Last updated: May 25, 2026
Cat Pregnancy Calculator
Creators
Dharmendra SinghReviewers
Creators
Dharmendra SinghReviewers
Quick Answer
The Cat Pregnancy Calculator predicts a queen's kittening (due) date from the mating date and breed using Due Date = Mating Date + gestation days. Feline gestation averages 63 days (range 60-67), with oriental and longhair breeds such as Siamese, Persian and Maine Coon carrying up to 65 days. The calculator also reports days pregnant, days remaining, the current stage, and progress, and the guide covers confirming pregnancy, nutrition, labor signs, and emergency warning signs.
Cats are pregnant for about 63 days, or roughly nine weeks, ranging from 60 to 67 days depending on breed. To find your cat's due date, add 63 days to the mating date. Siamese, Persian and Maine Coon queens may carry up to 65 days.
Key Takeaways
- Average cat gestation is 63 days (~9 weeks), ranging from 60-67 days
- Oriental breeds (Siamese, Persian) tend to have 65-day gestation
- Nipples 'pinking up' at day 15-18 is the first visible sign of pregnancy
- Temperature drop below 100°F signals labor within 24 hours
- X-ray after day 42 gives the most accurate kitten count
Creators
Dharmendra SinghReviewers
Creators
Dharmendra SinghReviewers
Formula
Due Date = Breeding Date + 63 days
Where:
- D_{kittening}=Expected kittening (due) date(date)
- D_{mating}=Date of successful mating(date)
- 63=Average feline gestation period(days)
Worked Examples
Domestic Cat — Standard Gestation
A domestic shorthair mated on March 15, 2026
- 1Mating date: March 15, 2026
- 2Domestic shorthair gestation: 63 days
- 3Due date = March 15 + 63 days = May 17, 2026
Siamese — Longer Gestation
A Siamese queen mated on April 1, 2026
- 1Mating date: April 1, 2026
- 2Siamese gestation: 65 days
- 3Due date = April 1 + 65 days = June 5, 2026
Persian — First-Time Queen
A Persian queen in her first pregnancy, mated on May 10, 2026
- 1Mating date: May 10, 2026
- 2Persian gestation: 65 days
- 3Due date = May 10 + 65 days = July 14, 2026
- 4First-time queens may deliver 1-2 days late — monitor until day 67
Introduction
The Cat Pregnancy Calculator predicts your queen's kittening date based on mating date and breed. The average feline gestation period is 63 days (approximately 9 weeks), ranging from 60-67 days. Oriental breeds (Siamese, Persian) tend to have slightly longer gestation. Knowing the exact due date helps you prepare a nesting area, monitor for complications, and ensure veterinary support is available. For other animal pregnancy tools, see our dog pregnancy calculator and rabbit gestation calculator.
Cat Gestation Periods by Breed
While 63 days is the standard average, certain breeds have slightly shorter or longer gestation periods. Larger breeds and oriental breeds tend to carry slightly longer.
| Breed | Average (days) | Range (days) | Type |
|---|---|---|---|
| Sphynx | 62 | 60-64 | Hairless |
| Bengal | 63 | 61-65 | Hybrid |
| British Shorthair | 63 | 61-65 | Shorthair |
| Abyssinian | 63 | 61-65 | Shorthair |
| Domestic Shorthair | 63 | 61-65 | Mixed |
| Ragdoll | 64 | 62-66 | Longhair |
| Siamese | 65 | 63-67 | Oriental |
| Persian | 65 | 63-67 | Longhair |
| Maine Coon | 65 | 63-67 | Longhair |
Stages of Cat Pregnancy
Cat pregnancy is divided into three periods with distinct changes.
- Weeks 1-3 (Days 1-21):
Implantation occurs around day 10-12. Nipples become pink ('pinking up') around day 15-18. Queen may have morning sickness and reduced appetite.
- Weeks 4-6 (Days 22-42):
Belly begins to swell, weight gain of 1-2 kg visible. Ultrasound confirms pregnancy at day 21-25. Increase food by 25%. X-ray possible after day 42 to count kittens.
