If you are unable to use our BMI calculator, or if you are interested in how BMI is calculated, this page has the mathematical BMI Formula.
English BMI Formula (Imperial)
BMI = (Weight in Pounds / (Height in inches x Height in inches)) x 703
Metric BMI Formula
BMI = (Weight in Kilograms / (Height in Meters x Height in Meters))
Note that for children, you should check the BMI value on a BMI-for-age percentiles growth chart, which compares the result with other children of the same age and sex to determine the BMI percentile.
For example, a BMI percentile of 60 means that the child's weight is higher than 60% of all children of the same age and gender.
Now that you know your BMI, you can determine if you're at risk for BMI related disease.
Another way to determine your healthy weight range is by looking at the table below:
| Height | Normal (BMI under 25) | Overweight (BMI under 30) | Obese (BMI 30+) |
|---|---|---|---|
| 4' 10" | 91 to 118 lbs. | 119 to 142 lbs. | 143 to 186 lbs. |
| 4' 11" | 94 to 123 lbs. | 124 to 147 lbs. | 148 to 193 lbs. |
| 5' | 97 to 127 lbs. | 128 to 152 lbs. | 153 to 199 lbs. |
| 5' 1" | 100 to 131 lbs. | 132 to 157 lbs. | 158 to 206 lbs. |
| 5' 2" | 104 to 135 lbs. | 136 to 163 lbs. | 164 to 213 lbs. |
| 5' 3" | 107 to 140 lbs. | 141 to 168 lbs. | 169 to 220 lbs. |
| 5' 4" | 110 to 144 lbs. | 145 to 173 lbs. | 174 to 227 lbs. |
| 5' 5" | 114 to 149 lbs. | 150 to 179 lbs. | 180 to 234 lbs. |
| 5' 6" | 118 to 154 lbs. | 155 to 185 lbs. | 186 to 241 lbs. |
| 5' 7" | 121 to 158 lbs. | 159 to 190 lbs. | 191 to 249 lbs. |
| 5' 8" | 125 to 163 lbs. | 164 to 196 lbs. | 197 to 256 lbs. |
| 5' 9" | 128 to 168 lbs. | 169 to 202 lbs. | 203 to 263 lbs. |
| 5' 10" | 132 to 173 lbs. | 174 to 208 lbs. | 209 to 271 lbs. |
| 5' 11" | 136 to 178 lbs. | 179 to 214 lbs. | 215 to 279 lbs. |
| 6' | 140 to 183 lbs. | 184 to 220 lbs. | 221 to 287 lbs. |
| 6' 1" | 144 to 188 lbs. | 189 to 226 lbs. | 227 to 295 lbs. |
| 6' 2" | 148 to 193 lbs. | 194 to 232 lbs. | 233 to 303 lbs. |
| 6' 3" | 152 to 199 lbs. | 200 to 239 lbs. | 240 to 311 lbs. |
| 6' 4" | 156 to 204 lbs. | 205 to 245 lbs. | 246 to 320 lbs. |