BMI, or Body Mass Index, is a simple way to check if your weight is healthy for your height. It’s calculated using a formula that takes your weight and height into account. Essentially, it gives you a number that helps you understand if you're underweight, at a healthy weight, overweight, or obese. It’s not a perfect measure, but it’s a quick and easy way to get a general idea of your body’s health.
BMR, or Basal Metabolic Rate, is the amount of energy (or calories) your body needs to keep functioning while at rest. It’s like the number of calories your body would burn if you did nothing all day—just to keep your heart beating, your lungs breathing, and your organs working. Knowing your BMR helps you understand how many calories you need to maintain your current weight, which can be useful if you're planning to lose, gain, or maintain weight.