BMR Calculator Calculate your Basal Metabolic Rate (BMR) - the number of calories your body burns at rest. Personal Information Gender Male Female Age (years) Unit System Metric (cm, kg) Imperial (ft/in, lbs) Height (cm) Weight (kg) BMR Formula Mifflin-St Jeor (Recommended) Harris-Benedict (Revised) Harris-Benedict (Original) Katch-McArdle (if you know body fat %)Calculate BMR Reset