Calculate your BMI

Many people have the impression that they are overweight, but they don’t actually know what the ‘norm’ is. Are you just on the heavy side or are you really obese? Find out by calculating your BMI. Age also plays a role in children, find out whether your child is simply overweight or suffers from serious obesity.

How do you calculate your BMI?

You calculate your BMI (Body Mass Index) as follows:

• You take your height. For example 1.85
• Take the square of this: 1.85 x 1.85 = 3.4225
• Then take your weight. For example 90 kilos.
• Divide the weight by the square of the height, so: 90: 3.4225 = 26 Your BMI is then 26

 

Underweight:

If you have a BMI between 10 and 18.5, you are underweight.

Normal healthy weight:

If you have a BMI between 18.5 and 25, you have a normal healthy weight.

Overweight:

If you have a BMI between 25 and 30, you are overweight, but this excess weight does not lead to any risks.

Obesity:

If you have a BMI between 30 and 40, you are obese and we call it obesity. Obesity increases the risk of diabetes, cardiovascular disease, and joint problems. With a BMI between 30 and 40 you run an increased health risk.

Morbid Obesity:

If you have a BMI over 40 you have Morbid Obesity and your health is at risk.

Things are different for children and age also plays a role:

BMI in boys

Age	Underweight (BMI less than)	BMI at healthy weight	BMI for overweight	Severely overweight (BMI more than)
6	14.04	14.04-17.55	17.55-19.78	19.78
7	14.02	14.02-17.92	17.92-20.63	20.63
8	14.10	14.10-18.44	18.44-21.60	21.60
9	14.49	14.29-19.10	19.10-22.77	22.77
10	14.53	14.53-19.84	19.84-24.00	24.00
11	14.84	14.84-20.55	20.55-25.10	25.10
12	15.23	15.23-21.22	21.22-26.02	26.02
13	15.70	15.70-21.91	21.91-26.84	26.84
14	16.25	16.25-22.62	22.62-27.63	27.63
15	16.84	16.84-23.29	23.29-28.30	28.30
16	17.42	17.42-23.90	23.90-28.88	28.88
17	17.98	17.98-24.46	24.46-29.41	29.41
18	18.50	18.50-25.00	25.00-30.00	30.00

 

BMI in girls

Age	Underweight (BMI less than)	BMI at healthy weight	BMI for overweight	Severely overweight (BMI more than)
6	13.90	13.90-17.34	17.34-19.65	19.65
7	13.94	13.94-17.75	17.75-20.51	20.51
8	14.06	14.06-18.35	18.35-21.57	21.57
9	14.26	14.26-19.07	19.07-22.81	22.81
10	14.57	14.57-19.86	19.86-24.11	24.11
11	14.99	14.99-20.74	20.74-25.42	25.42
12	15.52	15.52-21.68	21.68-26.67	26.67
13	16.13	16.13-22.58	22.58-27.76	27.76
14	16.73	16.73-23.34	23.34-28.57	28.57
15	17.28	17.28-23.94	23.94-29.11	29.11
16	17.75	17.75-24.37	24.37-29.43	29.43
17	18.16	18.16-24.70	24.70-29.69	29.69
18	18.50	18.50-25.00	25.00-30.00	30.00