Tsh Dose Calculator
Calculate the recommended levothyroxine dose adjustment based on current TSH level and patient weight.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the TSH Dose Calculator
This tool calculates the recommended adjustment to your daily levothyroxine dose based on your current TSH, weight, and target TSH range.
- Enter Current TSH (mIU/L): Input your most recent TSH lab value (e.g., 8.5). Use a positive number.
- Enter Weight (kg): Input your body weight in kilograms (e.g., 70). This uses the metric system only.
- Select Target TSH: Choose your desired TSH range from the dropdown:
- Standard (0.5–2.5 mIU/L)
- Aggressive (0.3–1.5 mIU/L)
- Relaxed (0.5–3.5 mIU/L)
- Click "Calculate Dose Adjustment": The calculator will process your inputs.
- Read the Result: The output shows:
- The recommended dose change in mcg (increase, decrease, or no change).
- The new daily dose in mcg and mcg/kg/day.
- A formula explanation for transparency.
Note: Always consult your healthcare provider before adjusting medication. The calculator uses a standard base dose of 1.6 mcg/kg/day and adjusts by 25 mcg per 1 mIU/L TSH deviation from target.
Previous Results
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Frequently Asked Questions
A TSH dose calculator helps determine the appropriate adjustment to levothyroxine dosage based on a patient's current TSH level, weight, and target TSH range.
The calculator uses a base dose of 1.6 mcg/kg/day and adjusts by 25 mcg for every 1 mIU/L deviation from the target TSH.
This calculator is intended for healthcare professionals managing thyroid hormone replacement therapy. It provides estimates and should not replace clinical judgment.
