Free Nutrition & Health Calculators
Quick, science-based calculators to understand your body and your nutrition. No signup, instant results — then get personalized plans in the SmartEat app.
Science-based
Instant results
100% free
No signup · private
Calorie Calculator
Find your daily calorie target for losing, maintaining, or gaining weight.
Open calculator →BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at rest.
Open calculator →BMI Calculator
Check your Body Mass Index and see which weight category you fall into.
Open calculator →
This tool provides general informational estimates only and is not medical advice,
diagnosis, or treatment. Results use population-average formulas and may not fit your individual situation.
Always consult a qualified healthcare professional before making health, diet, or medical decisions.
Get personalized plans in the SmartEat app
These calculators give you a starting point. SmartEat turns the numbers into AI-personalized meal plans, food tracking, and guidance backed by certified nutrition expertise.
