There are several medically accepted criteria for defining morbid obesity. You are likely morbidly obese if you are:
- more than 100 lbs. over your ideal body weight, or
- have a Body Mass Index (BMI) of over 40, or
- have a BMI of over 35 and are experiencing severe negative health effects, such as high blood pressure or diabetes, related to being severely overweight
- unable to achieve a healthy body weight for a sustained period of time, even through medically supervised dieting
Select your gender, and then move the red slider handles or select your height and weight to calcluate your BMI. The results of the BMI calculations are displayed below. Note that these are approximate values, and are intended to be used only as a rough guide.
| Male | Female | |||
| Height | Ideal Weight | Height | Ideal Weight | |
| 4' 6" | 63 - 77 lbs. | 4' 6" | 63 - 77 lbs. | |
| 4' 7" | 68 - 84 lbs. | 4' 7" | 68 - 83 lbs. | |
| 4' 8" | 74 - 90 lbs. | 4' 8" | 72 - 88 lbs. | |
| 4' 9" | 79 - 97 lbs. | 4' 9" | 77 - 94 lbs. | |
| 4' 10" | 85 - 103 lbs. | 4' 10" | 81 - 99 lbs. | |
| 4' 11" | 90 - 110 lbs. | 4' 11" | 86 - 105 lbs. | |
| 5' 0" | 95 - 117 lbs. | 5' 0" | 90 - 110 lbs. | |
| 5' 1" | 101 - 123 lbs. | 5' 1" | 95 - 116 lbs. | |
| 5' 2" | 106 - 130 lbs. | 5' 2" | 99 - 121 lbs. | |
| 5' 3" | 112 - 136 lbs. | 5' 3" | 104 - 127 lbs. | |
| 5' 4" | 117 - 143 lbs. | 5' 4" | 108 - 132 lbs. | |
| 5' 5" | 122 - 150 lbs. | 5' 5" | 113 - 138 lbs. | |
| 5' 6" | 128 - 156 lbs. | 5' 6" | 117 - 143 lbs. | |
| 5' 7" | 133 - 163 lbs. | 5' 7" | 122 - 149 lbs. | |
| 5' 8" | 139 - 169 lbs. | 5' 8" | 126 - 154 lbs. | |
| 5' 9" | 144 - 176 lbs. | 5' 9" | 131 - 160 lbs. | |
| 5' 10" | 149 - 183 lbs. | 5' 10" | 135 - 165 lbs. | |
| 5' 11" | 155 - 189 lbs. | 5' 11" | 140 - 171 lbs. | |
| 6' 0" | 160 - 196 lbs. | 6' 0" | 144 - 176 lbs. | |
| 6' 1" | 166 - 202 lbs. | 6' 1" | 149 - 182 lbs. | |
| 6' 2" | 171 - 209 lbs. | 6' 2" | 153 - 187 lbs. | |
| 6' 3" | 176 - 216 lbs. | 6' 3" | 158 - 193 lbs. | |
| 6' 4" | 182 - 222 lbs. | 6' 4" | 162 - 198 lbs. | |
| 6' 5" | 187 - 229 lbs. | 6' 5" | 167 - 204 lbs. | |
| 6' 6" | 193 - 235 lbs. | 6' 6" | 171 - 209 lbs. | |
| 6' 7" | 198 - 242 lbs. | 6' 7" | 176 - 215 lbs. | |
| 6' 8" | 203 - 249 lbs. | 6' 8" | 180 - 220 lbs. | |
| 6' 9" | 209 - 255 lbs. | 6' 9" | 185 - 226 lbs. | |
| 6' 10" | 214 - 262 lbs. | 6' 10" | 189 - 231 lbs. | |
| 6' 11" | 220 - 268 lbs. | 6' 11" | 194 - 237 lbs. | |
| 7' 0" | 225 - 275 lbs. | 7' 0" | 198 - 242 lbs. | |