Health calculators that just work.
Track your health metrics with clear, accurate calculators. BMI, calories, macros, body fat, and more — everything runs instantly in your browser. No accounts, no data collection.
BMI Calculator
Calculate your Body Mass Index instantly. See your BMI category, healthy weight range, and what your number means.
Calorie Calculator
Calculate your BMR and TDEE. Find your daily calorie needs for weight loss, maintenance, or muscle gain.
Macro Calculator
Find your ideal protein, carb, and fat targets based on your calorie needs and fitness goal. Free macro tracking.
BMR Calculator
Calculate your Basal Metabolic Rate — calories burned at rest. See Mifflin-St Jeor and Harris-Benedict results plus your TDEE.
Body Fat Calculator
Calculate your body fat percentage using the US Navy method. See your category, lean mass, and fat mass.
Ideal Weight Calculator
Find your ideal body weight using four medical formulas — Devine, Robinson, Miller, and Hamwi — plus your healthy BMI range.
Water Intake Calculator
Calculate how much water you should drink daily. Based on weight, exercise, climate, and pregnancy. See your target in liters and glasses.
Why Vital?
Private by design. Every calculation runs in your browser. Your health data never leaves your device.
Clear and visual. Interactive charts, visual gauges, and plain-English explanations.