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Due Date Calculator

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The Due Date Calculator estimates the delivery date of a pregnant woman based on her last menstrual period (LMP), ultrasound, conception date, or IVF transfer date.

Select an estimation method and click Calculate

Estimated Due Date Result

First Trimester
Estimated Due Date:
May 18, 2027

You are currently at Week #11 (10 weeks 4 days or 2 months 13 days) of pregnancy.

● Fetal Development:: Around 1.61 in (4.1 cm) long and weighs around 7 g.
● Likely Conception Date:: Aug 25, 2026
Pregnancy Progress 26%
26%

40-Week Pregnancy Milestones Schedule

Week Date Range Trimester Important Milestones
Week 1 Aug 12, 2026 - Aug 18, 2026 First -
Week 2 Aug 19, 2026 - Aug 25, 2026 First -
Week 3 Aug 26, 2026 - Sep 1, 2026 First Baby conceived
Week 4 Sep 2, 2026 - Sep 8, 2026 First Pregnancy test positive
Week 5 Sep 9, 2026 - Sep 15, 2026 First -
Week 6 Sep 16, 2026 - Sep 22, 2026 First Heartbeat detectable by ultrasound
Week 7 Sep 23, 2026 - Sep 29, 2026 First Heartbeat detectable by ultrasound
Week 8 Sep 30, 2026 - Oct 6, 2026 First -
Week 9 Oct 7, 2026 - Oct 13, 2026 First -
Week 10 Oct 14, 2026 - Oct 20, 2026 First -
Week 11 ★ Oct 21, 2026 - Oct 27, 2026 First -
Week 12 Oct 28, 2026 - Nov 3, 2026 First -
Week 13 Nov 4, 2026 - Nov 10, 2026 Second Miscarriage risk decreases
Week 14 Nov 11, 2026 - Nov 17, 2026 Second -
Week 15 Nov 18, 2026 - Nov 24, 2026 Second -
Week 16 Nov 25, 2026 - Dec 1, 2026 Second -
Week 17 Dec 2, 2026 - Dec 8, 2026 Second -
Week 18 Dec 9, 2026 - Dec 15, 2026 Second Baby begins making noticeable movements, can hear sounds, and gender can be found out.
Week 19 Dec 16, 2026 - Dec 22, 2026 Second Baby begins making noticeable movements, can hear sounds, and gender can be found out.
Week 20 Dec 23, 2026 - Dec 29, 2026 Second Baby begins making noticeable movements, can hear sounds, and gender can be found out.
Week 21 Dec 30, 2026 - Jan 5, 2027 Second Baby begins making noticeable movements, can hear sounds, and gender can be found out.
Week 22 Jan 6, 2027 - Jan 12, 2027 Second -
Week 23 Jan 13, 2027 - Jan 19, 2027 Second -
Week 24 Jan 20, 2027 - Jan 26, 2027 Second Baby may be able to survive outside womb with intensive medical care.
Week 25 Jan 27, 2027 - Feb 2, 2027 Second Baby may be able to survive outside womb with intensive medical care.
Week 26 Feb 3, 2027 - Feb 9, 2027 Second Baby may be able to survive outside womb with intensive medical care.
Week 27 Feb 10, 2027 - Feb 16, 2027 Second Baby opens eyes, practices breathing.
Week 28 Feb 17, 2027 - Feb 23, 2027 Third -
Week 29 Feb 24, 2027 - Mar 2, 2027 Third -
Week 30 Mar 3, 2027 - Mar 9, 2027 Third -
Week 31 Mar 10, 2027 - Mar 16, 2027 Third -
Week 32 Mar 17, 2027 - Mar 23, 2027 Third -
Week 33 Mar 24, 2027 - Mar 30, 2027 Third -
Week 34 Mar 31, 2027 - Apr 6, 2027 Third -
Week 35 Apr 7, 2027 - Apr 13, 2027 Third -
Week 36 Apr 14, 2027 - Apr 20, 2027 Third -
Week 37 Apr 21, 2027 - Apr 27, 2027 Third Full term pregnancy begins.
Week 38 Apr 28, 2027 - May 4, 2027 Third Full term pregnancy.
Week 39 May 5, 2027 - May 11, 2027 Third Full term pregnancy.
Week 40 May 12, 2027 - May 18, 2027 Third Estimated due date! Baby is ready to meet the world.

Understanding your calculation

Method, example and limitations

How the calculation works

Due-date estimates project a pregnancy timeline from the selected menstrual, conception, ultrasound or treatment reference where supported by the chosen mode.

Example to check

Under the standard menstrual-date convention, adding 280 days to the first day of the last period gives an estimated due date.

Before using the result

A due date is an estimate rather than a prediction of delivery day. Irregular cycles, embryo-transfer timing and ultrasound information require appropriate dating conventions.

Calculation methodology · Report a result that needs review