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Pregnancy Calculator

Estimate a due date, gestational age, trimester, and pregnancy milestones across Gregorian, Persian, Islamic Hijri, and Hebrew calendars.

-- Enter a date to calculate
1st trimester 2nd trimester 3rd trimester
Estimated due date
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Shown in all calendars below.
Today
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Estimated conception
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Approx. LMP + 14 days for LMP-based dating.
Pregnancy window
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37-42 weeks is a common broad birth window.

Due Date Across Calendars

Calendar Estimated due date LMP / starting date

Pregnancy Milestones

This is an estimate for planning and education, not medical advice. Estimated due dates can be refined by clinicians using menstrual history, early ultrasound, IVF dates, and individual clinical factors.

How to use: Track pregnancy dates across four calendars

Calculate due date and week-by-week progress from your last period or conception date, shown simultaneously in Gregorian, Persian, Islamic and Hebrew calendars, in English or Persian.

  1. Enter the date of the last menstrual period, or switch to conception date if you know it.
  2. Read the estimated due date and current progress, shown in all four calendar systems.
  3. Check the trimester timeline to see key week boundaries.
  4. Switch language with the toggle — the whole page works in Persian with proper right-to-left layout.

Tip: Dates are standard clinical estimates (280 days from the last period); your care provider's ultrasound dating takes precedence.