Pregnancy calculator for Guinea pigs

Answers the question: When is the birth date for my pregnant guinea pig?

Pregnancy in guinea pigs normally lasts 64 days, but can be as quick as 59 days and as long as 72 days. This pregnancy calculator for guinea pigs will calculate the most likely birth date using the mating date as a starting point.


Most likely birth date: May 27
Earliest birth date: May 22
Latest birth dates: June 4

Remember that these dates are estimates and that an incorrectly entered mating date can significantly affect the estimates.