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Calculators · Health & pregnancy

Pregnancy calendar

Track your pregnancy week by week from your last period, with a full timeline and key milestones you can download as a PDF.

Runs in your browser No signup Free forever PDF export
First day of last period
Due date
Average cycle length days

Enter your dates, then calculate — your progress and full timeline will appear here.

0%
Days passed
0 days
Days left
0 days
Pregnancy timeline
TrimesterMonthDate rangeWeekEvent
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How it works

Two steps, no account

1

Enter the first day of your last period

The due date fills in automatically (40 weeks later) — adjust it directly if your provider gave you a different date.

2

Read the timeline

Every week from conception to due date, grouped by trimester, with key developmental milestones flagged along the way.

FAQ

Common questions

Why does pregnancy "start" from my last period, not conception?
It's the standard clinical convention (gestational age) because the exact date of conception usually isn't known precisely, while the start of the last period usually is — due dates and week counts you get from a provider almost always use this same convention.
Is this timeline the same for every pregnancy?
The milestones shown are general reference points, not a personalized medical timeline — always follow your own care provider's guidance and appointment schedule over any generic week-by-week list.
Is my data sent anywhere?
No. The calendar and PDF are both generated entirely in your browser — nothing is transmitted, logged, or stored.
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Pregnancy Calendar

Track your journey from conception to delivery. Our Pregnancy Calendar calculates your due date and provides a detailed timeline of your baby's development.

How to Use

1. Enter Dates

  • First Day of Last Period: Select the date your last menstrual period began.
  • Cycle Length: Enter your average cycle length (default is 28 days).

2. Calculate

Click "Calculate Calendar".

3. View Your Timeline

  • Due Date: See your estimated delivery date.
  • Progress: Check how far along you are (days passed, days left).
  • Calendar: A week-by-week breakdown showing:
    • Trimester
    • Current Week
    • Key events (e.g., "Heart starts beating", "First movements").

4. Download

Download a PDF version of your personalized calendar to keep or print.

Key Features

  • Personalized Timeline: Adjusted to your specific cycle and dates.
  • Milestone Tracking: Highlights important developmental stages.
  • Trimester Breakdown: Clearly shows which trimester you are in.
  • PDF Export: Save your calendar as a document.

How It Works

This tool uses the standard medical method (Naegele's rule) to estimate due dates, adding 280 days (40 weeks) to the first day of your last menstrual period.

Note: This tool provides estimates for general information purposes only. Always consult your healthcare provider for medical advice.