HealthCalc Hub

Due date for a last period in November

A last period in November puts the due date between 8 August and 6 September. The table lists every day.

Pick a date to see your due date.

This calculator gives general information only. It is not medical advice. Talk to a doctor or other qualified health professional about your own health.

How it works

Add 280 days to the first day of the last period to get the due date. The table does this for each day of November. The November table has 30 rows, one per day.

Worked example

Take 15 November as the first day of the last period. 280 days later is 22 August. The first day of November lands on 8 August and the last lands on 6 September. The year in this example has 365 days.

Estimated due date for each day of November, counting 280 days from the first day of the last period. The table uses a 365-day year.

First day of last periodDue date
1 November8 August
2 November9 August
3 November10 August
4 November11 August
5 November12 August
6 November13 August
7 November14 August
8 November15 August
9 November16 August
10 November17 August
11 November18 August
12 November19 August
13 November20 August
14 November21 August
15 November22 August
16 November23 August
17 November24 August
18 November25 August
19 November26 August
20 November27 August
21 November28 August
22 November29 August
23 November30 August
24 November31 August
25 November1 September
26 November2 September
27 November3 September
28 November4 September
29 November5 September
30 November6 September

Common questions

What if I only know the month?

Use the middle of the month. The due date then falls in the middle of the window. Day 15 of November maps to 22 August.

How many weeks is the gap?

Divide the days by 7 to get weeks. From day 1 of November to 8 August is 280 days, which is 40 weeks.

What if my cycle is not regular?

When cycles are irregular, an ultrasound can date a pregnancy more reliably than a calendar. A date of 15 November would then give 22 August only as a first guess.

Does the year change the due date?

Only if the span includes 29 February, which moves the date one day earlier. If the span from 15 November includes a 29 February, 22 August reads one day earlier, as 21 August.

How reliable is a due date worked out by month?

It is an estimate, and births spread across the weeks around it. A last period on day 15 of November gives 22 August, with arrivals spread across the weeks around that date.