The question I hear after almost every blood test: "so… is my number normal?" It sounds like it should have a one-line answer. It doesn't — because "normal" depends on which lab ran your sample, which decade of life you're in, and on the difference between a reference range and a level that actually needs attention. Those are three different things, and confusing them is how men end up either falsely reassured or needlessly worried.
So here's the thing I wished existed every time I explain this: the published adult male testosterone ranges from New Zealand's laboratories, side by side, checked against each lab's own current documentation — and then what the numbers actually mean.
Every published NZ testosterone range, in one place
All figures are total testosterone in nmol/L, taken from each laboratory's published test guide or reference-interval document (checked 1 September 2026 — the linked guides in the references are always the source of truth).
| Laboratory | Who it serves | Adult male reference range (nmol/L) |
|---|---|---|
| LabPLUS (Te Toka Tumai, Auckland City Hospital) | Auckland hospital and referred testing | 20–50 yrs: 8.7–29 · over 50: 6.7–26 |
| Awanui Labs | Community testing across much of NZ | 20–50 yrs: 8.7–29 · over 50: 6.7–26 |
| Canterbury Health Laboratories | Canterbury | 15–50 yrs: 8.6–29 · over 50: 6.7–26 |
| Te Whatu Ora Waikato laboratory | Waikato | Adult male: 9–30 |
Two footnotes worth having. For younger men, LabPLUS and Awanui both publish a 15–19 year band of 7.6–28 nmol/L. And not every lab publishes ranges online at all — Pathlab in the Bay of Plenty, for instance, points requesters to the RCPA manual rather than listing numbers on its site — which is part of why I've collected the ones that do.
Why the ranges all look nearly identical
That sameness isn't a coincidence. Every lab in the table runs testosterone on the same family of Roche electrochemiluminescence immunoassays — LabPLUS states the Roche testosterone II kit on a Cobas e801, Canterbury and Waikato both cite Roche Cobas platforms, and in September 2024 Awanui standardised its routine testing on the Roche Elecsys Testo II assay. Awanui also noted in September 2024 that it was then the only laboratory in New Zealand offering testosterone by LC-MS/MS — the heavyweight reference method — which stays reserved for specialist situations rather than routine checks.
For you, the practical consequence is good news: an 8.7–29 in Auckland means essentially the same thing as an 8.6–29 in Christchurch. If you're comparing results from different NZ labs a few months apart, you're comparing like with like — something men in many other countries can't assume.
What a "normal range" actually is — and isn't
A reference range is a piece of statistics, not a verdict. It's constructed to cover roughly the middle 95% of results from a reference population — which means, by design, a small percentage of completely healthy men sit below the bottom number, and being inside the range is not a certificate that everything is fine.
The range also isn't a treatment threshold. That's a separate, clinical judgement — and in New Zealand there's specific guidance on it.
The numbers that matter clinically
BPAC, the NZ primary-care guidance body, updated its testosterone guidance in November 2024, and its framing is more useful than any single range:
- The likelihood of symptoms begins to increase with testosterone below about 12 nmol/L, and rises substantially below about 8 nmol/L.
- Local expert opinion puts the threshold for diagnosing hypogonadism and considering treatment low — under 8 nmol/L.
- Diagnosis needs at least two early-morning results below threshold, plus symptoms — never one number alone.
- The 8–12 nmol/L zone is genuinely grey: two morning results there is the territory BPAC suggests a GP discuss with an endocrinologist, because plenty of older men sit in that band without needing treatment.
Put the table and the thresholds together and you get the point most men miss: a result of 9 is inside every lab's range and still worth a proper look if the symptom picture fits — while a result of 7.9 from a 3pm sample proves nothing yet, because of the next section.
How to take a testosterone test that actually counts
Testosterone runs on a daily rhythm, highest in the morning — which is why a random afternoon number is close to meaningless. The rules, drawn from BPAC and the labs' own collection instructions:
- Morning sample. BPAC says 7–11 am, ideally after an overnight fast. The labs are tighter still: LabPLUS and Canterbury ask for collection before 10 am, Awanui between 8 and 10 am.
- Shift worker? Test two to three hours after waking instead.
- Repeat it. If the first result is low, repeat it — preferably about four weeks later — before anyone draws conclusions. A normal first result doesn't need repeating.
- Not while you're sick. Acute illness can push testosterone down temporarily; test when you're well.
- Total testosterone is the test. BPAC specifically recommends against diagnosing on directly measured free testosterone, because the available immunoassays for it are unreliable. When free testosterone matters — usually borderline totals or SHBG questions — NZ labs report a calculated value instead (the Vermeulen formula, from total testosterone and SHBG). For reference, LabPLUS and Awanui publish a calculated free testosterone range of 218–681 pmol/L for men 20–50, and 179–520 pmol/L over 50.
Reading American numbers: nmol/L vs ng/dL
New Zealand reports testosterone in nmol/L. Most of what you'll read online — US forums, podcasts, YouTube — uses ng/dL, and the units are almost 30-fold apart, which produces some spectacular misunderstandings. Multiply nmol/L by 28.84:
| nmol/L (NZ) | ng/dL (US) |
|---|---|
| 8 | ≈231 |
| 12 | ≈346 |
| 15 | ≈433 |
| 20 | ≈577 |
| 29 | ≈836 |
So when an American forum insists anything under "500" is a crisis, that's about 17 nmol/L — comfortably mid-range on every NZ lab's interval. Different unit, different conversation.
What I do with a borderline result
The same thing the guidance says to do: slow down and build the picture. A structured symptom check — the AMS questionnaire is a reasonable place to start — then a properly timed repeat morning sample, usually alongside SHBG and the pituitary hormones that tell you why a level is low, not just that it is. I've written separately about getting testosterone bloods done privately in NZ if you don't want to route the first step through your GP.
One number, taken once, at the wrong time of day, answers almost nothing. Two morning numbers plus an honest symptom history answers a great deal.
References (NZ-specific)
- LabPLUS (Te Toka Tumai Auckland) test guide — Testosterone: https://testguide.adhb.govt.nz/eguidemob/?gm=1401&gs=3
- LabPLUS test guide — Free testosterone (calculated): https://testguide.adhb.govt.nz/eguidemob/?gm=890&gs=3
- Awanui Labs — Reference intervals (Biochemistry document, issued 2 July 2026): https://www.awanuilabs.co.nz/north/auckland/for-referrers/tests/reference-ranges/
- Awanui Labs — Changes to testosterone requests (September 2024): https://www.awanuilabs.co.nz/central/taranaki/2024/09/16/changes-to-testosterone-requests/
- Canterbury Health Laboratories — Testosterone (plasma/serum): https://www.chl.co.nz/test/testosterone-plasma-serum/
- Te Whatu Ora Waikato laboratory test guide — Testosterone: https://lab.waikatodhb.health.nz/test-guide/view/832/testosterone
- BPAC NZ — Prescribing testosterone in ageing males (November 2024): https://bpac.org.nz/2024/testosterone.aspx
This article is general health information, not personalised medical advice. Laboratory reference intervals are updated from time to time — the linked lab guides are always the current source — and interpreting your own result needs a clinician who can see your symptoms, history and full blood picture alongside the number.