This handy little script will calculate a due date based on the date of your first breeding 
and the standard of a 63 day gestation period.

Date of first breeding:        
                                          (MM/DD/YYYY format)





Estimated Due Date:           

Whelping Chart by hand below

How to use this chart

Scroll down the first set of dates on the left and locate the day and month your female was bred. The date to the right of your breed date is the estimated date your female will deliver her puppies

Example #1 : if your female was bred on 1st of Jan , she will be due on 4th of Mar

Example # 2 : bred 4 Mar , she is due 6 May

Note* Puppies are usually born 61 days after conception. It take 48 hours for the egg to ripen before the egg will allow penetration of sperm. If your female ovulates on day 11 of her cycle, than conception began on day 13 of her cycle. Not knowing exactly when ovulation occurs, this chart is as close as you can get to predicting her due date.

There are many factors that determine due date

1. first timers whelp later

2. large litters whelp earlier

1-Jan 4-Mar

2-Jan 5-Mar

3-Jan 6-Mar

4-Jan 7-Mar

5-Jan 8-Mar

6-Jan 9-Mar

7-Jan 10-Mar

8-Jan 11-Mar

9-Jan 12-Mar

10-Jan 13-Mar

11-Jan 14-Mar

12-Jan 15-Mar

13-Jan 16-Mar

14-Jan 17-Mar

15-Jan 18-Mar

16-Jan 19-Mar

17-Jan 20-Mar

18-Jan 21-Mar

19-Jan 22-Mar

20-Jan 23-Mar

21-Jan 24-Mar

22-Jan 25-Mar

23-Jan26-Mar

24-Jan 27-Mar

25-Jan 28-Mar

26-Jan 29-Mar

27-Jan 30-Mar

28-Jan 31-Mar

29-Jan 1-Apr

30-Jan 2-Apr

31-Jan 3-Apr

1-Feb 4-Apr

2-Feb 5-Apr

3-Feb 6-Apr

4-Feb 7-Apr

5-Feb 8-Apr

6-Feb 9-Apr

7-Feb 10-Apr

8-Feb 11-Apr

9-Feb 12-Apr

10-Feb 13-Apr

11-Feb 14-Apr

12-Feb 15-Apr

13-Feb 16-Apr

14-Feb 17-Apr

15-Feb 18-Apr

16-Feb 19-Apr

17-Feb 20-Apr

18-Feb 21-Apr

19-Feb 22-Apr

20-Feb 23-Apr

21-Feb 24-Apr

22-Feb 25-Apr

23-Feb 26-Apr

24-Feb 27-Apr

25-Feb 28-Apr

26-Feb 29-Apr

27-Feb 30-Apr

28-Feb 1-May

29-Feb 2-May

1-Mar 3-May

2-Mar 4-May

3-Mar 5-May

4-Mar 6-May

5-Mar 7-May

6-Mar 8-May

7-Mar 9-May

8-Mar 10-May

9-Mar 11-May

10-Mar 12-May

11-Mar 13-May

