HealthCalc Hub

Due date for a last period in June

Enter your last period start date to get a due date. This page is set up for June. The table below covers each day from day 1 to day 30.

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

The due date is 280 days after the first day of the last period. That is 40 weeks from the last period. For June, day 30 maps to 6 April.

Worked example

Say the first day of the last period is 15 June. Add 280 days to reach 22 March. Day 1 of June gives 8 March and day 30 gives 6 April. This example uses a 365-day year.

Estimated due date for each day of June, 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 June8 March
2 June9 March
3 June10 March
4 June11 March
5 June12 March
6 June13 March
7 June14 March
8 June15 March
9 June16 March
10 June17 March
11 June18 March
12 June19 March
13 June20 March
14 June21 March
15 June22 March
16 June23 March
17 June24 March
18 June25 March
19 June26 March
20 June27 March
21 June28 March
22 June29 March
23 June30 March
24 June31 March
25 June1 April
26 June2 April
27 June3 April
28 June4 April
29 June5 April
30 June6 April

Common questions

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 June gives 22 March, 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 last period in June points to March and April.

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 June maps to 22 March.

How many weeks is the gap?

Divide the days by 7 to get weeks. From day 1 of June to 8 March 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 June would then give 22 March only as a first guess.