The universally accepted measure of obesity is by Body Mass Index (BMI) which is your weight in kg divided by the square of your height in meter. 

The following weight tables show 5 categories of weights according to different sexes and heights:

Under weight = below 20 (men) or below 18.7 (women)

Normal body weight = 20-25 (men) or 18.7-23.8 (women)

Mildly overweight = BMI 25-30 (men) or 23.8-28.6 (women)

Moderately overweight = BMI 30-40 (men) or 28.6-36 (women)

Grossly or severely overweight = BMI more than 40 (men) or more than 36 (women)