Free · Health · Body Measurements

Low BMI Threshold Calculator

Calculate current BMI and reference weights for BMI 18.5 and the historically cited 17.5 threshold.

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Calculator inputs

Enter your values

Result

Your calculation

Current BMI
24.2
Healthy weight
Weight at BMI 18.5
53.5 kg
Weight at BMI 17.5
50.6 kg

BMI cannot diagnose an eating disorder. If eating, weight, or body-image concerns are causing distress, seek support from a qualified health professional.

How to use this calculator

  1. Enter current measurements as accurately as practical.
  2. Calculate to see the estimate, range, and method details.
  3. Use the result as context, and discuss health decisions with a qualified clinician.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.