Normal Testosterone Levels in Women: Reference Ranges by Age

In women, total testosterone is usually reported in ng/dL and typically falls somewhere around 8–55 ng/dL, while free testosterone is reported in pg/mL (or as a percentage of total) and sits well below roughly 4–6 pg/mL. Those are reference ranges, not verdicts. The numbers shift with age, vary enormously between laboratories, and — a point almost no lab report tells you — are measured by assays that were built for the male range and handle low female concentrations badly. So a single value out of context tells you very little. The one rule that always holds: read your result against the range printed on your report and against how you actually feel, not against a chart from the internet.

What counts as a "normal" testosterone level for a woman?

There is no single official cutoff, because "normal" depends on the assay, the lab, your age, and where you are in menopause. The ranges below are illustrative — a sense of the ballpark reputable labs use, gathered so you can orient yourself. They are not a diagnostic threshold, and your lab's printed range may look quite different.

A few things to notice. Total testosterone is the whole amount circulating; free testosterone is the small fraction (usually under 2%) not bound to sex-hormone-binding globulin (SHBG). Because SHBG rises with estrogen, oral estrogen or birth control pills, thyroid changes, and pregnancy, your free-T can swing even when total-T barely moves. Some labs skip free-T entirely and instead calculate a "free androgen index" from total testosterone and SHBG. All of this is why two accurate reports can look contradictory.

Units are a final trap. Most US labs report total testosterone in ng/dL, but many countries — and some US labs — use nanomoles per litre (nmol/L) instead. To convert, multiply ng/dL by 0.0347, so a total testosterone of 30 ng/dL is about 1.0 nmol/L. If your report and a chart you found online are in different units, you may be comparing numbers that are not the same measurement at all — one more reason to trust the range printed on your own report over anything you look up.

Why the number on your report might be unreliable

This is the most under-told fact in female hormone testing. The 2019 Global Consensus Position Statement on testosterone therapy for women — endorsed by the Endocrine Society, The Menopause Society, the International Menopause Society and others — states plainly that the direct (automated) immunoassays most labs run are highly unreliable in the female range. They were validated for men, whose testosterone runs roughly ten to twenty times higher, and they lose accuracy exactly where women's values live. The consensus recommends liquid or gas chromatography with tandem mass spectrometry (LC-MS/MS or GC-MS/MS) as the accurate method for measuring low female levels.

Practical translation: if a result surprises you or drives a decision, ask which assay was used, and whether it can be repeated by LC-MS/MS. Draw the sample in the morning if possible, on a consistent day, and know that a single reading is a snapshot — testosterone fluctuates across the day and the menstrual cycle. One borderline value is a reason to repeat, not to diagnose. Our lab results explainer can help you frame what to ask.

How does testosterone change with age?

Here is where testosterone differs sharply from estrogen. Estrogen falls off a cliff at menopause; testosterone does not. A woman's testosterone declines gradually from her 20s onward, driven mostly by the slow fade of adrenal androgen (DHEA) production rather than by the ovaries switching off. By the early 40s, average levels are roughly half what they were in the late teens and early 20s — and that halving happens well before the menopausal transition. Crucially, the postmenopausal ovary keeps making androgens; it still accounts for something like 40–50% of circulating testosterone after menopause. So menopause itself is not a testosterone cliff, and a low-normal reading in your 50s is largely the arithmetic of age, not a disease. For the bigger hormonal picture of the transition, see our menopause hub and overview of testosterone in women.

What does a high testosterone result mean?

Mildly to moderately elevated testosterone in a woman of reproductive age is, far and away, most often polycystic ovary syndrome (PCOS) — the commonest cause of androgen excess in women. PCOS typically shows up as some combination of irregular or absent periods, acne, unwanted hair growth (hirsutism), and often insulin resistance; the testosterone elevation is usually modest. If that pattern fits, it is worth reading our guide to PCOS symptoms and birth control options for PCOS, and talking to a clinician about a full workup rather than a testosterone number alone.

Less common causes include congenital adrenal hyperplasia, and — rarely — androgen-secreting tumors of the ovary or adrenal gland. The pattern that should prompt prompt medical evaluation is not a slightly high number but a story: testosterone that is very high, or that rose rapidly, especially with signs of virilization — a deepening voice, scalp hair loss in a male pattern, clitoral enlargement, or fast-growing coarse body hair. That combination needs assessment quickly, because it points away from PCOS and toward something that requires imaging and specialist care.

What does a low testosterone result mean?

Honestly? Often nothing actionable — and this is where women are most misled by marketing borrowed from men's health. There is no established "low T" diagnosis in women the way there is in men. Research has not defined a blood level below which a woman can be said to be "testosterone deficient," and low testosterone by itself has not been reliably linked to low libido, low energy, mood, or bone loss. The 2019 global consensus is explicit that a testosterone level should not be used to diagnose a deficiency or to select who might benefit from treatment.

There is also no FDA-approved testosterone product for women in the United States (as of 2026), and there never has been. The single evidence-based use is low-dose testosterone for postmenopausal hypoactive sexual desire disorder (HSDD) — genuinely distressing low desire that persists after other causes have been addressed. Even then it is prescribed off-label using a fraction of a male dose, chosen by clinical picture and monitored to keep levels in the normal female range — never dosed to a lab target and never as a wellness booster. An investigational deuterated testosterone (AVA-291) received FDA development-pathway guidance in January 2026, but it is years and unproven from any approval decision. We cover the treatment question in depth in testosterone therapy for women and low libido in menopause. What this article will not do — and what no honest source should — is name a dose. That is a conversation for you and a prescriber.

A word on at-home and direct-to-consumer testosterone kits: they are convenient, but many use the very immunoassays that struggle in the female range, and a "low" or "optimal" number from a marketing funnel is not a diagnosis. If a test result is being used to sell you a hormone, treat that as a conflict of interest, not clinical advice.

When should you talk to a clinician?

Testing testosterone makes sense when it will change what you do — usually because of a symptom pattern, not curiosity about a number. Consider a conversation with your clinician if you have:

• Signs of androgen excess: new or worsening acne, hirsutism, scalp hair thinning, or irregular/absent periods — especially if PCOS runs in the family.
• Any rapid change or virilization: a deepening voice, clitoral enlargement, or fast male-pattern hair changes. This warrants prompt evaluation, not watchful waiting.
• Postmenopausal HSDD: persistent, distressing low sexual desire after menopause, once relationship, mood, medication, sleep, and vaginal-dryness factors have been considered — the one setting where testosterone therapy has evidence behind it.
• A confusing or borderline result: bring the actual report, ask which assay was used, and ask whether an LC-MS/MS repeat is appropriate before acting on it.

Bring your printed result, a symptom timeline, and a list of everything you take — including oral estrogen or birth control, thyroid medication, and supplements — because several of these move SHBG and shift the free-testosterone number without any change in your actual androgen production. A clinician reads the whole picture; a single number, from an assay that may not even be built for you, does not.

This article is reference information, not medical advice or a diagnosis. It does not recommend testosterone therapy, a dose, or any change to a medication or supplement. Talk to a qualified clinician or pharmacist about your own results and care.