BMI & BMR Calculator

Body Mass Index & Metabolism

This BMI & BMR calculator is for anyone who wants quick, accurate numbers without the runaround. Use the form below to see your BMI:

  
Body Fat Calculator | Calorie Needs Calculator | Macro Split Calculator | Stopwatch Tool | Timer Tool

What is BMI and why does it matter?

BMI, or Body Mass Index, is a simple calculation using your height and weight. It’s a quick way to see if you’re in a healthy weight range for your height. The Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) both use BMI as a screening tool for weight categories that may lead to health problems.

BMI Categories: Underweight: <18.5 | Normal: 18.5–24.9 | Overweight: 25–29.9 | Obesity: 30+. These numbers are just a guide. BMI doesn’t know if you’re a bodybuilder or a couch potato, so don’t take it as gospel.

What about BMR and TDEE?

BMR (Basal Metabolic Rate) is the number of calories your body needs to function at rest. It’s the baseline for your daily calorie needs. TDEE (Total Daily Energy Expenditure) is your BMR multiplied by your activity level. If you want to lose, maintain, or gain weight, knowing your TDEE is key. For more, see the Mayo Clinic’s guide to metabolism.

Remember, these calculators are tools, not medical advice. For personalized guidance, talk to a healthcare professional.

A friendly illustration of a person and a weight scale, representing the BMI & BMR Calculator. It helps you understand your body mass and how many calories you burn just by existing.
A simple drawing of a torso with a measuring tape around the waist, symbolizing the Body Fat Calculator. It's a neat way to track your body fat percentage beyond just the scale.
An illustration of a stylized flame, representing the Calorie Needs Calculator. This tool helps you figure out your daily calorie needs to maintain, lose, or gain weight.
A colorful pie chart with icons for banana, chicken leg, and a drop, illustrating the Macro Split Calculator. It's designed to help you balance your protein, carbs, and fats for your dietary goals.
A friendly illustration of a stopwatch with motion lines, symbolizing the Stopwatch Tool. Perfect for timing your workouts, sprints, or even just your coffee breaks.
A cute illustration of a timer, representing the Timer Tool. Great for setting intervals for HIIT, Tabata, or just making sure you don’t burn your eggs!