BMR Calculator

BMR (Basal Metabolic Rate) represents the minimum amount of energy your body needs to maintain vital functions at rest. It's the number of calories your body burns just to keep you alive - for breathing, circulation, cell production, and basic neurological functions.

This calculator uses the Mifflin-St Jeor equation, which is considered one of the most accurate formulas for estimating BMR. It takes into account your weight, height, age, and gender to provide a tailored estimate.

Men typically have higher BMR values than women because they generally have more muscle mass and less body fat. Muscle tissue requires more energy to maintain than fat tissue, resulting in higher caloric needs.

Your BMR is the baseline for understanding your energy requirements. The daily calorie needs calculation (which factors in your activity level) provides a more realistic estimate for maintaining your current weight. For weight loss, you'd typically consume fewer calories, and for weight gain, you'd consume more.

The Mifflin-St Jeor equation is accurate for most healthy adults, with an error rate of about ±10%. However, individual factors like body composition, genetics, and metabolism can affect actual BMR. Use this as a starting point and adjust based on your real-world results.