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WOMEN’S HEALTH · NEW RESEARCH
Testosterone levels in women,
by age.
A 2026 study of more than 5,000 healthy women set out what a typical testosterone level looks like at each age from 18 to 60. Here are the reference ranges it published, what it found, and how to use it when you talk with your prescriber about your results.
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WHAT THE STUDY FOUND
One range
doesn’t fit every age.
Many lab reports compare a woman’s testosterone with a single range for all adult ages. Researchers at University College London, Imperial College London and Hertility Health, a UK hormone-testing company where most of the authors work, set out to test that. They analyzed testosterone results from 5,323 women aged 19 to 59 who were tested between 2020 and 2025.
Everyone in the reference group had a normal BMI and regular cycles, used no hormonal contraception, and had no history of PCOS, thyroid conditions, insulin resistance or excess hair growth. Each woman gave a finger-prick blood sample on day three of her cycle after fasting, and every sample was measured in the same accredited laboratory with a widely used immunoassay.
Total testosterone fell steadily across adult life, by about 1.4% a year on average, and the spread between women widened with age. The authors conclude that a result is best read against women of a similar age. Women who reported excess hair growth had higher levels on average than the reference group.
THE REFERENCE RANGES
The study’s testosterone ranges by age.
Total testosterone. “Typical range” is where 95% of the healthy women in the study fell at that age; “middle half” is where the central 50% fell.
| Age | Typical range (95% of women) | Middle half (50% of women) |
|---|---|---|
| 20 | 0.48–2.75 nmol/L14–79 ng/dL | 0.95–1.72 nmol/L28–49 ng/dL |
| 25 | 0.41–2.62 nmol/L12–76 ng/dL | 0.84–1.58 nmol/L24–46 ng/dL |
| 30 | 0.34–2.50 nmol/L10–72 ng/dL | 0.75–1.46 nmol/L22–42 ng/dL |
| 35 | 0.29–2.39 nmol/L8.4–69 ng/dL | 0.66–1.35 nmol/L19–39 ng/dL |
| 40 | 0.24–2.28 nmol/L7.0–66 ng/dL | 0.58–1.25 nmol/L17–36 ng/dL |
| 45 | 0.21–2.18 nmol/L5.9–63 ng/dL | 0.52–1.15 nmol/L15–33 ng/dL |
| 50 | 0.17–2.08 nmol/L5.0–60 ng/dL | 0.46–1.06 nmol/L13–31 ng/dL |
| 55 | 0.15–1.99 nmol/L4.2–57 ng/dL | 0.41–0.98 nmol/L12–28 ng/dL |
| 59 | 0.13–1.91 nmol/L3.7–55 ng/dL | 0.37–0.92 nmol/L11–26 ng/dL |
These are the study’s published figures (Table 4), measured by immunoassay in a UK population of women with regular cycles. The ng/dL values are our conversion, since many US labs report in ng/dL (1 nmol/L = 28.84 ng/dL). Labs that use other methods may report different ranges, so compare your result with the range on your own lab report. The study gives values for every age from 18 to 60; read the full study.
WHAT IT MEANS FOR YOU
Bring your results
to your prescriber.
A single number is one piece of the picture. Your prescriber reads a testosterone result alongside your age, where you are in your cycle, your symptoms and related labs such as free testosterone and SHBG. Our hormone lab guide lists the tests many prescribers order, so you can bring it to your appointment.
Because everyone in this study still had regular cycles, its ranges describe the years before menopause. If you are in perimenopause or past menopause, ask your prescriber how your result compares.
If your prescriber prescribes testosterone, our page on compounded testosterone for women explains the forms we prepare and how your prescription reaches us.
HOW WE CAN HELP
What we prepare for you.
Your prescriber sets the strength
We prepare exactly what your prescriber writes. If the strength changes, send us the new prescription and we will prepare it to match.
Pharmacist reviewed
A pharmacist reviews every formulation before it is made.
A lab list for your appointment
Our hormone lab guide lists the tests many prescribers order, including free testosterone and SHBG.
Easy to switch to us
Already have a prescription at another pharmacy? We can transfer it for you.
Wherever you live
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More for you: Testosterone for women · Hormone lab guide · Women’s health compounding · Transfer a prescription
QUESTIONS WOMEN ASK US
The things
worth knowing.
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What is a normal testosterone level for a woman?
It depends on age. In a 2026 study of 5,323 healthy women, 95% of 30-year-olds had a total testosterone between about 0.34 and 2.50 nmol/L (roughly 10 to 72 ng/dL), and 95% of 50-year-olds were between about 0.17 and 2.08 nmol/L (roughly 5 to 60 ng/dL). Your own lab's reference range and your prescriber's reading of your results come first.
Does testosterone go down with age in women?
Yes. In this study, total testosterone fell steadily across adult life, by about 1.4% a year on average, and the spread between women widened with age. That is why the authors recommend comparing a result with women of a similar age rather than with one range for all adults.
Why do different labs give different testosterone ranges?
Labs use different methods. This study used a widely used immunoassay; some labs use liquid chromatography-tandem mass spectrometry, which can give somewhat different numbers. Ranges also depend on who was in the reference group. Compare your result with the range printed on your own lab report.
Does the study cover women after menopause?
No. Everyone in the reference group had regular menstrual cycles and was tested on day three of her cycle, so the ranges describe women aged 19 to 59 who were still cycling, not levels after menopause.
Will you tell me what my testosterone level should be?
No. Your prescriber orders and interprets lab work and decides what, if anything, to do about a result. We prepare the medication your prescriber prescribes.
Reference ranges reproduced from Wainwright E, Getreu N, et al. Redefining testosterone reference ranges for adult females. J Endocrinol Invest. 2026;49(9):2339–2349 (open access, CC BY 4.0). Compounded preparations are not reviewed or approved by the FDA for safety or efficacy. This page is for education and is not medical advice. Decisions about your care rest with your prescriber, who also orders and interprets any lab work.