Average age of menopause in the US, and what affects it

The average age of natural menopause in the US is about 51 to 52. The National Institute on Aging (NIA) and the Office on Women’s Health both put it at 52, and large US studies have found medians between 51.4 and 52.5. Menopause is dated to your final period, confirmed after 12 months without one, so perimenopause usually begins several years before that age.

What the US data show

Different sources give slightly different numbers, mostly because they measure in different ways.

Source	Who was studied	Age at natural menopause
NIA and Office on Women’s Health	Federal patient guidance	Average 52
SWAN cross-sectional survey (Gold, 2001)	14,620 women aged 40 to 55 at seven US sites, 1995 to 1997	Median 51.4, adjusted for other factors
SWAN longitudinal analysis (Gold, 2013)	3,302 women followed yearly from 1996 to 2007; 1,483 natural final periods observed	Median 52.5
National health surveys (Appiah, 2021)	7,773 women aged 40 to 74 who reported natural menopause	Mean 48.4 in 1959 to 1962; 49.9 in 2015 to 2018

Why the numbers differ

Median versus mean. A median is the age by which half of women have reached menopause. A mean is the arithmetic average. They are close but not identical.

Following women forward versus asking them to remember. The 2013 SWAN analysis followed women year by year and recorded the final period as it happened. Surveys rely on recall, sometimes years later.

Who is counted. A survey that includes only women who have already reached menopause leaves out women of the same age who are still having periods. Those later menopauses are missing, which can pull the average down. This is one reason the national survey means sit below the SWAN medians.

For planning purposes, the useful message is the range. The NIA says most women begin the menopausal transition between ages 45 and 55, and the final period most often comes in the early 50s.

Early and premature menopause

The Office on Women’s Health uses two cutoffs:

• Premature menopause: before 40. This is also called primary ovarian insufficiency.
• Early menopause: between 40 and 45. About 5% of women reach menopause in this window naturally.

In a pooled international analysis of 17 studies, 1.9% of women had premature and 7.3% had early menopause, a reminder that estimates vary by population. Earlier menopause means more years without ovarian estrogen, which is why it is treated as a health issue rather than just a date. See primary ovarian insufficiency for what that involves.

What moves the timing

Smoking

Smoking is the most consistent factor and the one you can change. In the 17-study pooled analysis, which included more than 200,000 postmenopausal women, current smokers had about twice the risk of premature menopause and 1.8 times the risk of early menopause compared with never smokers. Risk rose with the number of cigarettes, years of smoking and pack-years, and smoking for 15 to 20 years was the strongest predictor. Former smokers had a much smaller excess risk, and women who had quit more than 10 years earlier had the same risk as never smokers. The Office on Women’s Health notes that smokers may reach menopause as many as two years before nonsmokers.

Body weight

In the longitudinal SWAN analysis, higher weight at the start of the study was associated with a later final period.

Reproductive history

Having had children and prior use of oral contraceptives were associated with later menopause in the SWAN survey. Prior oral contraceptive use was also linked to a later final period in the longitudinal analysis and the national survey data.

Education, work and health

In SWAN, lower educational attainment, being separated, widowed or divorced, not being employed and a history of heart disease were associated with earlier menopause. In the longitudinal analysis, higher education, employment, better self-rated health and not smoking were linked to a later final period. The national survey analysis found poverty associated with earlier menopause. These are population patterns, not predictions for any one woman.

Race and ethnicity

The NIA notes that, compared with White women, Black women are more likely to have an early onset of menopause, and the national survey analysis found Black and Hispanic women had earlier natural menopause. In the longitudinal SWAN analysis, however, racial and ethnic groups did not differ in age at the final period once sociodemographic, lifestyle and health factors were taken into account. The SWAN authors concluded that age at menopause reflects a complex interplay of health and socioeconomic factors.

Family history and medical treatment

The Office on Women’s Health lists family history of early menopause, chemotherapy or pelvic radiation, and surgery to remove the ovaries as causes of earlier menopause. Removing the uterus while keeping the ovaries does not cause menopause, but natural menopause may come a year or two earlier than expected. Our guide to surgical menopause covers what happens when the ovaries are removed.

Is the average age changing?

The national survey analysis suggests it is rising. From 1959 to 1962 through 2015 to 2018, the mean age at natural menopause increased from 48.4 to 49.9 years. Over the same period, the average age at a first period fell from 13.5 to 12.7, so the reproductive life span grew from 35.0 to 37.1 years.

Can you predict your own age at menopause?

Only roughly. Family history gives a hint, smoking pushes it earlier, and your own cycle changes in your 40s give the most practical signal. No blood test can name the date, though some markers can suggest whether the final period is near; see why hormone tests are often normal. For how the years before menopause usually unfold, read when perimenopause starts.

When to see a clinician

• Your periods have stopped, or become very irregular, before 45
• You have any bleeding or spotting after 12 months without a period, which the NIA lists as a reason to see a doctor
• Symptoms such as hot flashes, sleep loss or mood change are affecting daily life
• You want to talk about bone or heart health after an early menopause

To find a clinician who treats menopause, browse the directory or use the symptom check to prepare for your visit.