- Weeks 7-9 (Days 43-63):
Rapid kitten growth — 70% of birth weight gained in final 3 weeks. Mammary glands enlarge with milk. Queen seeks nesting spots. Kittens can be felt moving after day 50.
Nutrition During Cat Pregnancy
Proper nutrition is critical for healthy kitten development and the queen's wellbeing.
- Weeks 1-3:
No dietary changes needed. Maintain regular high-quality adult food. Ensure fresh water always available.
- Weeks 4-6:
Switch to kitten food (higher protein 35%+ and calories). Increase daily portions by 25%. Add taurine-rich foods (essential for fetal heart/eye development).
- Weeks 7-9:
The queen may need 50-75% more calories. Feed smaller, more frequent meals as the growing kittens compress the stomach. Free-feed kitten food.
- Supplements:
Folic acid supports neural development. Avoid excess vitamin A (liver toxicity). No raw meat (Toxoplasma risk).
Do NOT restrict food in the last 3 weeks — underfeeding causes low birth weight kittens and increases risk of eclampsia (milk fever) post-birth.
Signs of Approaching Labor
Monitor your queen closely in the final week for these progressive signs of labor.
- 1 week before:
Mammary glands produce colostrum (yellowish first milk). Queen becomes increasingly affectionate or withdrawn.
- 24-48 hours:
Rectal temperature drops from normal 101.5°F (38.6°C) to below 100°F (37.8°C). This is the most reliable predictor.
- 12-24 hours:
Restlessness, excessive grooming of vulva, vocalization, loss of appetite, nesting behavior intensifies.
- Active labor (Stage 1):
Visible contractions, panting, kneading, seeking dark quiet places. Lasts 6-12 hours for first-time mothers.
- Delivery (Stage 2):
First kitten within 1 hour of active pushing. Subsequent kittens every 15-60 minutes. Total delivery 2-6 hours for average litter.
- Afterbirth (Stage 3):
Each placenta passes within 15 minutes of each kitten. Count placentas — retained placentas cause infection.
When to Call the Vet — Emergency Signs
Most cat births proceed normally, but know these warning signs that require immediate veterinary attention.
Active straining for 30+ minutes with no kitten delivered (dystocia)
More than 2 hours between kittens with visible contractions
Bloody or foul-smelling greenish discharge before first kitten
Queen appears exhausted, weak, or collapses during labor
Pregnancy exceeds 67 days from confirmed mating date
Kitten partially visible but stuck for more than 10 minutes
Queen's temperature above 104°F (40°C) indicating infection
Keep your veterinarian's emergency after-hours number posted near the nesting area from day 58 onward.
How to Confirm Your Cat Is Pregnant
You cannot reliably confirm pregnancy at home in the first two weeks. The earliest visible sign is 'pinking up' of the nipples around day 15-18, but veterinary methods give a definitive answer and a kitten count. The table below shows what each method can tell you and when.
| Method | Earliest Day | What It Confirms |
|---|---|---|
| Nipple 'pinking up' | 15-18 | Suggestive only — pink, enlarged nipples |
| Abdominal palpation (vet) | 17-25 | Pregnancy and rough fetus count (skilled vet) |
| Ultrasound | 21-25 | Confirms pregnancy and viability (heartbeats) |
| Relaxin blood test | 25-30 | Hormone test confirming a viable pregnancy |
| X-ray (radiograph) | 42-45 | Most accurate kitten COUNT (skeletons calcify) |
Avoid firm abdominal pressing at home — improper palpation can injure developing kittens or cause miscarriage. Leave palpation to your veterinarian.
Preparing for the Birth: Kittening Kit
Have a kittening kit assembled and the nesting box set up by day 55 so the queen is settled and you are ready if labor starts early. Keep everything in one container near the nesting area.
