Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest.
Mifflin-St Jeor Equation:
• Men: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age + 5
• Women: BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age - 161