Mifflin-St. Jeor Calculator

This calculator estimates how many calories you need each day based on your age, gender, weight, height, and activity level.

It’s a simple, science-backed way to understand your daily energy needs, whether your goal is to maintain, lose, or gain weight. This tool helps you make more informed choices about your diet and fitness.

Basal Metabolic Rate (BMR): BMR is the number of calories your body needs at rest to maintain basic functions like breathing, circulation, and cell production. It’s the minimum energy your body requires to keep you alive and functioning, even if you were lying down all day.

Total Daily Energy Expenditure (TDEE): TDEE represents the total calories you burn in a day, including your BMR plus the energy used for all your activities, from exercise to simple daily tasks. Knowing your TDEE can help you understand how many calories you need to maintain, lose, or gain weight based on your lifestyle.