Predict your cat due window from mating dates with clinical accuracy using feline gestation math. Get the average delivery day early and late ranges milestone timelines vet visit reminders litter planning checklist and automatic calendar export for peace of mind including nutrition guidance temperature drop alerts queening supply list multi mating support built in
Each mating date is shifted by your chosen gestation lengths to produce early, average, and late estimates. For multiple matings, the overall window spans the earliest early date to the latest late date, while the average due is calculated from the most recent mating.
1) What if I do not know the exact mating day?
Use the best estimate and consider entering a range of likely dates as separate rows to widen the window.
2) Which date should I trust the most?
When there are multiple matings, many breeders plan around the average due from the last mating while monitoring the entire window.
3) Do breeds differ in gestation length?
Differences are small. Nutrition, litter size, and individual variation matter more than breed in most cases.
4) What signs suggest labor is close?
Nesting behavior, reduced appetite, and a rectal temperature drop to ~37.2°C or lower within 12–24 hours can precede labor.
5) Is going beyond the late window dangerous?
It can be. Contact a veterinarian promptly if the queen passes the late date or shows unusual discharge or lethargy.
6) Can I add these dates to my phone calendar?
Yes. Use the Add average due to calendar button to download an event file for quick import.
7) How accurate is this calculator?
It reflects typical ranges and math. Only a veterinarian can assess fetal health and precise timing with exams and imaging.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.