Searching for a BMI calculator Malaysia is usually a search for the lower cut-offs, not for a different formula. The arithmetic is the same as on the main BMI calculator: kilograms divided by metres squared. What changes is the sentence next to the number. International charts drawn from the World Health Organization call 18.5 to 24.9 a healthy weight and start obesity at 30. Adult screening charts used in Malaysian clinics commonly call 18.5 to 22.9 normal, 23 to 27.4 overweight, and 27.5 or above obese. A person at 24 can be told they are fine on one poster and overweight on the other. This page calculates the figure once and prints both names.
Those lower lines are not a Malaysian invention and they are not a guess. In 2004 a WHO expert consultation reported that diabetes and cardiovascular risk in several Asian populations rise at a BMI below the international overweight line. The practical screening bands that came out of that work are the ones above: risk starts to be discussed from 23, and the obese label from 27.5. Malaysian primary-care materials have used that pattern for years. Some public pages still print 25 and 30, because those remain the WHO international bands. If your clinic letter uses a different split, trust the letter and use this page for the number. The cut-offs here are the common screening set, not a claim that every hospital form in the country is identical this year.
The form accepts kilograms and centimetres, which is how a Malaysian clinic weighs you, or pounds with feet and inches. Height is centimetres. 165 cm is not 1.65 in the height box. Weight between 15 and 350 kg and height between 90 and 250 cm are the limits, so a slipped decimal is rejected instead of producing a BMI of 2000. The result is one decimal. The category uses the full value, so a BMI of 22.96 is already in the Asian overweight band even if a rounded display ever looked like 23.0. Exactly 23.0 is overweight on the Asian chart and healthy on the WHO chart. Exactly 27.5 is obese on the Asian chart and still overweight on the WHO chart until 30.
Worked examples for the range that causes the arguments. 55 kg and 160 cm is 21.5, normal on both charts. 62 kg and 160 cm is 24.2, WHO healthy and Asian overweight. 72 kg and 162 cm is 27.4, still under the Asian obese line and inside WHO overweight. 75 kg and 165 cm is 27.5, Asian obese and WHO overweight. 90 kg and 170 cm is 31.1, obese on both, WHO class I. Underweight is shared: below 18.5 on each chart. None of these examples is advice about what you should weigh. They are checks that the labels move where the text says they move.
What the chart does not know is the rest of a person. It does not know waist, blood pressure, fasting glucose, fitness, or whether the weight is muscle. It is the wrong tool in pregnancy and the wrong tool for a child, because a child's BMI is read against an age chart. Athletes who carry a lot of muscle get a high BMI without the meaning the word obese usually has. Use the number as the clinic would use a first screen, then stop. This site does not store it, does not ask for a name, and does not turn it into a meal plan.
If you only needed the units, the kilograms to pounds converter and the centimetres to inches converter use the same definitions this calculator uses before it divides. The main BMI calculator is this form with the international explanation first. Either page will show both bands.