Cat Pregnancy Due Date Calculator
Calculate your cat's due date from the mating date using the 63-day average gestation period. Free cat pregnancy calculator with due date range, week-by-week tracking, and timeline chart.
About This Calculator
The Cat Pregnancy Due Date Calculator helps cat owners and breeders determine when their cat will give birth based on the mating date. Using the average feline gestation period of 63 days, the calculator provides the expected due date along with the full possible delivery range between 58 and 71 days after mating.
The calculation is based on the well-established veterinary formula: Due Date = Mating Date + 63 days. While 63 days (approximately 9 weeks) is the average gestation period for domestic cats, the actual delivery can occur anytime between 58 and 71 days depending on factors such as breed, litter size, and individual variation. The calculator provides the earliest (day 58), expected (day 63), and latest (day 71) due dates to give you a complete delivery window.
Cat pregnancy progresses through three trimesters. The first trimester (weeks 1-3) covers fertilization and implantation, with early signs like nipple swelling appearing around day 15-18. The second trimester (weeks 4-6) brings visible belly enlargement and the ability to detect kitten movement. The third trimester (weeks 7-9) involves nesting behavior and preparation for birth. This calculator works for all domestic cat breeds including Persian, Siamese, Bengal, Maine Coon, and mixed breeds.
Regional Notes
The cat gestation period of 63 days is a universal veterinary standard that applies worldwide, regardless of region. Cat owners in India, the United States, the United Kingdom, and all other countries can use this calculator with confidence. The date format displayed will match your browser's locale settings automatically.
Frequently Asked Questions
How long are cats pregnant?
Cats are pregnant for approximately 63 days on average, though the normal gestation range is between 58 and 71 days. The cat pregnancy length can vary by breed, litter size, and individual factors, but 63 days (about 9 weeks) is the standard estimate used by veterinarians.
How do I calculate my cat's due date?
Enter the mating date into the calculator and it will add 63 days to determine the expected due date. The calculator also shows the earliest possible date (day 58) and latest possible date (day 71) to give you a full delivery window. For best accuracy, consult your veterinarian to confirm the pregnancy and due date.
Can I feel kittens moving in a pregnant cat?
You should avoid touching the pregnant cat's belly as it can hurt both the mother and the kittens. After about 3-4 weeks, a veterinarian can feel small bumps similar to a beads chain in the cat's belly — these are the developing kittens. Later in pregnancy, you may be able to see the kittens moving.
How can I tell if my cat is pregnant?
Common signs of cat pregnancy include swollen and reddened nipples within 15-18 days of mating, a enlarging abdomen after 2-3 weeks, weight gain of up to 2 kg (4.4 lb), and cessation of heat cycles. A veterinary examination or ultrasound provides the most reliable confirmation of pregnancy.
How many kittens can a cat have?
The average litter size for cats is 4 to 6 kittens, though first-time mothers typically have smaller litters. Litter size can range from 1 to 12 kittens depending on the breed, age, and health of the mother cat. Persian and Siamese cats tend to have smaller litters, while mixed-breed cats may have larger ones.
What are the stages of cat pregnancy week by week?
Cat pregnancy is divided into three trimesters. First trimester (weeks 1-3): mating, fertilization, and implantation; nipples become pink and swollen. Second trimester (weeks 4-6): visible belly enlargement, kittens begin moving, increased appetite. Third trimester (weeks 7-9): significant weight gain, nesting behavior, milk production, and finally delivery around day 63.
When should I take my pregnant cat to the vet?
Take your pregnant cat to the vet within 2-3 weeks of suspected mating for confirmation of pregnancy. A follow-up visit around week 5-6 can help assess kitten development and health. If you notice any concerning symptoms like lethargy, discharge, or loss of appetite, contact your veterinarian immediately regardless of the stage.
Is this calculator free?
Yes, it is completely free to use with no registration required. The URL saves your inputs so you can share the calculation with your veterinarian or family members.