Observed arrival · 2026-10-24
Tally Book’s farm gestation calculators
A free set of gestation calculators and planning tools for cattle, sheep, goats, horses, and other farm animals.
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- Farmers planning livestock breeding and birthing dates
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- The cattle range is attributed to the shortest and longest records in a 2024 study; the alpaca range covers the middle half of 7,049 pregnancies.
Field notes
Cattle calculations offer a standard 283-day length, named breed options, and a custom length; the page also provides ways to work backward from calving or calculate bull-in and bull-out dates. Its listed cattle range is attributed to a 2024 study, while the alpaca and llama range is described as the middle half of 7,049 pregnancies. A veterinary confirmation disclaimer appears at the bottom.
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