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What is Body Mass Index (BMI) ?

Many doctors use a height/weight system known as the "Body Mass Index" (BMI) as a rough guide to determine whether someone is of average weight, overweight or obese. BMI can be calculated by dividing your weight in kilogram by square of your height in meters. BMI ranges slightly differ for men and women. BMI values signify underweight, ideal weight, overweight, or obese.



BMI can be calculated by dividing your weight in kilogram by the square of your height in meters.

BMI = Weight in kilogram
           (height in m)2

Although BMI is a good indicator for determining overweight or obesity in most people, however, it does not take body composition (frame size or body fat and lean muscle mass ratios) into account. Hence, a person in good shape with low body fat and high lean muscle mass may be overweight on BMI values, while another person with high body fat percentage and normal weight may be in the healthy range on the basis of BMI values.

From the following table you can calculate your BMI value. The table also gives BMI ranges and their significances. BMI values can signify underweight, normal weight, overweight, or obese.

BMI Calculator

Your Weight (lbs.)

         Weight & Height Conversion

Your Height (in)

Your BMI

Your Risk

BMI Value Ranges

nbsp;                 BMI Range

nbsp;    Women

nbsp;     Men

     Your Weight & Health Risk

BMI Less than 19.0

BMI Less than 20.5

Underweight.

19.1 to 25.8

20.8 to 26.5

Normal weight, very low risk

25.8 to 27.5

26.5 to 27.8

Slightly overweight, some risk

27.5 to 32.2

27.8 to 31.0

Overweight. moderate risk

32.5 to 44.8

31.0 to 45.5

Severe overweight, high risk

Greater than 44.8

Greater than 45.4

Obesity, very high risk

Table of Body Mass Index

To use the table, find the appropriate height in the left-hand column labeled Height. Move across to a given weight. The number at the top of the column is the BMI at that height and weight. Pounds have been rounded off.

BMI1920212223242526272829303132333435
Ht
(in)
Body Weight (pounds)
589196100105110115119124129134138143148153158162167
599499104109114119124128133138143148153158163168173
6097102107112118123128133138143148153158163168174179
61100106111116122127132137143148153158164169174180185
62104109115120126131136142147153158164169175180186191
63107113118124130135141146152158163169175180186191197
64110116122128134140145151157163169174180186192197204
65114120126132138144150156162168174180186192198204210
66118124130136142148155161167173179186192198204210216
67121127134140146153159166172178185191198204211217223
68125131138144151158164171177184190197203210216223230
69128135142149155162169176182189196203209216223230236
70132139146153160167174181188195202209216222229236243
71136143150157165172179186193200208215222229236243250
72140147154162169177184191199206213221228235242250258
73144151159166174182189197204212219227235242250257265
74148155163171179186194202210218225233241249256264272
75152160168176184192200208216224232240248256264272279
76156164172180189197205213221230238246254263271279287


BMI36373839404142434445464748495051525354
Height
(inches)
Body Weight (pounds)
58172177181186191196201205210215220224229234239244248253258
59178183188193198203208212217222227232237242247252257262267
60184189194199204209215220225230235240245250255261266271276
61190195201206211217222227232238243248254259264269275280285
62196202207213218224229235240246251256262267273278284289295
63203208214220225231237242248254259265270278282287293299304
64209215221227232238244250256262267273279285291296302308314
65216222228234240246252258264270276282288294300306312318324
66223229235241247253260266272278284291297303309315322328334
67230236242249255261268274280287293299306312319325331338344
68236243249256262269276282289295302308315322328335341348354
69243250257263270277284291297304311318324331338345351358365
70250257264271278285292299306313320327334341348355362369376
71257265272279286293301308315322329338343351358365372379386
72 265 272 279 287 294 302 309 316 324 331 338 346 353 361 368 375 383 390 397
73 272 280 288 295 302 310 318 325 333 340 348 355 363 371 378 386 393 401 408
74 280 287 295 303 311 319 326 334 342 350 358 365 373 381 389 396 404 412 420
75287295303 311 319327335343351359367375383391399407415423431
76 295304312320328336344353361369377385394402410418426435443

People with an increased BMI are at increased risk of stroke, heart disease, type-2 diabetes and several types of cancers.

You should start losing weight if your BMI is 30 or greater, or your BMI is 25 and you have two or more weight related health problems, or your waist circumference is more than 40 inches (for men) and 35 inches (for women), and you have two or more weight related health problems.

Note that because BMI value ranges are based on adult heights so the BMI calculations are not valid for children and teens. These values are also not valid for pregnant and nursing women, and people over 65, because they need more fat reserves than usual. If your BMI number is more than 1-2 points above your "ideal" range it Is certain you will benefit greatly by losing weight and eliminating excess body fat.

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