Home › Pig Gestation Calculator Pig Gestation Calculator Sows and gilts farrow about 114 days after breeding: 3 months, 3 weeks and 3 days. Enter the breeding date to get the farrowing date and the dates to watch for a return to heat.
Pig due date calculator One breeding date Boar in → boar out Work back from farrowing
Gestation length Standard (114 days, 3 months 3 weeks 3 days) Custom length… Breeding date
Pick a date to see the due date.
How the calculator works It adds the gestation length to the date you enter, counting calendar days (including leap days). The default for pig is 114 days. Change the length if your vet, breed society or sire information says otherwise. All calculations run in your browser; nothing you enter is sent anywhere.
Worked examples A sow bred on June 10, 2026, is due to farrow on October 2, 2026 . If she did not settle, watch for heat around July 1. Pig gestation facts Gestation 114 days Heat cycle About 21 days
Common questions What is the 3-3-3 rule? Three months, three weeks and three days is an easy way to remember 114 days. The calculator counts the exact days, so it handles short and long months for you.
Printable pig gestation chart Show the full farrowing table for every breeding date of the year Breeding year 2025 2026 2027 2028 Print this table
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Pig, 114-day gestation. Find the date the sow was bred in the left column; the expected farrowing date is on the right.
Bred in January 2026 Bred Due Jan 1 Apr 25 Jan 2 Apr 26 Jan 3 Apr 27 Jan 4 Apr 28 Jan 5 Apr 29 Jan 6 Apr 30 Jan 7 May 1 Jan 8 May 2 Jan 9 May 3 Jan 10 May 4 Jan 11 May 5 Jan 12 May 6 Jan 13 May 7 Jan 14 May 8 Jan 15 May 9 Jan 16 May 10 Jan 17 May 11 Jan 18 May 12 Jan 19 May 13 Jan 20 May 14 Jan 21 May 15 Jan 22 May 16 Jan 23 May 17 Jan 24 May 18 Jan 25 May 19 Jan 26 May 20 Jan 27 May 21 Jan 28 May 22 Jan 29 May 23 Jan 30 May 24 Jan 31 May 25
Bred in February 2026 Bred Due Feb 1 May 26 Feb 2 May 27 Feb 3 May 28 Feb 4 May 29 Feb 5 May 30 Feb 6 May 31 Feb 7 Jun 1 Feb 8 Jun 2 Feb 9 Jun 3 Feb 10 Jun 4 Feb 11 Jun 5 Feb 12 Jun 6 Feb 13 Jun 7 Feb 14 Jun 8 Feb 15 Jun 9 Feb 16 Jun 10 Feb 17 Jun 11 Feb 18 Jun 12 Feb 19 Jun 13 Feb 20 Jun 14 Feb 21 Jun 15 Feb 22 Jun 16 Feb 23 Jun 17 Feb 24 Jun 18 Feb 25 Jun 19 Feb 26 Jun 20 Feb 27 Jun 21 Feb 28 Jun 22
