Not just the number. The weight that moves you a category, and how close you are.
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BMI is a blunt instrument, and it knows nothing about you. It's height and weight. That's the whole formula. It can't tell muscle from fat, so it calls plenty of athletes obese; it doesn't see where you carry weight, which is the part that actually matters for health; and it behaves differently across ages and ethnicities. It's a rough population screen, useful mostly for watching your own number move. It is not a diagnosis and not medical advice.
Your weight in kilograms divided by your height in meters, squared. The calculator converts pounds, feet and inches for you.
The healthy range for your height, and the weight that moves you into the next category down, so you can see how close you are.
No. It is a simple ratio of weight to height and does not account for muscle, age or body shape. It is one number among many.
Tirzing tracks your BMI off every weigh-in, alongside body measurements, which catch what BMI can't: the weeks the scale sits still and your waist doesn't.