Pregnancy Calculator
Estimate due date, conception timing, gestational age, and key pregnancy milestones.
Pregnancy calculator guide for due date and milestones
WeCovr's pregnancy calculator estimates due date, conception timing, gestational age, and trimester milestones using the first day of your last period and your average cycle length.
What this pregnancy calculator estimates
This calculator provides a broad pregnancy timeline from your last menstrual period. It estimates due date, a likely conception window, current gestational age, and key trimester dates.
It is meant for general planning and curiosity, not for clinical dating.
Uses last menstrual period and cycle length.
Estimates due date and conception timing.
Shows trimester milestone dates.
Why cycle length matters
People with longer or shorter cycles may ovulate later or earlier than the standard 28-day assumption. Adding cycle length can make the estimate a little more tailored.
When this estimate can differ from medical dating
Irregular cycles, uncertain dates, assisted conception, or early scan findings can all shift the timeline. Clinical advice and ultrasound dating take priority over an online estimate.
Pregnancy date tools at a glance
| Tool | Main input | Useful for | Limitation |
|---|---|---|---|
| Pregnancy calculator | LMP and cycle length | Broader timeline view | Still an estimate |
| Due date calculator | LMP and cycle length | Quick due date estimate | Narrower output |
| Ultrasound dating | Clinical scan | More precise dating | Requires clinical assessment |
Related WeCovr resources
FAQs
Is this the same as a due date calculator?
It includes due date estimation, but it also adds conception timing, gestational age, and trimester milestones.
How accurate is the due date estimate?
It is a practical estimate only. Medical dating and ultrasound advice are more important if they differ.
What if my cycle is irregular?
Irregular cycles can make LMP-based estimates less reliable, so the result may differ from a clinician's assessment.
Should I use this instead of speaking to a midwife or doctor?
No. It is for general guidance only and does not replace professional care.
Get your score
Get your free Protection Score
Check how protected you are, spot the biggest gaps, and then decide what to do next.
Answer a few quick questions
See where your biggest protection gaps may be
Move into the right next step if you want help
What you get
A quick view of your current protection position
A clearer idea of where the biggest gaps may be
A direct route to tailored help if you want it