12-Mar 14-May

13-Mar 15-May

14-Mar16-May

15-Mar 17-May

16-Mar 18-May

17-Mar 19-May

18-Mar 20-May

19-Mar 21-May

20-Mar 22-May

21-Mar 23-May

22-Mar 24-May

23-Mar 25-May

24-Mar 26-May

25-Mar 27-May

26-Mar 28-May

27-Mar 29-May

28-Mar 30-May

29-Mar 31-May

30-Mar 1-Jun

31-Mar 2-Jun

1-Apr 3-Jun

2-Apr 4-Jun

3-Apr 5-Jun

4-Apr 6-Jun

5-Apr 7-Jun

6-Apr 8-Jun

7-Apr 9-Jun

8-Apr 10-Jun

9-Apr 11-Jun

10-Apr 12-Jun

11-Apr 13-Jun

12-Apr 14-Jun

13-Apr 15-Jun

14-Apr 16-Jun

15-Apr 17-Jun

16-Apr 18-Jun

17-Apr 19-Jun

18-Apr 20-Jun

19-Apr 21-Jun

20-Apr 22-Jun

21-Apr 23-Jun

22-Apr 24-Jun

23-Apr 25-Jun

24-Apr 26-Jun

25-Apr 27-Jun

26-Apr 28-Jun

27-Apr 29-Jun

28-Apr 30-Jun

29-Apr 1-Jul

30-Apr 2-Jul

1-May 3-Jul

2-May 4-Jul

3-May 5-Jul

4-May 6-Jul

5-May 7-Jul

6-May 8-Jul

7-May 9-Jul

8-May 10-Jul

9-May 11-Jul

10-May 12-Jul

11-May 13-Jul

12-May 14-Jul

13-May 15-Jul

14-May 16-Jul

15-May 17-Jul

16-May 18-Jul

17-May 19-Jul

18-May 20-Jul

19-May 21-Jul

20-May 22-Jul

21-May 23-Jul

22-May 24-Jul

23-May 25-Jul

24-May 26-Jul

25-May 27-Jul

26-May 28-Jul

27-May 29-Jul

28-May 30-Jul

29-May 31-Jul

30-May 1-Aug

31-May 2-Aug

1-Jun 3-Aug

2-Jun 4-Aug

3-Jun 5-Aug

4-Jun 6-Aug

5-Jun 7-Aug

6-Jun 8-Aug

7-Jun 9-Aug

8-Jun 10-Aug

9-Jun 11-Aug

10-Jun 12-Aug

11-Jun 13-Aug

12-Jun 14-Aug

13-Jun 15-Aug

14-Jun 16-Aug

15-Jun 17-Aug

16-Jun 18-Aug

17-Jun 19-Aug

18-Jun 20-Aug

19-Jun 21-Aug

20-Jun 22-Aug

21-Jun 23-Aug

22-Jun 24-Aug

23-Jun 25-Aug

24-Jun 26-Aug

25-Jun 27-Aug

26-Jun 28-Aug

27-Jun 29-Aug

28-Jun 30-Aug

29-Jun 31-Aug

30-Jun 1-Sep

1-Jul 2-Sep

2-Jul 3-Sep

3-Jul 4-Sep

4-Jul 5-Sep

5-Jul 6-Sep

6-Jul 7-Sep

7-Jul 8-Sep

8-Jul 9-Sep

9-Jul 10-Sep

10-Jul 11-Sep

11-Jul 12-Sep

12-Jul 13-Sep

13-Jul 14-Sep

14-Jul 15-Sep

15-Jul 16-Sep

16-Jul 17-Sep

17-Jul 18-Sep

18-Jul 19-Sep

19-Jul 20-Sep

20-Jul 21-Sep

21-Jul 22-Sep

22-Jul 23-Sep

23-Jul 24-Sep

24-Jul 25-Sep

25-Jul 26-Sep

26-Jul 27-Sep

27-Jul 28-Sep

28-Jul 29-Sep

29-Jul 30-Sep

30-Jul 1-Oct

31-Jul 2-Oct

1-Aug 3-Oct

2-Aug 4-Oct

3-Aug 5-Oct

4-Aug 6-Oct

5-Aug 7-Oct

6-Aug 8-Oct

