
Calorie Deficit Calculator – Doctor-Verified 2026
Calculate your exact calorie deficit for safe fat loss — not muscle loss. Doctor-verified tool using Mifflin-St Jeor equation. Free, accurate & updated for 2026.

Calculate your exact calorie deficit for safe fat loss — not muscle loss. Doctor-verified tool using Mifflin-St Jeor equation. Free, accurate & updated for 2026.

Your BMR is the number of calories your body burns doing absolutely nothing. Calculate yours in seconds using 3 proven equations — then see how your activity level, age and weight change your real daily calorie target.