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Cat Pregnancy Calculator (Due Date & Week-by-Week)
This Cat Pregnancy Calculator estimates where your queen is in her pregnancy, an approximate due date and which week-by-week changes to expect. It’s a simple way to understand the overall timeline and prepare your home, without replacing veterinary care.
Estimate your cat’s pregnancy timeline
Enter the date of mating (or the first date you’re confident mating could have happened) to see:
- Estimated gestation day and pregnancy week
- Approximate due date range
- Key signs you may notice around this stage
Cat Pregnancy Calculator
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This tool is for educational purposes only and cannot confirm pregnancy or litter health. Always consult a veterinarian for diagnosis, ultrasound, X-rays and medical decisions.
Example
Mating ~30 days ago
- Gestation day: around day 30–32.
- Stage: mid-pregnancy (roughly week 4–5).
- Common signs: pinking of nipples, weight gain, more resting.
How to read your cat’s pregnancy estimate
1. Dates are approximate
Most cats deliver between day 63 and 66, but normal litters can arrive a little earlier or later. The calculator provides a range, not a guaranteed date.
2. Signs vary between cats
Some queens show strong appetite changes, nesting behaviors or personality shifts; others stay subtle. Use the estimate as a guideline, not a strict checklist.
3. Vet checks are still essential
A vet can confirm pregnancy, check for complications, estimate litter size closer to term and advise you on safe nutrition and environment during gestation.
Need a week-by-week guide?
After using the calculator, read the full pregnancy stages guide to see what to expect at each week and how to prepare safely.