BMI for BMI for 5ft 5in, 120lbs is 20 — Normal weight
A BMI of 20 falls in the Normal weight range. Equivalent to 165cm and 54kg.
▶ Open full BMI calculatorWhat a BMI of 20 means
A BMI of 20 is within the healthy range (18.5–24.9). This is associated with the lowest risk of weight-related health conditions. To maintain this, the calorie calculator can help you find your daily energy needs.
BMI is a screening tool, not a diagnostic measure. It doesn't account for muscle mass — a muscular athlete may have a high BMI despite low body fat. For a more complete picture, combine BMI with your body fat percentage. The estimated body fat for this BMI is approximately 15% (Deurenberg formula, assumes male aged 30 — use the body fat calculator for personalised results).
The WHO healthy BMI range (18.5–24.9) applies to adults of all ethnicities, though some health bodies recommend lower thresholds for people of Asian descent. Always discuss your results with a qualified healthcare provider.
Frequently asked questions
Is a BMI of 20 healthy?+
A BMI of 20 is classified as Normal weight. This is within the healthy range (18.5–24.9) and is associated with the lowest risk of weight-related health conditions.
What is the ideal weight for 5ft 5in?+
For a height of 5ft 5in, the healthy weight range (BMI 18.5–24.9) is 50–68kg (110–150lbs). This range is associated with the lowest health risk according to WHO standards. Note that "ideal" weight varies by individual — muscle mass, bone density, age, and ethnicity all affect what's healthy for a specific person.
How accurate is BMI?+
BMI is a useful population-level screening tool but has individual limitations. It doesn't distinguish between fat and muscle mass — a muscular person may have a high BMI despite having low body fat. It also doesn't account for fat distribution (abdominal fat is more associated with health risk than overall BMI). Use BMI alongside waist circumference and body fat percentage for a more complete picture.