VitalMetrics

What it does

Free, accurate health calculators: BMI, calorie (TDEE), body fat percentage, ideal weight, daily water intake, heart rate zones, and pregnancy due date. No sign-up, instant results.

Seven free, evidence-based calculators — BMI, calories, body fat, ideal weight, hydration, heart rate zones, and due dates. No sign-up, no app, results in seconds. Every tool below runs instantly and privately in your browser — nothing you type is uploaded anywhere. Body Mass Index from your height and weight, with the standard WHO category. BMI doesn't distinguish muscle from fat — use alongside body fat % for a fuller picture. Daily calorie needs using the Mifflin-St Jeor equation and your activity level. U.S. Navy circumference method — just a tape measure needed. Reference range using the Devine formula, standard in clinical dosing. Training zones from your max heart rate, optionally…from amanyalrefai832-tech.github.io

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