Pig Gestation / Due Date Calculator
Calculate the farrowing due date for a pig (sow) from the breeding date (gestation ~114 days), with pre-farrowing management reminders.
The classic '3 months, 3 weeks, 3 days' — a sow farrows at about 114 days, very predictably. Enter the breeding date to get the due date plus key pre-farrowing management reminders.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Livestock keepers and vets use the free Pig Gestation Calculator to mark the farrowing date and schedule dry-off, vaccination and pen moves in advance.
About Pig Gestation / Due Date Calculator
The classic '3 months, 3 weeks, 3 days' — a sow farrows at about 114 days, very predictably. This calculator turns the breeding (or AI) date into the expected farrowing date and a normal range, and lists the key pre-farrowing jobs — so nothing is missed. Pig (sow) gestation averages about 114 days; enter the service date and the tool counts forward, also flagging when to prepare for the birth. Knowing the date protects both dam and offspring and lets you plan labour and facilities.
How to use Pig Gestation / Due Date Calculator
- 1Enter the breeding / AI / service date.
- 2Read the expected farrowing date and the earliest–latest range.
- 3Note the pre-birth management dates and plan accordingly.
Why use Pig Gestation / Due Date Calculator?
- ✓Uses the correct ~114-day gestation for pig (sow)
- ✓Gives the expected farrowing date and a normal range
- ✓Lists pre-birth management reminders (dry-off, vaccination, pen move)
- ✓Free, instant and fully in-browser
Frequently asked questions
How long is the gestation period of a pig?+
About 114 days on average (± 2 days is normal). The classic '3 months, 3 weeks, 3 days' — a sow farrows at about 114 days, very predictably.
How do I calculate the farrowing date?+
Add the gestation length (~114 days) to the breeding date. This tool does it instantly and also marks a normal range, since births a few days either side of average are common.
What should I do before farrowing?+
Prepare a clean, quiet birthing area, ensure pre-birth vaccination and (for dairy animals) timely dry-off. The tool lists these dates counted back from the due date so you can schedule them.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline at the farm and your data never leaves the device.
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