BMR Calculator
Calculate your Basal Metabolic Rate using multiple scientific formulas
Personal Information
BMR Calculator Information
What is BMR?
Basal Metabolic Rate is the number of calories your body needs to maintain basic physiological functions while at rest.
BMR vs RMR
BMR is measured under strict conditions, while RMR (Resting Metabolic Rate) is measured under less restrictive conditions and is typically 10-20% higher.
Formula Accuracy
Mifflin-St Jeor is considered most accurate for the general population. Katch-McArdle is best if you know your body fat percentage.
Factors Affecting BMR
Age, gender, body composition, genetics, hormones, and environmental temperature all influence your metabolic rate.