Weight Based Levothyroxine Calculator

Levothyroxine Dose Calculator

Levothyroxine is a synthetic thyroid hormone used to treat hypothyroidism. The dosage of Levothyroxine is often based on the patient’s weight, age, and severity of hypothyroidism. Here is a table summarizing the typical starting doses based on weight for adults:

Weight (kg)Weight (lbs)Starting Dose (µg/day)
45-54100-11950-75
55-64120-13975-100
65-74140-159100-125
75-84160-179125-150
85-94180-199150-175
95-104200-229175-200
105+230+200+

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