Thyroid unit converter
Labs in the UK use SI units (pmol/L). US labs use conventional units (ng/dL, pg/mL). If you've seen both and want to compare them - type on either side.
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Thyroid Stimulating Hormone
TSHSame number in both - these units are equivalent, only the label differs.
Free T4
FT4pmol/L × 0.0777 = ng/dL
Free T3
FT3pmol/L × 0.651 = pg/mL
Reverse T3
rT3Same number in both - these units are equivalent, only the label differs.
Thyroglobulin
TgSame number in both - these units are equivalent, only the label differs.
Why aren't antibodies listed here?
Antibody tests TRAb, TPOAb, TgAb are measured differently by each lab and assay - there is no universal conversion factor. Read your result against the reference range printed on your own report.
These tools help you record and make sense of your own information - they don't diagnose, monitor or interpret anything, and they aren't a substitute for medical advice. Where a tool shows a reference range, that is the range from your own lab report, not ours. Everything you enter stays on your device; we never see it. Take what you record to your GP or clinician - only they can tell you what it means for you.