Endocrinology · Internal Medicine
Weight-based Levothyroxine Dose calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
lb
Allowed range: 66.14–440.92 lb
Quick picks
µg/kg
Allowed range: 0.5–2 µg/kg
Quick picks
Result
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Clinical inputs
- Body weight (kg)Accepted range: 30 to 200
- µg per kg (µg/kg)Accepted range: 0.5 to 2
Primary source
Jonklaas J et al. Guidelines for the treatment of hypothyroidism. Thyroid. DOI: 10.1089/thy.2014.0028. PMID: 25266247. Scope: Full replacement often =1.6 µg/kg daily in otherwise healthy adults (weight×µg/kg product). (2014)
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