HealthCalc Hub

Due date for conception in October

This page maps October dates to due dates. A conception on day 1 gives 24 June, and on day 31 it gives 24 July.

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

Count 266 days forward from the day of conception. The result is the estimated due date. For October, day 31 maps to 24 July.

Worked example

Start at 15 October. Count 266 days ahead to reach 8 July. Across the whole month the due dates run from 24 June to 24 July. This example assumes a 365-day year.

Estimated due date for each day of October, counting 266 days from the day of conception. The table uses a 365-day year.

Date of conceptionDue date
1 October24 June
2 October25 June
3 October26 June
4 October27 June
5 October28 June
6 October29 June
7 October30 June
8 October1 July
9 October2 July
10 October3 July
11 October4 July
12 October5 July
13 October6 July
14 October7 July
15 October8 July
16 October9 July
17 October10 July
18 October11 July
19 October12 July
20 October13 July
21 October14 July
22 October15 July
23 October16 July
24 October17 July
25 October18 July
26 October19 July
27 October20 July
28 October21 July
29 October22 July
30 October23 July
31 October24 July

Common questions

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 October includes a 29 February, 8 July reads one day earlier, as 7 July.

How reliable is a due date worked out by month?

It is an estimate, and births spread across the weeks around it. A conception on day 15 of October gives 8 July, with arrivals spread across the weeks around that date.

Which month will my baby be born?

The due date month is a guide, and many births come earlier or later. A conception in October points to June and July.

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 October maps to 8 July.

How many weeks is the gap?

Divide the days by 7 to get weeks. From day 1 of October to 24 June is 266 days, which is 38 weeks.