Health Calculators

Choose the right calculator

Convert health units and calculate quantitative estimates without interpreting personal results.

Lean Body Mass Calculator

Calculate lean body mass from an entered body-fat estimate, alongside FFMI and waist ratios. The Deurenberg figure is a separate population estimate, not a measurement.

Glucose Converter

Convert glucose, cholesterol, or triglyceride values among mg/dL, mmol/L, and g/L using the selected substance’s existing conversion constant. No clinical interpretation is provided.

Pack Years Calculator

Add one or more smoking periods to calculate cumulative pack-years from cigarettes per day and years. This is arithmetic exposure, not a risk score.

BMI Calculator

Calculate adult BMI from weight and height. The optional pound and foot/inch inputs are converted to the same metric calculation. The displayed BMI-derived weight bounds are population reference values, not personal targets.

Child BMI Calculator

Calculate a child’s BMI from weight and height, then compare it with the WHO 2007 BMI-for-age reference for the selected sex and age in completed months. The comparison uses separate girls’ and boys’ tables and is informational, not a diagnosis.

Ideal Weight Calculator

Compare the weights corresponding to the adult BMI reference bounds with the existing historical Lorenz formula. These are arithmetic reference estimates; the calculator does not determine an individually or medically ideal weight.

Bmr Calculator

Estimate resting energy expenditure with the existing Mifflin–St Jeor equation. Enter weight and height in metric or U.S. customary units; both paths use the same equation after conversion.

Calorie Calculator

Estimate total daily energy expenditure (TDEE) by multiplying the existing Mifflin–St Jeor resting estimate by the selected activity factor. The fixed categories are coarse estimates, not direct measurements.

Calorie Deficit Calculator

Compare an entered TDEE with entered calorie intake, and calculate a separate scenario from an entered deficit. These are mathematical differences; no weight-change forecast or dietary recommendation is calculated.

Macro Calculator

Convert a calorie amount into grams of protein, carbohydrates, and fat using the percentages you choose. The three percentages must add to 100%; the calculator does not choose a diet or a personal target.

Protein Calculator

Multiply your body weight by a coefficient you enter in grams per kilogram per day. Pounds and kilograms use the same underlying calculation. The coefficient is your scenario input, not a protein recommendation selected for you.

Sleep Calculator

Calculate a time window from bedtime to wake time after subtracting the assumed time to fall asleep. You can compare this window with an assumed cycle length and count, but this does not observe real sleep or determine sleep quality.