Convert hormone lab results between US and UK measurement units. Bidirectional — enter either value and the other updates instantly.
Select a hormone, then enter a value in either the US or UK field — the other converts automatically.
| Hormone | US Unit | UK Unit | To convert US → UK | To convert UK → US |
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Our free hormone unit converter instantly converts blood test results between US and UK measurement units for 16 key hormones. Whether you need to convert testosterone ng/dL to nmol/L, oestradiol pg/mL to pmol/L, or any other hormone measurement, this hormone unit converter works in both directions with live results as you type.
This hormone unit converter is particularly useful for UK patients interpreting results from US-format reports, or for professionals comparing international reference ranges for TRT, HRT, perimenopause and performance monitoring.
The US and UK use different measurement systems for most hormone blood tests. The US typically uses mass-per-volume units (ng/dL, pg/mL), while the UK uses molar units (nmol/L, pmol/L). This hormone unit converter handles all conversions using molecularly accurate factor calculations — for example, testosterone ng/dL to nmol/L uses a conversion factor of 0.03467.
For comprehensive hormone optimisation guides, see our TRT UK guide, HRT for Women UK and perimenopause UK guide. Converting a figure is only useful once you have one. Optimised Lifestyle offers its own at-home and clinic blood tests, analysed by a CQC-registered, UKAS-accredited UK laboratory — including the Testosterone Blood Test (total and free testosterone, SHBG and Free Androgen Index) and the wider Male Hormone Blood Test. Results are your own laboratory numbers measured against standard reference ranges; no clinician reviews or comments on them. See also our guide to blood test to supplement.
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