BMR and calorie targets are estimates. Actual energy needs vary with body composition, hormones, medical conditions, medications, training load, and daily movement. For pregnancy, eating disorders, or clinical nutrition planning, use professional guidance.
BMR Calculator FAQ
What is BMR?
BMR stands for basal metabolic rate. It is the approximate number of calories your body uses in a day at complete rest to support breathing, circulation, temperature regulation, and basic organ function.
What is the difference between BMR and TDEE?
BMR is your baseline energy use at rest. TDEE means total daily energy expenditure, which adds activity, exercise, and daily movement on top of BMR. If you want maintenance calories, TDEE matters more than BMR alone.
Which BMR formula is best?
Mifflin-St Jeor is usually the best starting point for most adults. Revised Harris-Benedict is another common estimate. Katch-McArdle is useful when you know your body-fat percentage because it calculates from lean body mass.
Can I use BMR for weight loss?
Yes, but BMR alone is not your eating target. Most people should use maintenance calories from the activity-adjusted result, then create a moderate calorie deficit for fat loss or a moderate surplus for muscle gain.
Why does the calculator show more than one result?
There is no single perfect formula for every body. A competitive BMR calculator should show the main formulas, maintenance calories by activity level, and practical calorie targets so you can use the estimate in training, dieting, or meal planning.
