Before you change how you eat, check where you stand today. It takes under 2 minutes and gives you two numbers that help you set a realistic goal instead of guessing.
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1 Calculate your BMI
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BMI = weight (kg) ÷ height (m) squaredExample: 160 cm, 56 kg → 56 ÷ (1.6 × 1.6) = 21.9
Below 18.5
Underweight
18.5–22.9
Healthy range
23.0–24.9
Overweight
25.0–29.9
Obese
30 and above
Severely obese
Cut-offs for Asian adults (WHO Asia-Pacific)
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2 Measure your waist
Stand straight, breathe out gently, and measure around your waist at navel level with the tape parallel to the floor.
📏Women80 cm or more
📏Men90 cm or more
At or above these numbers usually means a lot of belly fat, which is linked to a higher risk of chronic disease.
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3 Set a weight goal
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Target weight = desired BMI × height (m) squaredExample: at 160 cm, the healthy range (BMI 18.5–22.9) is about 47–59 kg. Aim for a range, not one exact number.
Good to know
ℹ️ BMI cannot tell muscle from fat, so very muscular people may score too high, and it does not suit children or pregnant women. Look at it together with your waist and how your body feels. If your BMI is below 18.5 or you have a medical condition, talk to a doctor before changing your diet.
In short: there is no best diet for everyone. Start by knowing where you begin, then choose what suits you.
General information for adults, not a medical diagnosis.