Health & Fitness Tools

Health and fitness estimators for nutrition, metabolism, and body metrics.

Pregnancy Calculator

Calculate pregnancy due date, gestational age, conception date, and key trimester milestones from LMP or expected due date.

Pregnancy due date calculator from LMP, ultrasound, IVF, or CRL; gestational age, trimester dates, Time Machine, and cycle length.

Estimate BMI from your height and weight and get an at-a-glance health category.

Estimate daily calories from macro grams using 4/4/9 nutrition rules.

Estimate body fat percentage using the US Navy tape-measure approach.

Estimate your BMR using the Mifflin–St Jeor equation and get an at-rest calorie baseline.

Compute estimated daily calorie burn using BMR and an activity factor.

Calculate hair dye and developer amounts for a standard 1:2 mix. Enter color, developer, or total bowl amount in grams or ml.

Track recovery clean time from your clean date: years, months, days, total days sober, live counter, and common milestones (30, 60, 90 days, 1 year).

Estimate daily water target from body weight using a configurable ml/kg guideline.

Split daily calories into protein, carb, and fat grams using 4/4/9 kcal per gram.

Estimate resting metabolism (BMR) and total daily energy (TDEE) from weight, height, age, sex, and activity factor.