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Due Date Calculator On-device

Estimate your due date from your last period, conception date, or IVF embryo transfer — shown in both Gregorian and Hijri calendars.

An estimate for general information — not medical advice. Your clinician confirms pregnancy dating, usually with an early ultrasound.

Free due date calculator: estimate your delivery date from your last period, conception date, or IVF embryo transfer, with the result in both Gregorian and Hijri calendars plus current gestational age and trimester. Works entirely on your device.

About this tool

What you provide

  • The first day of your last period, or the conception date, or the IVF embryo transfer date
  • For IVF, whether it was a day-3 or a day-5 embryo

What you get

  • The estimated due date in both the Gregorian and Hijri calendars
  • Today's gestational age in weeks and days, and the trimester

Limits

  • The last-period method assumes a 28-day cycle; only about 10-13% of cycles are exactly 28 days.
  • Only about 4-5% of births happen on the estimated date itself.
  • An estimate for general information, not medical advice — your clinician confirms pregnancy dating, usually with an early ultrasound.

How to use it

  1. Choose the dating method

    Press From last period, From conception or IVF transfer; the date field below is relabelled for the method you picked.

  2. Set the embryo age

    In IVF transfer mode, choose Day-3 embryo or Day-5 embryo — the two settings put the due date two days apart.

  3. Enter the date

    Pick the date in the date field: the first day of your last period, the conception date, or the embryo transfer date.

  4. Read the estimate

    The estimated due date appears in both the Gregorian and Hijri calendars, with today's gestational age in weeks and days and the trimester underneath.

Frequently asked questions

How is my due date calculated?

You can estimate it from your last menstrual period, conception date, or IVF embryo transfer date, and the result is shown in both Gregorian and Hijri calendars.

How accurate is the estimated due date?

It's an estimate only — only about 4-5% of births actually happen on the estimated date, so treat it as a guide rather than a guarantee.

Is the due date calculator free?

Yes, it's free to use and the calculation happens on your device.