Fitness & Health Calculators
Health and fitness calculators: BMI, BMR, TDEE, calorie needs, macros, body fat, pregnancy due dates and more, using validated clinical formulas.
BMI Calculator
Calculate Body Mass Index from height and weight, and see which WHO category …
Calorie Calculator
Work out daily calorie needs with the Mifflin-St Jeor equation, adjusted for …
Body Fat Calculator
Estimate body fat percentage with the US Navy circumference method and compar…
BMR Calculator
Calculate the calories your body burns at complete rest, using Mifflin-St Jeo…
Macro Calculator
Split a calorie target into grams of protein, carbohydrate and fat for the di…
Ideal Weight Calculator
Compare ideal body weight across the Devine, Robinson, Miller and Hamwi formu…
Pregnancy Calculator
Track a pregnancy week by week: gestational age today, trimester, key milesto…
Pregnancy Weight Gain Calculator
Check pregnancy weight gain against Institute of Medicine guidelines for your…
Pregnancy Conception Calculator
Work backwards from a due date or last period to the likely conception window.
Due Date Calculator
Estimate a due date with Naegele's rule from your last period, a conception d…
Pace Calculator
Convert time and distance into pace and speed, and project finish times for c…
Army Body Fat Calculator
Run the US Army tape test (AR 600-9) and check the result against the standar…
Carbohydrate Calculator
Turn a calorie target and carb percentage into grams of carbohydrate per day …
Lean Body Mass Calculator
Estimate lean body mass with the Boer, James and Hume formulas or directly fr…
Healthy Weight Calculator
Show the healthy weight range for your height using the BMI 18.5–25 band, plu…
Calories Burned Calculator
Estimate calories burned in a workout from MET values, body weight and durati…
One Rep Max Calculator
Estimate a one-rep max from any set, and get a full percentage table for prog…
Target Heart Rate Calculator
Map your five training zones using maximum heart rate or the more accurate Ka…
Protein Calculator
Set a daily protein target based on body weight and training goal, with a per…
Fat Intake Calculator
Convert a fat percentage target into grams per day, with the saturated fat li…
TDEE Calculator
Calculate total daily energy expenditure and see the cutting, maintenance and…
Ovulation Calculator
Estimate ovulation and the six-day fertile window from your cycle length and …
Conception Calculator
Find the days you are most likely to conceive, based on ovulation timing and …
Period Calculator
Predict your next six periods, plus ovulation and PMS windows, from your cycl…
GFR Calculator
Estimate glomerular filtration rate with the 2021 CKD-EPI creatinine equation…
Body Type Calculator
Classify body shape from bust, waist and hip measurements, and see waist-to-h…
Body Surface Area Calculator
Calculate body surface area with the four standard clinical formulas used for…
BAC Calculator
Estimate blood alcohol concentration with the Widmark formula and the time un…
Anorexic BMI Calculator
Show where a BMI sits relative to clinical underweight thresholds, with the s…
Weight Watcher Points Calculator
Estimate a points value for a food from its calories, saturated fat, sugar an…
Overweight Calculator
See how far a weight sits above the healthy BMI band and what reaching the to…
About the fitness & health calculators
Health and fitness calculators: BMI, BMR, TDEE, calorie needs, macros, body fat, pregnancy due dates and more, using validated clinical formulas. There are 31 tools in this category, and each one shows the formula it uses, works instantly as you type, and keeps your figures on your own device.
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