Bred in March 2026 Bred Due Mar 1 Jun 23 Mar 2 Jun 24 Mar 3 Jun 25 Mar 4 Jun 26 Mar 5 Jun 27 Mar 6 Jun 28 Mar 7 Jun 29 Mar 8 Jun 30 Mar 9 Jul 1 Mar 10 Jul 2 Mar 11 Jul 3 Mar 12 Jul 4 Mar 13 Jul 5 Mar 14 Jul 6 Mar 15 Jul 7 Mar 16 Jul 8 Mar 17 Jul 9 Mar 18 Jul 10 Mar 19 Jul 11 Mar 20 Jul 12 Mar 21 Jul 13 Mar 22 Jul 14 Mar 23 Jul 15 Mar 24 Jul 16 Mar 25 Jul 17 Mar 26 Jul 18 Mar 27 Jul 19 Mar 28 Jul 20 Mar 29 Jul 21 Mar 30 Jul 22 Mar 31 Jul 23
Bred in April 2026 Bred Due Apr 1 Jul 24 Apr 2 Jul 25 Apr 3 Jul 26 Apr 4 Jul 27 Apr 5 Jul 28 Apr 6 Jul 29 Apr 7 Jul 30 Apr 8 Jul 31 Apr 9 Aug 1 Apr 10 Aug 2 Apr 11 Aug 3 Apr 12 Aug 4 Apr 13 Aug 5 Apr 14 Aug 6 Apr 15 Aug 7 Apr 16 Aug 8 Apr 17 Aug 9 Apr 18 Aug 10 Apr 19 Aug 11 Apr 20 Aug 12 Apr 21 Aug 13 Apr 22 Aug 14 Apr 23 Aug 15 Apr 24 Aug 16 Apr 25 Aug 17 Apr 26 Aug 18 Apr 27 Aug 19 Apr 28 Aug 20 Apr 29 Aug 21 Apr 30 Aug 22
Bred in May 2026 Bred Due May 1 Aug 23 May 2 Aug 24 May 3 Aug 25 May 4 Aug 26 May 5 Aug 27 May 6 Aug 28 May 7 Aug 29 May 8 Aug 30 May 9 Aug 31 May 10 Sep 1 May 11 Sep 2 May 12 Sep 3 May 13 Sep 4 May 14 Sep 5 May 15 Sep 6 May 16 Sep 7 May 17 Sep 8 May 18 Sep 9 May 19 Sep 10 May 20 Sep 11 May 21 Sep 12 May 22 Sep 13 May 23 Sep 14 May 24 Sep 15 May 25 Sep 16 May 26 Sep 17 May 27 Sep 18 May 28 Sep 19 May 29 Sep 20 May 30 Sep 21 May 31 Sep 22
Bred in June 2026 Bred Due Jun 1 Sep 23 Jun 2 Sep 24 Jun 3 Sep 25 Jun 4 Sep 26 Jun 5 Sep 27 Jun 6 Sep 28 Jun 7 Sep 29 Jun 8 Sep 30 Jun 9 Oct 1 Jun 10 Oct 2 Jun 11 Oct 3 Jun 12 Oct 4 Jun 13 Oct 5 Jun 14 Oct 6 Jun 15 Oct 7 Jun 16 Oct 8 Jun 17 Oct 9 Jun 18 Oct 10 Jun 19 Oct 11 Jun 20 Oct 12 Jun 21 Oct 13 Jun 22 Oct 14 Jun 23 Oct 15 Jun 24 Oct 16 Jun 25 Oct 17 Jun 26 Oct 18 Jun 27 Oct 19 Jun 28 Oct 20 Jun 29 Oct 21 Jun 30 Oct 22
Bred in July 2026 Bred Due Jul 1 Oct 23 Jul 2 Oct 24 Jul 3 Oct 25 Jul 4 Oct 26 Jul 5 Oct 27 Jul 6 Oct 28 Jul 7 Oct 29 Jul 8 Oct 30 Jul 9 Oct 31 Jul 10 Nov 1 Jul 11 Nov 2 Jul 12 Nov 3 Jul 13 Nov 4 Jul 14 Nov 5 Jul 15 Nov 6 Jul 16 Nov 7 Jul 17 Nov 8 Jul 18 Nov 9 Jul 19 Nov 10 Jul 20 Nov 11 Jul 21 Nov 12 Jul 22 Nov 13 Jul 23 Nov 14 Jul 24 Nov 15 Jul 25 Nov 16 Jul 26 Nov 17 Jul 27 Nov 18 Jul 28 Nov 19 Jul 29 Nov 20 Jul 30 Nov 21 Jul 31 Nov 22
Bred in August 2026 Bred Due Aug 1 Nov 23 Aug 2 Nov 24 Aug 3 Nov 25 Aug 4 Nov 26 Aug 5 Nov 27 Aug 6 Nov 28 Aug 7 Nov 29 Aug 8 Nov 30 Aug 9 Dec 1 Aug 10 Dec 2 Aug 11 Dec 3 Aug 12 Dec 4 Aug 13 Dec 5 Aug 14 Dec 6 Aug 15 Dec 7 Aug 16 Dec 8 Aug 17 Dec 9 Aug 18 Dec 10 Aug 19 Dec 11 Aug 20 Dec 12 Aug 21 Dec 13 Aug 22 Dec 14 Aug 23 Dec 15 Aug 24 Dec 16 Aug 25 Dec 17 Aug 26 Dec 18 Aug 27 Dec 19 Aug 28 Dec 20 Aug 29 Dec 21 Aug 30 Dec 22 Aug 31 Dec 23
