Pregnancy week calculator
“What week am I?” is the text you send at 11pm. This page answers with week number + leftover days, a plain-language trimester nudge, and LMP or EDD (or IVF transfer) as the anchor. Estimate only — not medical advice.
Enter a date to see an estimate.
What this page does
Same engine as gestational age, framed for the conversational search. Primary output reads like “about X weeks Y days pregnant (estimate)” instead of chart jargon.
We refuse fruit-size poetry and symptom checkers. Dating math only — so you can announce to family, check an app badge, or translate an EDD into a week for a work email without installing another tracker.
When to use
Announcing in weeks; checking an app badge; translating an EDD into a week for email.
When not to
Symptom checkers and baby-fruit marketing widgets are out of scope.
Assumptions
Browser-only planning arithmetic. Defaults are disclosed on the page. Ultrasound and clinic policy override this tool.
Examples
LMP Feb 14, 2026 · today Jul 17, 2026 → About 21 weeks 6 days.
EDD Jan 10, 2027 · today Jul 17, 2026 → Weeks + days + trimester hint.
Gotchas
Clinic dating after ultrasound can differ from browser math — the clinic wins for medical decisions.
Wrong input dates (retrieval vs transfer, spotting vs true LMP) slide every result.
Estimate only — not medical advice.
How this is calculated
The math stays in your browser. Enter the dates you actually know, read the estimate, and treat clinic ultrasound dating as the authority when it disagrees.
Nothing here is medical advice, a diagnosis, or a substitute for prenatal care.
- Enter the date(s) or numbers this page asks for.
- Check the assumptions under the result and on Methodology.
- Compare with your clinic portal if you have one.
- Use related tools if you only have a different kind of date.
- Confirm medical decisions with your clinician.
Same GA engine as gestational-age-calculator.
Related calculators
More clinical label: gestational age calculator. Oral query: how many weeks pregnant. LMP-only: pregnancy week by LMP.
See also: gestational age calculator, how many weeks pregnant calculator, and trimester calculator.
FAQ
- How do I calculate my pregnancy week?
- From LMP or EDD, count days and divide into weeks + leftover days.
- Do weeks start at zero or one?
- We show completed weeks + days in the obstetric GA framework.
- Can I use my conception date?
- Convert via EDD or use the conception calculator first.
- Is this the same as my app?
- Only if the app used the same LMP/EDD.
- IVF with no real period?
- Use IVF transfer mode or build an LMP-equivalent.
- Is this medical advice?
- Estimate only — not medical advice. Confirm dating, testing, and medical decisions with your clinic.