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Farrowing Calculator

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In the world of pig farming, timing is crucial, especially when it comes to the breeding and birthing processes of pigs, or sows. To assist farmers in planning and managing these events, a tool known as the “Farrowing Calculator” proves invaluable. This straightforward calculator helps predict the farrowing date, which is the day a sow is expected to give birth.

What is a Farrowing Calculator?

A Farrowing Calculator is a simple, yet effective tool designed to predict the date on which a sow will farrow, or give birth to piglets. The calculation is based on the date the sow was bred. Knowing the farrowing date is crucial for farmers as it helps them provide the best care for the sows during the critical period of gestation.

How Does It Work?

The principle behind the Farrowing Calculator is based on a fixed gestation period common to most sows. The typical gestation period for a pig is about 114 days. Therefore, to find out when a sow will likely give birth, you simply add 114 days to the date she was bred.

Formula: Farrowing Date=Breeding Date+114 daysFarrowing Date=Breeding Date+114 days

Steps to Use the Calculator:

  1. Input the breeding date of the sow.
  2. Add 114 days to this date.
  3. The resulting date is the expected farrowing date.

Example: If a sow was bred on January 1st, 2024:

Farrowing Date=January 1st, 2024+114 days=April 25th, 2024Farrowing Date=January 1st, 2024+114 days=April 25th, 2024

This date tells the farmer when to expect the sow to give birth.

Example and Table of Information

To further illustrate, let’s consider a few more examples with different breeding dates:

Breeding DateFarrowing Date
March 1, 2024July 24, 2024
June 15, 2024October 7, 2024
September 10, 2024January 2, 2025


The Farrowing Calculator is a vital tool for pig farmers, helping them to efficiently manage the breeding cycle of their sows. By predicting farrowing dates accurately, farmers can prepare the necessary environment and care needed for the sows and the upcoming piglets. This preparation enhances the health and productivity of the pigs, ultimately contributing to the success of the farming operations. With such tools, managing large herds becomes more organized and less stressful, allowing farmers to focus on other critical aspects of farm management.

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