Bred in September 2026 Bred Due Sep 1 Dec 24 Sep 2 Dec 25 Sep 3 Dec 26 Sep 4 Dec 27 Sep 5 Dec 28 Sep 6 Dec 29 Sep 7 Dec 30 Sep 8 Dec 31 Sep 9 Jan 1, 2027 Sep 10 Jan 2, 2027 Sep 11 Jan 3, 2027 Sep 12 Jan 4, 2027 Sep 13 Jan 5, 2027 Sep 14 Jan 6, 2027 Sep 15 Jan 7, 2027 Sep 16 Jan 8, 2027 Sep 17 Jan 9, 2027 Sep 18 Jan 10, 2027 Sep 19 Jan 11, 2027 Sep 20 Jan 12, 2027 Sep 21 Jan 13, 2027 Sep 22 Jan 14, 2027 Sep 23 Jan 15, 2027 Sep 24 Jan 16, 2027 Sep 25 Jan 17, 2027 Sep 26 Jan 18, 2027 Sep 27 Jan 19, 2027 Sep 28 Jan 20, 2027 Sep 29 Jan 21, 2027 Sep 30 Jan 22, 2027
Bred in October 2026 Bred Due Oct 1 Jan 23, 2027 Oct 2 Jan 24, 2027 Oct 3 Jan 25, 2027 Oct 4 Jan 26, 2027 Oct 5 Jan 27, 2027 Oct 6 Jan 28, 2027 Oct 7 Jan 29, 2027 Oct 8 Jan 30, 2027 Oct 9 Jan 31, 2027 Oct 10 Feb 1, 2027 Oct 11 Feb 2, 2027 Oct 12 Feb 3, 2027 Oct 13 Feb 4, 2027 Oct 14 Feb 5, 2027 Oct 15 Feb 6, 2027 Oct 16 Feb 7, 2027 Oct 17 Feb 8, 2027 Oct 18 Feb 9, 2027 Oct 19 Feb 10, 2027 Oct 20 Feb 11, 2027 Oct 21 Feb 12, 2027 Oct 22 Feb 13, 2027 Oct 23 Feb 14, 2027 Oct 24 Feb 15, 2027 Oct 25 Feb 16, 2027 Oct 26 Feb 17, 2027 Oct 27 Feb 18, 2027 Oct 28 Feb 19, 2027 Oct 29 Feb 20, 2027 Oct 30 Feb 21, 2027 Oct 31 Feb 22, 2027
Bred in November 2026 Bred Due Nov 1 Feb 23, 2027 Nov 2 Feb 24, 2027 Nov 3 Feb 25, 2027 Nov 4 Feb 26, 2027 Nov 5 Feb 27, 2027 Nov 6 Feb 28, 2027 Nov 7 Mar 1, 2027 Nov 8 Mar 2, 2027 Nov 9 Mar 3, 2027 Nov 10 Mar 4, 2027 Nov 11 Mar 5, 2027 Nov 12 Mar 6, 2027 Nov 13 Mar 7, 2027 Nov 14 Mar 8, 2027 Nov 15 Mar 9, 2027 Nov 16 Mar 10, 2027 Nov 17 Mar 11, 2027 Nov 18 Mar 12, 2027 Nov 19 Mar 13, 2027 Nov 20 Mar 14, 2027 Nov 21 Mar 15, 2027 Nov 22 Mar 16, 2027 Nov 23 Mar 17, 2027 Nov 24 Mar 18, 2027 Nov 25 Mar 19, 2027 Nov 26 Mar 20, 2027 Nov 27 Mar 21, 2027 Nov 28 Mar 22, 2027 Nov 29 Mar 23, 2027 Nov 30 Mar 24, 2027
Bred in December 2026 Bred Due Dec 1 Mar 25, 2027 Dec 2 Mar 26, 2027 Dec 3 Mar 27, 2027 Dec 4 Mar 28, 2027 Dec 5 Mar 29, 2027 Dec 6 Mar 30, 2027 Dec 7 Mar 31, 2027 Dec 8 Apr 1, 2027 Dec 9 Apr 2, 2027 Dec 10 Apr 3, 2027 Dec 11 Apr 4, 2027 Dec 12 Apr 5, 2027 Dec 13 Apr 6, 2027 Dec 14 Apr 7, 2027 Dec 15 Apr 8, 2027 Dec 16 Apr 9, 2027 Dec 17 Apr 10, 2027 Dec 18 Apr 11, 2027 Dec 19 Apr 12, 2027 Dec 20 Apr 13, 2027 Dec 21 Apr 14, 2027 Dec 22 Apr 15, 2027 Dec 23 Apr 16, 2027 Dec 24 Apr 17, 2027 Dec 25 Apr 18, 2027 Dec 26 Apr 19, 2027 Dec 27 Apr 20, 2027 Dec 28 Apr 21, 2027 Dec 29 Apr 22, 2027 Dec 30 Apr 23, 2027 Dec 31 Apr 24, 2027
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Last reviewed 2026-10-21. Planning tool only. Confirm pregnancies and due dates with your veterinarian. See methodology .