Free BMR Calculator

Your Basal Metabolic Rate (BMR) is the number of calories your body burns every day just to keep you alive. Even if you stayed in bed all day, your body would still need energy to breathe, circulate blood, regulate body temperature, and keep your organs functioning.

Use our free BMR Calculator to estimate your daily resting calorie needs using the scientifically validated Mifflin-St Jeor equation, one of the most accurate formulas for most adults.

What Is BMR?

Basal Metabolic Rate represents the minimum amount of energy your body requires at complete rest. It does not include calories burned through walking, exercising, working, or any other daily activities.

Knowing your BMR is the first step toward understanding your calorie needs.

BMR vs TDEE

Many people confuse BMR and TDEE (Total Daily Energy Expenditure).

BMR = Calories burned at complete rest.

TDEE = BMR plus all daily activity, exercise, and movement.

If your goal is weight loss, muscle gain, or maintenance, you’ll ultimately want to calculate your TDEE, but everything starts with your BMR.

Is This Calculator Accurate?

This calculator uses the Mifflin-St Jeor equation, which is widely regarded as one of the most accurate methods for estimating BMR in healthy adults. However, it remains an estimate. Your actual calorie expenditure may vary depending on body composition, genetics, hormones, and overall health.

What Should You Do After Calculating Your BMR?

Your BMR is only a starting point. To build an effective nutrition or training plan, you also need to consider:

• Your daily activity level

• Training freq

• uency

• Goal (fat loss, muscle gain, maintenance)

• Progress over time

That’s exactly what TheBean.ai fitness ai does. Instead of giving you a single number, it learns from your workouts, progress, and goals to provide personalised coaching that adapts as you improve.