IIFYM Calculator
Sets a daily calorie target from the Mifflin-St Jeor equation, then splits it into grams of protein, fat and carbohydrate from your g/kg and fat-percent.
Health
25 tools
The Health category provides essential utilities for tracking personal wellness metrics and monitoring physical health indicators. These tools help individuals and fitness professionals quantify biological data to better understand their body composition and health risks. By using the BMI Calculator and similar diagnostic utilities, users can establish a baseline for their health goals and monitor progress over time through objective measurements.
Tools in this category
Flexible Dieting Calculator
Set daily calories and protein, fat and carb grams for flexible dieting (IIFYM) from the Mifflin-St Jeor equation, your activity level and a cut.
Carbohydrate Calculator
Turn daily calories and a carb percentage into grams of carbohydrate per day and per meal, checked against the 45–65% US range and a fiber target.
Cholesterol Calculator
Estimate LDL cholesterol from total, HDL and triglycerides in mg/dL or mmol/L, with the ATP III LDL category, non-HDL value and total-to-HDL ratio.
Macronutrient Calculator
Turn a daily calorie target into grams of carbohydrate, protein and fat using 4, 4 and 9 kcal per gram, with per-meal amounts and AMDR range checks.
Nuchal Translucency Calculator
Compare a nuchal translucency measurement with the median and 95th centile for the crown-rump length, from 45 to 84 mm, and see the NT multiple of the median.
Postmenopause Calculator
Find the date menopause was confirmed from your last period, the years since, and your STRAW+10 postmenopause stage from +1a through +2.
Morning Sickness Calculator
Enter the first day of your last period to see your pregnancy week and the dates nausea usually starts (week 6), peaks (weeks 8–12) and eases (weeks 16–20).
Menopause Calculator
Find the date menopause is confirmed: 12 months after your last period. Shows days without a period, days left and whether your age is typical or early.
Perimenopause Calculator
Match your recent period pattern to the STRAW+10 stages, from late reproductive to postmenopause, and see how far you are from the average menopause age of 51.
FET Due Date Calculator
Turns a frozen embryo transfer date and embryo age into a due date, plus weeks pregnant on any check day. A day-5 FET adds 261 days.
Reverse Due Date Calculator
Enter a due date to work back to the first day of the last period and the likely conception date, with an adjustment for cycles from 21 to 45 days.
Ovulation Calculator
Estimate your ovulation day and six-day fertile window from your last period and cycle length, with the next six cycles laid out in a table.
Baby Size Calculator
Estimate your baby's weight from 10 to 40 weeks using the Hadlock ultrasound standard, in grams and pounds, with a fruit-size comparison for each week.
IVF Due Date Calculator
Estimate an IVF due date from the embryo transfer date and embryo age. A day-5 transfer adds 261 days, as set out in ACOG guidance on dating pregnancies.
Calories Burned Calculator
Estimate calories burned for walking, running, cycling, swimming and more from body weight and minutes, using 2011 Compendium MET values and the 3.5 mL/kg rule.
Calorie Deficit Calculator
Estimate maintenance calories with the Mifflin-St Jeor equation, subtract a daily deficit and see the intake target and the expected weekly weight loss.
Daily Calorie Calculator
Estimate the calories you burn per day from age, sex, height, weight and activity, using the Mifflin-St Jeor equation, plus loss and gain targets.
Calorie Surplus Calculator
Find your daily calorie target for gaining weight: Mifflin-St Jeor resting energy, an activity factor, and a lean 250 or standard 500 kcal surplus.
Calorie Calculator
Estimate daily maintenance calories from age, sex, height, weight and activity with the Mifflin-St Jeor equation, plus loss and gain targets.
Ideal Weight Calculator
Estimate ideal body weight from height and sex with the Devine, Robinson, Miller and Hamwi formulas, plus the weight range for a BMI of 18.5 to 24.9.
Ideal Weight for Height Calculator
Estimate ideal body weight from height and sex with the Devine, Robinson, Miller and Hamwi formulas, side by side with the WHO healthy BMI weight range.
Obesity Calculator
Find your WHO obesity class from height and weight, see how far you are from the BMI 30 line, and add a waist size to check the 102 cm or 88 cm risk cut-off.
Healthy Weight Calculator
Find the adult weight range that keeps BMI between 18.5 and 24.9 at your height, in kg or lb, plus the BMI 22 midpoint and where your weight sits.