Have I reached menopause? A 12-month counter

How the counter works

It counts the days from the date you entered to today and turns them into months and days. Then it adds one calendar year to your date, which is the day the NHS and ACOG definition is met if no bleeding comes before it. We count from the start of the period for the same reason as our guide to bleeding after menopause: it is the date most people can actually find. If your last period lasted a week, the true year ends a few days later than the date shown.

It also adds the guidance that applies to a gap of your length and to your age. The STRAW+10 staging system treats 60 days or more without a period as a marker of the late menopausal transition, and it describes the final period as something recognised only once a year has gone by. Your age changes the advice: the NHS page on early menopause calls periods stopping before 45 early and before 40 premature, and asks you to see a GP about it. The contraception dates come from the NHS symptoms page, which says to keep using contraception for 2 years after your final period if you are 40 to 49, and for 1 year if you are 50 or over. The counter uses your age today, so near a birthday the date it gives can be out by a year.

A worked example

Say you are 51, use no hormones, and your last period started on 14 March 2026. On 7 November 2026 the counter shows 238 days, or 7 months and 24 days. Your 12 months are up on 14 March 2027, which is 127 days away. Until then the late-transition marker applies, because the gap is well past 60 days, and a period arriving in January would set the count back to zero. At 51 the NHS advises contraception for a year after the last period, so you would need it until that same day in March.

Change one detail and the answer changes. If you enter the same date at age 43, the counter adds the NHS advice to see a GP about periods stopping before 45. The contraception date moves to March 2028. If you tick the contraception box because you have a hormonal coil, it explains that the coil itself may have stopped your periods.

When counting months won't give you an answer

Hormones taken for contraception are the main reason the count fails. The NHS lists the progestogen-only pill, the hormonal coil, the implant and the injection as methods that can make periods irregular or stop them, and notes that the combined pill brings a monthly bleed for as long as you take it. Either way, the bleeding pattern comes from the method rather than from your own cycle. Our page on perimenopause and hormonal contraception goes through each method.

HRT does something similar. The NHS guide to HRT types says sequential HRT, the kind usually given while periods are still coming, produces a bleed at the end of each progestogen course. Bleeding on that routine is caused by the treatment, so it neither proves nor rules out menopause. After a hysterectomy there are no periods to count at all, and if the ovaries were removed in the same operation, the NHS counts that surgery as one cause of early menopause. In each of these cases a doctor looks at your age and symptoms instead, and our guide to perimenopause tests explains when a blood test is used.

After the 12 months

Two rules change on the day the full year is up. Any vaginal bleeding from then on is postmenopausal bleeding, and the NHS asks you to see a GP even if it happened once, was only spotting or pink discharge, or you are not sure it was blood. Our guide to bleeding after menopause covers the causes and the tests. The other change is that the contraception clock starts to run out, on the dates above.

Symptoms do not stop on that date. The NHS says they usually last 7 to 9 years in all and can change along the way, with joint pain and vaginal dryness among those that may continue after menopause. The full list of perimenopause symptoms covers what to keep an eye on.

My take

I'd do the count once, write the 12-month date on a calendar, and stop checking every week. A gap of seven or eight months feels like the end, but a late period at month ten is common enough that the count only means something once the year is complete. I'd also keep noting any bleed, however small, with its date in the printable symptom diary, because one spot is what turns a countdown into a GP appointment. If you are on contraception or HRT, I would skip the count and ask the doctor who prescribed it how they will judge it.

Related reading

Our article on when perimenopause starts sets out the ages and stages around this date, and the stage finder tells you which stage you are in if your periods have not stopped yet. While they are still coming, the cycle length calculator reads the gaps between them. Every guide on timing is gathered under stages and timing.