Weight-based Levothyroxine Dose Calculator
Starting-dose estimator for treatment of primary hypothyroidism in adults.
Standard full replacement estimate: 1.6 mcg/kg/day.
Recommendation
Estimated starting levothyroxine dose
0 mcg/day
Closest common tablet strength:
Method:
Clinical notes:
- Typical adult full replacement dose:
1.6 mcg/kg/day. - Older adults or patients with heart disease generally start lower, often
12.5 to 25 mcg/day, then titrate. - Dose changes are commonly made in
12.5 to 25 mcgincrements every4 to 6 weeksbased on TSH and clinical response.
