range based on height, age, and gender.
Ideal Weight Calculator
Calculate your ideal body weight using multiple medical formulas.
Intermittent Fasting Calculator
Map your daily eating and fasting windows for 16:8, 18:6, 20:4, or OMAD schedules.
Lean Body Mass Calculator
Calculate your lean body mass (everything except fat).
Macro Calculator
Calculate daily macronutrient targets — protein, carbs, and fat.
Max Heart Rate Calculator
Estimate your maximum heart rate from age and view five training zones as a percentage of MHR.
Mean Arterial Pressure Calculator
Calculate mean arterial pressure (MAP) and pulse pressure from your systolic and diastolic readings.
One Rep Max Calculator
Estimate your one-rep max from the weight and reps you can perform.
Overweight Calculator
Determine if you are overweight and by how much based on BMI and other metrics.
Ovulation Calculator
Predict ovulation dates and fertile window based on your menstrual cycle.
Pace Calculator
Calculate running or walking pace, speed, distance, or time.
Pack-Years Calculator
Calculate smoking pack-years from cigarettes per day and years smoked to summarize cumulative tobacco exposure.
Period Calculator
Predict your next period date and track your menstrual cycle.
Pregnancy Calculator
Track pregnancy milestones, due date, and trimester progression.
Pregnancy Conception Calculator
Estimate the conception date based on due date or last menstrual period.
Pregnancy Weight Gain Calculator
Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI.
Protein Calculator
Calculate daily protein intake needs based on your weight and fitness goals.
Sober-Up Time Calculator
Estimate how many hours it takes for a given blood alcohol level to reach zero.
Steps to Calories Calculator
Convert your daily step count into calories burned, distance walked, and stride length.
Sweat Rate Calculator
Estimate your hourly sweat rate from body-weight change, fluid intake, and urine loss during exercise.
Swim Pace Calculator
Calculate your swimming pace per 100 meters or yards and average speed from distance and time.
Target Heart Rate Calculator
Calculate your target heart rate zones for optimal exercise intensity.
TDEE Calculator
Calculate your total daily energy expenditure based on activity level.
VO2max / VDOT Calculator
Estimate your VO2max and VDOT running fitness score from a recent race time.
Waist-to-Height Ratio Calculator
Divide your waist by your height to screen for central obesity using the WHtR guideline.
Waist-to-Hip Ratio Calculator
Divide your waist by your hip measurement to find your WHR and its health-risk band.
Water Intake Calculator
Estimate how much water you should drink each day based on body weight and activity.
Weight Watchers Points Calculator
Calculate Weight Watchers points for food items based on nutritional values.
Wilks Calculator
Calculate your Wilks score and coefficient from bodyweight, total lifted, and sex.