Swine Gestation Calculator

Swine Gestation Calculator. Pig gestation lasts about 114 days, and the Swine Gestation Calculator takes the guesswork out of predicting when a sow will farrow (give birth). Enter the breeding date and adjust the gestation period (112–120 days) to get the expected farrowing date and a countdown in days. Secondary outputs include the premature farrowing range start and the normal farrowing range end, so you can plan monitoring and farrowing pen prep with confidence. Also try the Goat Gestation Calculator.

Breeding Date *

Select the date when the pig was bred

Gestation Period (Days)

days

Standard pig gestation is 114 days (range: 112-120 days)

Results

Expected Farrowing Date

Days Until Farrowing

Premature Farrowing Range Start

Normal Farrowing Range End

How long is a pig's gestation period?

A pig's gestation period is typically 112-120 days, with the average being 114 days. Both domestic standard breeds and miniature pig breeds have the same gestation period. See also our Dog Heat Cycle Calculator.

What is considered premature farrowing in pigs?

Premature farrowing occurs when piglets are born between 109 and 112 days of gestation. If a pig farrows before the 109th day, it's considered an abortion.

How many piglets can a pig have?

A pig can have anywhere from 6 to 12 piglets in a litter, with the average being around 8-10 piglets. The number can vary based on the breed, age, and health of the sow.

How old does a pig have to be to breed?

Pigs can typically be bred when they reach 8-12 months of age and weigh at least 250-300 pounds. It's important to ensure the pig is physically mature before breeding.

How many months is 114 days of pig pregnancy?

114 days equals approximately 3 months and 3 weeks. This makes pig pregnancy roughly 3.7 months, which is much shorter than many other mammals.

How long are mini pigs pregnant?

Mini pigs have the same gestation period as standard pigs - 112 to 120 days, with an average of 114 days. The breed size doesn't affect the pregnancy duration.

When should I prepare for my pig to give birth?

You should prepare for farrowing about a week before the expected date. Set up a clean, warm farrowing area and have supplies ready, as pigs can farrow anywhere within the 112-120 day range.

What signs indicate a pig is about to farrow?

Signs include restlessness, nesting behavior, loss of appetite, swollen vulva, and milk production. The pig may also isolate herself and show signs of discomfort as labor approaches. You might also find our calculate Expected Due Date, Days Until Due Date & Weeks Until Due Date — Llama Gestation useful.