Obesity can put you at a greater risk for health conditions like type 2 diabetes, high blood pressure, joint problems, and gallstones, according to the Centers for Disease Control and Prevention (CDC). But it’s more than just your weight that matters. What BMI is really a stand-in for isn’t actually how your weight stacks up, but whether you’re carrying excess body fat and where on your body you’re carrying it. That’s what really makes a difference when it comes to the threat on your health, he says.

To find your BMI, you calculate your weight in kilograms divided by your height in meters squared. You can avoid doing the calculation yourself by plugging your stats into an online calculator, like the one from the CDC.

After finding your number, here’s where you fall:

BMI 18.5 to 24.9: normal weight

BMI 25 to 29.9: overweight

BMI 30 and higher: obesity

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