Thyroid Calculator

Use this calculator to convert between different forms and units of thyroid hormone. Common synthetic, pure and natural dessicated forms are listed. The last section of the table provides input fields for a specified ratio of T3 to T4, and will give the dosages required for both the synthetic and pure forms. All dosages given are based on the "Grains" field at the beginning of the table, but editing any field will automatically update the rest to keep them in sync.

• 1st November 2024: Migrated to new web framework and fixed some buggy input/ugly styling.
• 13th March 2024: Removed the synthetic/pure distinction as it was confusing and unnecessary bloat.