A pig pregnancy lasts about 114 days from the breeding date, which is 16 weeks and 2 days; most births fall between day 110 and day 117. Day 0 is the breeding date, so week 1 is days 0 to 6, week 2 is days 7 to 13, and so on.
How far along is your pig? Pick the breeding date: the calculator shows which day she is on, the days to go and every date on her schedule.
Bred on
Length (days)
114
Average: 114 days. Adjust it for your breed.
Due date
Wed, Jun 23, 2027
Usually Jun 19 – Jun 26, 2027 · 3 months, 3 weeks, 3 days
Milestones
💕
Bred
Day 0 · Mon, Mar 1, 2027
⏳
Halfway
Day 57 · Tue, Apr 27, 2027
🧺
About a week to go: get a clean, quiet birthing area ready
Day 107 · Wed, Jun 16, 2027
🎉
Due date (farrowing)
Day 114 · Wed, Jun 23, 2027
Week by week: days and dates
Dates for a pig bred on Mar 1, 2027. Pick your own breeding date in the calculator above.
Day 114: Due date (farrowing) · Day 117: Latest usual date
Week 1 (days 0–6): breeding
Day 0 is the breeding date. If she was bred on several days, the calculator counts from the first breeding and the usual window runs to the last breeding + 117 days.
The old rule “three months, three weeks and three days” is 114 days. Most sows farrow between day 110 and day 117 (Penn State Extension).
Weeks 2 to 8 (days 7–55)
Nothing on the schedule until day 57 (halfway, week 9). By day 55, 59 days are left to the due date.
Week 9 (days 56–62): halfway
Day 57 (Apr 27, 2027) is halfway through a 114-day pregnancy. From here, 57 days are left to the due date.
Weeks 10 to 15 (days 63–104)
Nothing on the schedule until day 107 (a week to go, week 16). By day 104, 10 days are left to the due date.
Week 16 (days 105–111): a week to go and the usual window opens
Day 107 (Jun 16, 2027) is one week before the due date. The schedule’s reminder for this day: get a clean, quiet birthing area ready.
Day 110 (Jun 19, 2027) is the earliest usual date: from here on, a birth is inside the usual range.
Week 17 (days 112–117): the due date and the usual window closes
Day 114 (Jun 23, 2027) is the due date, the average length counted from breeding. It is an estimate; most births fall between day 110 and day 117.
Day 117 (Jun 26, 2027) is the latest usual date. If that day passes, or anything about the mother worries you, call your veterinarian.
Frequently asked questions
How far along is my pig?
Count the days since the breeding date (the first one, if she was bred more than once). Days 0 to 6 are week 1, days 7 to 13 are week 2, and so on: day 57 is in week 9 and the due date, day 114, is in week 17. The calculator above counts it for you.
How many weeks is a pig pregnant?
About 114 days, which is 16 weeks and 2 days. Most births fall between day 110 (week 16) and day 117 (week 17).
When should the birthing area be ready?
The schedule marks day 107 (week 16), one week before the due date: get a clean, quiet birthing area ready. For a pig bred on Mar 1, 2027, that is Jun 16, 2027.
Where the numbers come from
Sources: Penn State Extension: Raising Pigs 1, Farrowing. Breeds and individual animals differ; change the length in the calculator if yours usually runs early or late. These dates are estimates, not veterinary advice: ask your veterinarian about your animal.