TSH: units, conversion and tracking
Updated
Short answer
TSH is reported in mIU/L and µIU/mL. µIU/mL and mIU/L are numerically identical.
Convert TSH
Enter a value to see the converted result.
Converts units only and does not interpret a result. For other markers, use the full unit converter.
What is TSH?
Thyroid-stimulating hormone is the pituitary signal that tells the thyroid gland how much hormone to make.
BiomarkerHQ groups TSH under Thyroid. On lab reports it can also appear as thyroid stimulating hormone, thyrotropin and tsh 3rd generation.
TSH units and conversion
BiomarkerHQ stores each TSH result in the unit printed on the report, and charts and compares results in mIU/L.
µIU/mL and mIU/L are numerically identical, so a result keeps its number when you change between them.
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Tracking TSH over time
In BiomarkerHQ, each TSH result is saved with its collection date, its unit and the reference range printed on that report. The timeline charts the results across your draws against the range from each of your own reports, and any two draws can be compared side by side.
- Keep the unit printed on each report. Convert only to compare.
- Keep each report's own range with its result. See why ranges differ between labs.
- Compare the same lab and conditions where you can. See how to compare two blood tests.
Frequently asked questions
Which units do labs report TSH in?
TSH is reported in mIU/L and µIU/mL. BiomarkerHQ stores each result in the unit printed on the report and uses mIU/L for charts and comparisons.
Does TSH change when I convert it from µIU/mL to mIU/L?
No. µIU/mL and mIU/L are numerically identical, so the number stays the same.
Does BiomarkerHQ interpret my TSH result?
No. It compares a result only with the reference range printed on your own lab report, as below, within or above, and does not say what the result means. Talk to a qualified clinician about your results.
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