Due date
October 22, 2026
12 weeks · 0 days
196 days left
First trimester
Home Due date calculator
Due date calculator
Change the date or the cycle and the week table follows.
- 4 weeks2026-02-12February 12, 2026
- 8 weeks2026-03-12March 12, 2026
- 12 weeks2026-04-09April 9, 2026
- 20 weeks2026-06-04June 4, 2026
- 28 weeks2026-07-30July 30, 2026
- 36 weeks2026-09-24September 24, 2026
- 40 weeks2026-10-22October 22, 2026
Why this exists
In US clinics this is Naegele’s rule: a last period of January 15, 2026 and a 28-day cycle land on October 22, 2026. It is not the plain date-difference page.
Dates stay small so they remain inside the card. The record stays in this browser and nothing is sent to a server.
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01How to use it
Choose last period, conception, IVF day 5, or IVF day 3.
The sample is 2026-01-15, cycle 28, as of 2026-04-09.
Use today changes only the as-of date to this device’s today.
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02What you get
The large date is the due date in ISO, with the local date under it.
Weeks, days left, and the trimester each have a line.
The table lists weeks 4, 8, 12, 20, 28, 36, and 40.
EnteredLMP 2026-01-15
2026-10-22 Due date 2026-01-29 Conception 12 Weeks 196 Days left -
03Worth knowing
If the cycle is not 28, the due date shifts by the difference.
IVF day 5 adds 261 days to the transfer. Day 3 adds 263.
These figures do not replace an exam or an ultrasound.
Questions
- QWhat is 2026-10-22?
- A2026-01-15 plus 280 days.
- QWhat is 12?
- AWeeks from the last period on 2026-04-09.
- QWhat is 196?
- ADays from 2026-04-09 until the due date.
- QIs this the date calculator?
- AThe date calculator only counts the gap between two days. This page estimates pregnancy weeks and a due date.
How this page works it out
This page adds 280 days to a last period. 2026-01-15 with a 28-day cycle is due on 2026-10-22.
Estimated conception is 2026-01-29. On 2026-04-09 that is 12 weeks and 0 days, with 196 days left.
If the cycle is not 28, the due date shifts by the difference. IVF day 5 adds 261 days and day 3 adds 263. This is separate from the date-gap page and does not replace a clinic.