🐹 Guinea Pig Pregnancy Calculator
Estimate how many days remain until a pregnant guinea pig (sow) gives birth, based on days since breeding and litter size.
What this calculator does
The Guinea Pig Pregnancy Calculator estimates how many days remain until a pregnant sow (female guinea pig) gives birth, based on days since breeding and the expected litter size.
The method it uses
Guinea pig gestation is unusually variable, typically ranging from about 59 to 72 days, and litter size is a major factor: smaller litters (1-2 pups) tend to gestate longer, around 70 days, while larger litters (5 or more pups) often arrive sooner, around 62 days. Average litters of 3-4 pups fall near 68 days. This calculator subtracts elapsed days from the expected total for the selected litter-size range.
Because gestation length varies more in guinea pigs than in many other pets, treat the result as a general estimate. This tool is for general planning purposes; consult a veterinarian or exotic-pet specialist for confirmed pregnancy staging.