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    BMI of 18 — What Does It Mean?

    "BMI Meaning" Calculator
    What does BMI of
    mean

    BMI of 18 — is it good or bad?

    Answer

    BMI 18 for Males and Females means
    Underweight/Mild thinness

    WHO adult scale (18+) · not for pregnancy · the same cut-offs for women and men · BMI does not tell muscle from fat

    UnderHealthyOverObese
    18.5
    25
    30
    35
    40
    18
    1445
    ↑ BMI

    0.5 below the healthy range (18.5 ≤ BMI < 25)

    WHO BMI categories (adults)

    BMIWeight Category
    BMI < 16Underweight/Severe thinness
    16 ≤ BMI < 17Underweight/Moderate thinness
    17 ≤ BMI < 18.5Underweight/Mild thinness
    18.5 ≤ BMI < 25Normal/Healthy Weight
    25 ≤ BMI < 30Overweight/Pre-obese
    30 ≤ BMI < 35Obese/Class I
    35 ≤ BMI < 40Obese/Class II
    BMI ≥ 40Morbid Obesity/Class III

    Screening, not a diagnosis. Children and teenagers 5–19 are read against WHO BMI-for-age; for many Asian populations WHO names lower action points, 23 and 27.5. Who the BMI scale applies to ↗ · sources: WHO, pregnancy — NHS

    BMI 18 at common heights

    cm · kgft/in · lbs
    150 cm · 40.5 kg
    ≈ 41 kg · BMI 18.22    		4'11" · 89.1 lbs
    ≈ 89 lbs · BMI 17.97
    155 cm · 43.2 kg
    ≈ 43 kg · BMI 17.9    		5'1" · 95.3 lbs
    ≈ 95 lbs · BMI 17.95
    160 cm · 46.1 kg
    ≈ 46 kg · BMI 17.97    		5'3" · 101.6 lbs
    ≈ 102 lbs · BMI 18.07
    165 cm · 49 kg5'5" · 108.2 lbs
    ≈ 108 lbs · BMI 17.97
    170 cm · 52 kg5'7" · 114.9 lbs
    ≈ 115 lbs · BMI 18.01
    175 cm · 55.1 kg
    ≈ 55 kg · BMI 17.96    		5'9" · 121.9 lbs
    ≈ 122 lbs · BMI 18.01
    180 cm · 58.3 kg
    ≈ 58 kg · BMI 17.9    		5'11" · 129.1 lbs
    ≈ 129 lbs · BMI 17.99
    185 cm · 61.6 kg
    ≈ 62 kg · BMI 18.12    		6'1" · 136.4 lbs
    ≈ 136 lbs · BMI 17.94
    190 cm · 65 kg6'3" · 144 lbs

    ft/in — nearest inch to the height in cm; the weight is computed for that inch.

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    What does BMI of 18 mean?. BMI of 18 means Underweight/Mild thinness for males and females. Find out if 18 BMI is underweight, normal, overweight, or obese on the WHO scale.
    https://calculat.io/en/weight/what-bmi-mean/18/generated.jpgCopy

    BMI Table

    BMICategory
    16.5Underweight/Moderate thinness
    16.6Underweight/Moderate thinness
    16.7Underweight/Moderate thinness
    16.8Underweight/Moderate thinness
    16.9Underweight/Moderate thinness
    17Underweight/Mild thinness
    17.1Underweight/Mild thinness
    17.2Underweight/Mild thinness
    17.3Underweight/Mild thinness
    17.4Underweight/Mild thinness
    17.5Underweight/Mild thinness
    17.6Underweight/Mild thinness
    17.7Underweight/Mild thinness
    17.8Underweight/Mild thinness
    17.9Underweight/Mild thinness
    18Underweight/Mild thinness
    18.1Underweight/Mild thinness
    18.2Underweight/Mild thinness
    18.3Underweight/Mild thinness
    18.4Underweight/Mild thinness
    18.5Normal/Healthy Weight
    18.6Normal/Healthy Weight
    18.7Normal/Healthy Weight
    18.8Normal/Healthy Weight
    18.9Normal/Healthy Weight
    19Normal/Healthy Weight
    19.1Normal/Healthy Weight
    19.2Normal/Healthy Weight
    19.3Normal/Healthy Weight
    19.4Normal/Healthy Weight
    Recalculate with different values ↑

    FAQ

    BMI of 18 — is it good or bad?

    BMI 18 for Males and Females means Underweight/Mild thinness

    Is BMI of 18 dangerous?

    BMI of 18 falls into the "Underweight/Mild thinness" category. A BMI below 18.5 may indicate insufficient body weight. Consult a healthcare professional for personalized advice.

    What weight gives a BMI of 18?

    BMI is weight divided by height in metres squared, so it names a weight only once the height is fixed: at 170 cm (5 ft 7 in) a BMI of 18 means about 114.6 lb (52 kg). A taller person reaches the same BMI at a proportionally higher weight.

    Does a BMI of 18 mean the same for men and women?

    Yes — the WHO adult scale has no separate cut-offs by sex, so a BMI of 18 reads as "Underweight/Mild thinness" for both. Age is what changes it: the adult table starts at 18, while children and teenagers aged 5–19 are compared with age- and sex-specific reference values instead.

    See Also