BMI & Calorie Calculator
Your BMI, BMR and daily calorie targets for maintain, loss or gain — figured out instantly and privately.
🔒 Calculated locally — nothing is sent anywhere.
ℹ️ These figures are general estimates for healthy adults and are informational only — not medical advice. BMI doesn't account for muscle mass or body composition. Talk to a doctor or dietitian before changing your diet or exercise.
From body metrics to a daily calorie target
BMI compares your weight to your height; BMR (via the Mifflin-St Jeor equation) is the energy you'd burn at rest; and TDEE multiplies that by your activity to estimate daily needs. From there we suggest calories to maintain, lose or gain weight at a steady pace. It all runs in your browser — fast, private and free forever. Building something health-related? Digital Heroes can help.