7-Aug 9-Oct

8-Aug 10-Oct

9-Aug 11-Oct

10-Aug 12-Oct

11-Aug 13-Oct

12-Aug 14-Oct

13-Aug 15-Oct

14-Aug 16-Oct

15-Aug 17-Oct

16-Aug 18-Oct

17-Aug 19-Oct

18-Aug 20-Oct

19-Aug 21-Oct

20-Aug 22-Oct

21-Aug 23-Oct

22-Aug 24-Oct

23-Aug 25-Oct

24-Aug 26-Oct

25-Aug 27-Oct

26-Aug 28-Oct

27-Aug 29-Oct

28-Aug 30-Oct

29-Aug 31-Oct

30-Aug 1-Nov

31-Aug 2-Nov

1-Sep 3-Nov

2-Sep 4-Nov

3-Sep 5-Nov

4-Sep 6-Nov

5-Sep 7-Nov

6-Sep 8-Nov

7-Sep 9-Nov

8-Sep 10-Nov

9-Sep 11-Nov

10-Sep 12-Nov

11-Sep 13-Nov

12-Sep 14-Nov

13-Sep 15-Nov

14-Sep 16-Nov

15-Sep 17-Nov

16-Sep 18-Nov

17-Sep 19-Nov

18-Sep 20-Nov

19-Sep 21-Nov

20-Sep 22-Nov

21-Sep 23-Nov

22-Sep 24-Nov

23-Sep 25-Nov

24-Sep 26-Nov

25-Sep 27-Nov

26-Sep 28-Nov

27-Sep 29-Nov

28-Sep 30-Nov

29-Sep 1-Dec

30-Sep 2-Dec

1-Oct 3-Dec

2-Oct 4-Dec

3-Oct 5-Dec

4-Oct 6-Dec

5-Oct 7-Dec

6-Oct 8-Dec

7-Oct 9-Dec

8-Oct 10-Dec

9-Oct 11-Dec

10-Oct 12-Dec

11-Oct 13-Dec

12-Oct 14-Dec

13-Oct 15-Dec

14-Oct 16-Dec

15-Oct 17-Dec

16-Oct 18-Dec

17-Oct 19-Dec

18-Oct 20-Dec

19-Oct 21-Dec

20-Oct 22-Dec

21-Oct 23-Dec

22-Oct 24-Dec

23-Oct 25-Dec

24-Oct 26-Dec

25-Oct 27-Dec

26-Oct 28-Dec

27-Oct 29-Dec

28-Oct 30-Dec

29-Oct 31-Dec

30-Oct 1-Jan

31-Oct 2-Jan

1-Nov 3-Jan

2-Nov 4-Jan

3-Nov 5-Jan

4-Nov 6-Jan

5-Nov 7-Jan

6-Nov 8-Jan

7-Nov 9-Jan

8-Nov 10-Jan

9-Nov 11-Jan

10-Nov 12-Jan

11-Nov 13-Jan

12-Nov 14-Jan

13-Nov 15-Jan

14-Nov 16-Jan

15-Nov 17-Jan

16-Nov 18-Jan

17-Nov 19-Jan

18-Nov 20-Jan

19-Nov 21-Jan

20-Nov 22-Jan

21-Nov 23-Jan

22-Nov 24-Jan

23-Nov 25-Jan

24-Nov 26-Jan

25-Nov 27-Jan

26-Nov 28-Jan

27-Nov 29-Jan

28-Nov 30-Jan

29-Nov 31-Jan

30-Nov 1-Feb

1-Dec 2-Feb

2-Dec 3-Feb

3-Dec 4-Feb

4-Dec 5-Feb

5-Dec 6-Feb

6-Dec 7-Feb

7-Dec 8-Feb

8-Dec 9-Feb

9-Dec 10-Feb

10-Dec 11-Feb

11-Dec 12-Feb

12-Dec 13-Feb

13-Dec 14-Feb

14-Dec 15-Feb

15-Dec 16-Feb

16-Dec 17-Feb

17-Dec 18-Feb

18-Dec 19-Feb

19-Dec 20-Feb

20-Dec 21-Feb

21-Dec 22-Feb

22-Dec 23-Feb

23-Dec 24-Feb

24-Dec 25-Feb

25-Dec 26-Feb

26-Dec 27-Feb

27-Dec 28-Feb

28-Dec 1-Mar

29-Dec 2-Mar

30-Dec 3-Mar

31-Dec 4-Mar