Menstria · tools

All 15 tools.

Free, and every one runs in your browser. Nothing you enter leaves your device.

Get help now — before using anything on this site — if:

you are soaking through a pad or tampon every hour for two hours in a row;
you feel faint, dizzy or breathless, or your heart is racing;
you are pregnant, or might be, and you are bleeding;
you have any vaginal bleeding at all after menopause.

Cycles and bleeding

Check your own cycle

First Periods Checker

For girls roughly 8 to 18. · Ages 8–18

How Heavy Is Heavy?

Estimates menstrual blood loss from the specific products you use — pads, tampons, cups, discs, period underwear — using measured red-cell capacities. · Blood loss

Period Pain Navigator

Sorts ordinary period pain from the pattern that suggests endometriosis, adenomyosis or another secondary cause — using onset, timing, and what treatment has failed. · Pain

Cycle Length & Regularity Calculator

Enter your period start dates — up to 13 — and get cycle-by-cycle lengths scored against FIGO System 1, with the age-specific regularity threshold applied automatically. · Date calculator

Is My Cycle Normal?

An eight-step check covering length, regularity, duration, flow, pain and associated symptoms — sorting what is normal, what is normal variation, and what is worth raising with a clinician. · Symptom check

Menstrual Cycle Wheel

An interactive wheel showing where you are in your cycle — follicular and luteal phases, the fertile window, ovulation, and early embryo development day by day. · Interactive

Which one do I want? Use Cycle Length & Regularity if you have your period start dates and want them scored precisely. Use Is My Cycle Normal? if you do not have dates and want to work through symptoms in plain language. Use Period Pain Navigator if the problem is pain rather than the bleeding — including when the bleeding itself is entirely normal. Use First Periods Checker for anyone under about 18, since the adolescent reference ranges are wider and the adult tools would call normal maturation abnormal. And if the real question is not your cycle but a missed period — when to test, how to read a faint line, what your hCG level means — that is a site of its own: hCGcalculator.com, everything about early pregnancy testing, from the same family.

The transition

Perimenopause and menopause

Cycle Change Tracker

Start at 35. · Track from 35

Perimenopause Stage Finder

Maps your cycle changes and symptoms onto the STRAW+10 staging system — the framework your clinician uses — so you can name the stage you are in rather than guess at it. · Staging

Could I Be in Perimenopause or Menopause?

The starting point if you are not yet sure the question applies to you. · Symptom check

Menopause Treatment Navigator

Treatment options matched to your symptoms and health history — hormonal and non-hormonal — with the evidence behind each, in a form you can take to your appointment. · Treatment options

Hormone Therapy Decision Aid

Your personal benefit–risk picture for menopausal hormone therapy, built on the post-WHI reanalysis and current society guidance rather than the withdrawn warnings — with the numbers, and the questions to bring to your clinician. · Decision aid

HRT Candidacy & Timing Navigator

Clinician-level decision support: the timing window, absolute and relative contraindications, route and progestogen selection, and evidence-graded non-hormonal alternatives. · For clinicians

Perimenopause & Menopause — 100 Questions

One hundred questions across ten areas — symptoms, hormone therapy, bone, cardiovascular risk, labs, cancer screening — each opening in Claude or ChatGPT with a citation-constrained prompt, in a patient or a clinician version. · AI question set

Menopause Symptom Tracker

A structured record of symptoms over time, so an appointment starts from data rather than recollection. · Tracker

Menopause Competence

Structured education on menopause care for clinicians, and for patients who want the clinician-level version. · Education