Pregnancy Calendar
See your full pregnancy timeline at a glance — current week, trimester, due date, and days remaining — from your last menstrual period.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Your result
14 weeks
Current week
AI explanation
Formula
Due date = last period date + 280 days. Current week = days since last period / 7Worked example
LMP 2026-01-01, as of 2026-01-01
| Field | Value |
|---|---|
| First day of last menstrual period | 01-01-2026 |
| As of date | 01-01-2026 |
| Estimated due date | 08-10-2026 |
| Current week | 0 |
| Trimester | 1 |
Assumptions
- Uses Naegele's rule (280 days / 40 weeks from the last menstrual period), which assumes a regular 28-day cycle.
- Trimesters are divided at week 13 and week 27, a common convention.
- Informational only — always confirm dates and progress with your healthcare provider.
Frequently asked questions
What does a pregnancy calendar show?
A single view of your current week, trimester, estimated due date, and days remaining — everything you'd otherwise check across several separate calculators.
How accurate is the due date shown?
It uses Naegele's rule, a menstrual-dating estimate — an early ultrasound generally gives a more precise due date, especially if your cycle isn't exactly 28 days.
Can I check a date in the past or future?
Yes — change the "as of date" field to see your pregnancy status on any date, not just today.
Related calculators
Sources
- Methods for Estimating the Due Date — American College of Obstetricians and Gynecologists (ACOG). Effective 01-05-2017, reviewed 13-09-2026.
This calculator provides a general estimate only and does not constitute personalized medical advice. Always confirm dates and monitor your pregnancy with a qualified healthcare provider.
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