Use these everyday planning tools to understand useful health estimates. Every calculation runs locally in your browser, and every page explains its method and limitations.
BMI Calculator
Estimate adult body mass index from height and weight and see the corresponding CDC screening category.
Open calculator →Balanced Diet Calculator
Turn a daily calorie level into a simple USDA MyPlate food-group pattern for adults and teens age 14 or older.
Open calculator →Daily Calorie Needs Calculator
Estimate daily calories for weight maintenance using the Mifflin–St Jeor resting-energy equation and an activity factor.
Open calculator →Protein Needs Calculator
Estimate a daily protein range from body weight and general activity level.
Open calculator →Period Date Calculator
Estimate the next three period start dates from the first day of the last period and a typical cycle length.
Open calculator →Target Heart Rate Calculator
Estimate age-based heart-rate zones for moderate- and vigorous-intensity exercise.
Open calculator →Macros Calculator
Convert a calorie target and chosen carbohydrate, protein, and fat percentages into grams per day.
Open calculator →Pregnancy Due Date Calculator
Estimate a due date from the first day of the last menstrual period, with an optional adjustment for usual cycle length.
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