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Free health calculators

Every number your health plan starts with

No signup, no paywall — the same formulas VitalNova AI uses to build your personalized plan.

BMI Calculator

Body mass index & healthy weight category

BMR Calculator

Calories burned at complete rest

Calorie Calculator

Daily calorie target for your goal

Water Intake

Daily hydration based on weight & activity

Protein Calculator

Daily protein grams for your goal

Ideal Weight

Healthy weight range for your height

Body Fat %

US Navy tape-measure method

Macro Calculator

Protein, fat & carb split

Heart Rate Zones

Training zones by age