Body Mass Index (BMI)

Learn your body mass index (BMI).

How Can People Use Their BMI to Evaluate Their Bodies?

When it comes to adults and children, different methods are used to find out if weight is about right for height. Adults should learn their BMI. Not all adults who have a BMI in the range labeled “healthy” are at their most healthy weight.

  • Some may have lots of fat and little muscle.
  • A BMI above the healthy range is less healthy for most people; but it may be fine if someone has lots of muscle, a large body frame, and little fat.
  • The further one’s BMI is above the healthy range, the higher one’s weight-related risk. If a person’s BMI is above the healthy range, he or she may benefit from weight loss, especially if there are other health risk factors.
  • BMIs slightly below the healthy range may still be healthy unless they result from illness.

ИМТ факты *

*BMI facts medical author: Melissa Conrad Stöppler, MD

  • BMI stands for body mass index. BMI is calculated by a formula that takes into account both a person’s height and weight.
  • BMI is reported as weight in kilograms (kg) divided by height in meters squared (m2).
  • BMI is useful in classification of obesity, overweight, and healthy weight.
  • Obesity is generally defined as a BMI of 30 or greater, while healthy weight for adults refers to a BMI of at least 19 and less than 25.
  • A BMI of 40 or more is often used to identify people who are extremely obese and at risk for serious health complications of obesity.

What is BMI?

Body mass index, or BMI, is a new term to most people. However, it is the measurement of choice for many physicians and researchers studying obesity. BMI uses a mathematical formula that takes into account both a person’s height and weight. BMI equals a person’s weight in kilograms divided by height in meters squared (kg/m2).

What is a healthy weight?

It is important to understand what “healthy weight” means. Healthy weight is defined as a body mass index (BMI) equal to or greater than 19 and less than 25 among all people aged 20 or over. Generally, obesity is defined as a body mass index (BMI) equal to or greater than 30, which approximates 30 pounds of excess weight. Excess weight also places people at risk of developing serious health problems.

BMI chart for weight and height

The table below has already done the math and metric conversions. To use the table, find the appropriate height in the left-hand column. Move across the row to the given weight. The number at the top of the column is the BMI for that height and weight.

BMI
(kg/m2)
19 20 21 22 23 24 25 26 27 28 29 30 35 40
Height (in.) Weight (lb.)
58 91 96 100 105 110 115 119 124 129 134 138 143 167 191
59 94 99 104 109 114 119 124 128 133 138 143 148 173 198
60 97 102 107 112 118 123 128 133 138 143 148 153 179 204
61 100 106 111 116 122 127 132 137 143 148 153 158 185 211
62 104 109 115 120 126 131 136 142 147 153 158 164 191 218
63 107 113 118 124 130 135 141 146 152 158 163 169 197 225
64 110 116 122 128 134 140 145 151 157 163 169 174 204 232
65 114 120 126 132 138 144 150 156 162 168 174 180 210 240
66 118 124 130 136 142 148 155 161 167 173 179 186 216 247
67 121 127 134 140 146 153 159 166 172 178 185 191 223 255
68 125 131 138 144 151 158 164 171 177 184 190 197 230 262
69 128 135 142 149 155 162 169 176 182 189 196 203 236 270
70 132 139 146 153 160 167 174 181 188 195 202 207 243 278
71 136 143 150 157 165 172 179 186 193 200 208 215 250 286
72 140 147 154 162 169 177 184 191 199 206 213 221 258 294
73 144 151 159 166 174 182 189 197 204 212 219 227 265 302
74 148 155 163 171 179 186 194 202 210 218 225 233 272 311
75 152 160 168 176 184 192 200 208 216 224 232 240 279 219
76 156 164 172 180 189 197 205 213 221 230 238 246 287 328

Body weight in pounds according to height and body mass index.

Below is a table identifying the risk of associated disease according to BMI and waist size.

BMI Category Waist less than or equal to 40 in. (men) or 35 in. (women) Waist greater than 40 in. (men) or 35 in. (women)
18.5 or less Underweight N/A N/A
18.5 – 24.9 Normal N/A N/A
25.0 – 29.9 Overweight Increased High
30.0 – 34.9 Obese High Very High
35.0 – 39.9 Obese Very High Very High
40 or greater Extremely Obese Extremely High Extremely High

SOURCE:

Portions of the above information has been provided with the kind permission of the Partnership for Healthy Weight Management, www.consumer.gov). Last update May 8, 2007

Medically Reviewed by a Doctor on 12/5/2016

 

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