Free BMR Calculator-Find Your Basal Metabolic Rate

Discover your body's unique energy needs with our advanced Basal Metabolic Rate (BMR) calculator. Your BMR is the number of calories your body needs to perform basic, life-sustaining functions at rest. Knowing this number is the first step in creating an effective diet and fitness plan. Our tool also calculates your Total Daily Energy Expenditure (TDEE) to show you how many calories you burn based on your activity level.

How to Use the BMR Calculator

Get a detailed estimate of your metabolic rate in seconds:

1. Select Your Units: Choose between Metric (kg, cm) or US/Imperial (lbs, ft, in).
2. Enter Your Details: Provide your age, gender, height, and weight.
3. Choose a Formula: The Mifflin-St Jeor formula is considered the most accurate and is selected by default. You can also choose other established formulas.
4. Click "Calculate BMR": Instantly see your BMR and a full table of your daily calorie needs.

What is BMR and TDEE?

• Basal Metabolic Rate (BMR): This is the minimum number of calories your body requires to function while at complete rest—think of it as the energy needed to keep your organs running if you were to lie in bed all day.
• Total Daily Energy Expenditure (TDEE): This is a more practical number. It takes your BMR and multiplies it by an activity factor to estimate the total number of calories you burn in a typical day, including exercise and other movements. This is the number you should use as a baseline to maintain your current weight.

Understanding the BMR Formulas

Different formulas have been developed over the years to estimate BMR. Our calculator includes the most recognized ones:

• Mifflin-St Jeor Equation: Created in the 1990s, this is widely considered the most accurate and reliable BMR formula for the general population. It is the recommended choice for most users.
• Revised Harris-Benedict Equation: An updated version of the original 1919 formula, it was the standard for many years but can be slightly less accurate than Mifflin-St Jeor.
• Katch-McArdle Formula: This formula is different as it calculates BMR based on your lean body mass. It can be very accurate if you know your body fat percentage, making it popular with athletes and fitness enthusiasts.

Disclaimer: This calculator provides an estimate for informational purposes. Individual metabolic rates can vary. For personalized health and nutrition advice, please consult a registered dietitian or healthcare provider.