Body Mass Index (BMI) is a calculation that (allegedly) tells you if you're underweight, normal weight, overweight, or obese.
BMI is a weight-to-height ratio that's used to categorize people by body mass.
You get your BMI by dividing your weight in kilograms by your height in meters squared.
But here's the thing: BMI wasn't developed to assess individuals' health or even their body fat.
BMI's most obvious limitation is that it can't discriminate between body mass that comes from muscle and body mass that comes from fat.
What makes BMI useful for looking at population trends makes it a pretty poor choice for evaluating individuals.
A better way for you to get some potentially useful health-related info about body fat is to measure your waist circumference.
But that said, you can't get a complete picture of someone's health from BMI or body fat alone.
For example, when doctors assess cardiac risk, they're not looking just at your weight.
And if you're happy and healthy, there's no medical reason to lose weight.
When it comes to clinical weight management and obesity treatment, there actually is a newer tool that seems to be better and more holistic than BMI.
In conclusion, unless you're conducting a study about weight trends in large populations, feel free to disregard BMI, which can be a total life ruiner.