Species Profile
Capra hircus
- Average Gestation150 Days (approx. 5 months)
- Normal Range145 to 155 Days
- Kids per Kidding1 to 3 (Twins most common)
Gestation length can vary slightly by breed (e.g., Nigerian Dwarfs may kidding slightly earlier). Always consult your livestock veterinarian.
Related Expert Tools
More precision tools in the animal-pregnancy niche.
Dog Pregnancy Calculator
The Dog Pregnancy Calculator estimates the expected whelping date and tracks developmental milestones throughout canine gestation based on the date of breeding or confirmed ovulation. Canine gestation averages 63 days from the LH surge, which falls within a normal range of 58 to 68 days from the mating date. Use it to prepare your whelping box, schedule prenatal veterinary appointments, and track fetal development week by week.
Goat Gestation Calculator
The Goat Gestation Calculator estimates the kidding date by adding the standard goat gestation period of 150 days to the confirmed breeding or mating date. Gestation in goats ranges from 145 to 155 days depending on the breed, litter size, and individual variation. Use it to plan your kidding season, schedule prenatal nutrition changes, and prepare your kidding pen with the right lead time.
Cow Gestation Calculator
The Cow Gestation Calculator works out the expected calving date from the breeding or service date and breed. Cattle gestation averages 279 to 290 days depending on breed. Use it to plan pre-calving nutrition, vaccination schedules, and calving pen preparation.
Cat Pregnancy Calculator Logic
What Is the Cat Pregnancy Calculator?
The Cat Pregnancy Calculator works out the expected queening date by adding the breed-specific gestation period to the mating date you enter. Veterinarians, breeders, and cat owners use it to figure out when to prepare a nesting area, schedule ultrasound scans, and plan pre-birth veterinary appointments. According to the American Veterinary Medical Association, feline gestation averages 63 to 67 days from the first mating, with 65 days as the most commonly cited midpoint across domestic breeds.
Given that queens can mate multiple times over several days, and that ovulation in cats is induced by the act of mating, pinning down the exact conception date can be tricky. That said, the first recorded mating date remains the most practical starting point for carrying out a due-date estimate. In practice, most queens deliver within a three-to-four day window around the calculated date.
Feline Gestation Period by Breed
Breed type influences how long a cat carries her kittens. Domestic short-hair queens are the most studied population and typically deliver at 63 to 65 days. Long-hair breeds such as Persians and Norwegian Forest Cats can carry up to 68 days without clinical concern. The table below sets out the normal ranges published in veterinary literature and reported by registered breeders on forums including r/CatBreeding.
| Breed | Min Days | Average Days | Max Days |
|---|---|---|---|
| Domestic (short-hair/mixed) | 63 | 65 | 67 |
| Siamese | 63 | 64 | 66 |
| Persian | 64 | 66 | 68 |
| Maine Coon | 63 | 65 | 68 |
| Ragdoll | 63 | 65 | 67 |
| Bengal | 63 | 65 | 66 |
Key Milestones During Cat Pregnancy
Understanding what happens week by week helps you carry out the right care at the right time. Around day 21, the nipples enlarge and turn a rosy pink colour — breeders call this "pinking up" and it is one of the earliest visible signs of pregnancy. By day 28 an experienced veterinarian can palpate the uterus to count fetuses, and ultrasound confirms heartbeats from around the same point. On top of that, the Merck Veterinary Manual notes that fetal skeletons become visible on X-ray from around day 44, which is the most reliable method for confirming litter size before birth.
Nesting behaviour typically begins in the final 7 to 10 days. Queens will look into quiet corners, pull at bedding, and become more vocal or clingy. With that in mind, set up the nesting box at least 10 days before the expected due date so the queen has time to accept it as her space before labour begins.
Nutrition and Care During Feline Gestation
Switching to a high-calorie kitten formula from week 4 onwards supports both the queen and the growing fetuses. The energy requirement increases by approximately 25% in the second half of pregnancy. What is more, calcium intake becomes critical in the final trimester to prevent post-partum hypocalcaemia (milk fever), a condition that turns up most often in queens nursing large litters. Fresh water should always be available, and vitamin C supplementation is not required for cats, as they synthesise it internally.
Accuracy and Limitations
This calculator is accurate when the mating date is known precisely. Because cats are induced ovulators, a mating that does not trigger ovulation will not result in pregnancy, so the actual conception date may differ from the first mating date by one to two days. The calculator does not account for superfetation (a rare second pregnancy while the first is ongoing) or for individual variation in queens with irregular cycles.
If your queen reaches day 70 without giving birth and shows no signs of labour, contact a veterinarian immediately. Prolonged gestation beyond 68 to 70 days significantly increases the risk of fetal death and uterine complications. The Merck Veterinary Manual is the authoritative clinical reference for feline dystocia and prolonged gestation.
The Most Common Cat Pregnancy Calculation Mistake
The error I see most often is counting from the last mating date rather than the first. Because queens can mate over three to five days, owners who record only the final mating end up with a due date that is two to four days later than reality. With that in mind, always log the first confirmed mating date and use that as your baseline. This mistake turns up most often with multi-male breedings or free-roaming queens where the breeding date is uncertain.
Frequently Asked Questions
Muhammad Shahbaz Siddiqui
Founder, TheCalculatorsHub
How I helped track an unexpected cat pregnancy from mating date to kittening
In March 2026, a reader emailed after their indoor cat had slipped outside briefly on February 28 and shown signs of mating. She was unsure whether pregnancy had occurred and, if so, when to expect kittening. She asked whether the calculator would be useful before a vet visit confirmed anything.
I ran February 28 through the calculator using the standard 65-day feline gestation. The Merck Veterinary Manual's feline parturition reference puts normal kittening at 63 to 67 days from mating, with most queens delivering on day 65. The calculator returned an expected kittening window of May 3 to May 6. A vet ultrasound at three weeks confirmed pregnancy. The reader set up a kittening box on April 26 and the queen delivered four kittens on May 4, exactly in the middle of the predicted range.