What this site is
Livestock Calculators has 29 free tools for people who keep animals. Type a date or a size. The tool does the math.
You get a due date for your cow, mare, doe, ewe or sow, and the days to watch around it.
You do not need to sign up. Your saved work stays in your own browser.
Why you can trust the numbers
Every number on this site comes from research. Most of it is from university extension offices and the USDA. We name each source and link to it at the bottom of the page.
Animals differ, so we show a range, not just one day. When sources do not agree, we say so.
What we are not
We are not vets. This site does not give medical advice, and it has no medicine doses.
Our numbers are a good place to start. Ask your vet about the health of your animals.
Tell us
Did you find a wrong number? Do you want a new calculator? Write to us.