Large nesting box lined with clean, washable towels and disposable pads
Clean towels for drying and stimulating newborn kittens
Digital thermometer and water-based lubricant to track the pre-labor temperature drop
Kitchen/gram scale to weigh each kitten at birth and daily afterward
Clean scissors and unwaxed dental floss (to tie umbilical cords only if the queen does not)
Bulb syringe to gently clear a kitten's airways if needed
Heating pad or heat lamp set to LOW for warmth (kittens cannot regulate temperature)
Kitten milk replacer (never cow's milk) and a feeding bottle in case the queen cannot nurse
Your vet's and an emergency clinic's phone numbers posted nearby
Weigh each kitten at birth and every day for the first 2 weeks. Steady daily weight gain (about 7-10 g/day) is the single best sign that a newborn kitten is thriving.
Postpartum Care of the Queen and Kittens
The first three weeks after birth are critical. Keep the family warm, quiet, and undisturbed, and watch both the queen and the kittens closely for problems.
Provide the nursing queen unlimited high-calorie kitten food — lactation can require 2-3× her normal calories
Keep the nest at 85-90°F (29-32°C) for the first week; chilled kittens cannot nurse
Confirm every kitten nurses within the first few hours to receive antibody-rich colostrum
Watch the queen for mastitis (hot, painful mammary glands) and eclampsia (milk fever): tremors, restlessness, weakness — a medical emergency
Check that all placentas were passed; a retained placenta causes infection (fever, dark discharge)
Schedule a post-birth vet check and discuss spaying — queens can come back into heat within 1-2 weeks of giving birth
Eclampsia (low blood calcium) usually strikes 1-4 weeks after birth in queens nursing large litters. If you see muscle tremors, stiffness, or disorientation, treat it as an emergency and call your vet immediately.
Quick Reference Card
Cat Pregnancy — Quick Reference
Quick reference • Cat Pregnancy Calculator
Due Date = Mating Date + 63 days (±4 days)Valid range: 60–67 days depending on breed
Common Values
⚠ Watch Out
- •No kitten after 1 hour of active pushing = veterinary emergency
- •Bloody/green discharge without delivery = emergency
- •Queen straining without result for 30+ minutes = emergency
- •Pregnancy exceeding 67 days from confirmed mating = emergency
Pro Tips
- →Provide nesting box in quiet, warm area by day 55
- →Feed kitten food from week 4 — higher calories for growing babies
- →Keep vet emergency number ready from day 58 onward
- →Take rectal temperature twice daily from day 60 to detect labor onset
FAQs
How long are cats pregnant?
Cats are pregnant for approximately 63-65 days (about 9 weeks). The range is 60-67 days. Oriental breeds like Siamese may go up to 67 days, while shorter-haired breeds typically deliver at 63 days.
How many kittens can a cat have?
The average litter size is 4-6 kittens. First-time mothers often have smaller litters (2-3). The range is 1-12, with the record being 19 kittens in a single litter.
Can I tell how many kittens my cat is having?
Ultrasound at day 21-25 can confirm pregnancy and estimate numbers. X-ray after day 42 (when skulls calcify) gives the most accurate count of kittens.
What should I feed my pregnant cat?
Switch to high-quality kitten food from week 4 onward — it has more protein (35%+) and calories needed for developing kittens. In the last 3 weeks, free-feed as the queen needs 50-75% more calories. Ensure adequate taurine (essential for fetal heart and eye development).
Can a cat be pregnant and in heat at the same time?
No. Once pregnant, cats stop cycling. However, queens can go into heat as early as 1-2 weeks after giving birth, even while nursing. This is why post-birth spaying is recommended.
How do I prepare a nesting box for my cat?
Provide a quiet, warm, dark area with a box large enough for her to lie stretched out. Line it with clean towels or newspaper (easily changed). Place it in position by day 55 so she accepts it. Keep food, water, and a litter box nearby.
Is it normal for cats to eat the placenta?
Yes, this is normal instinctive behavior. The placenta contains nutrients and hormones that stimulate milk production. However, eating too many can cause vomiting — remove extras if she has a large litter.
When can I touch newborn kittens?
You can briefly handle kittens from day 1 to check health (weight, warmth, nursing). Regular gentle handling from 2 weeks onward aids socialization. Most queens tolerate handling by trusted humans immediately.
How early can you tell if a cat is pregnant?
The earliest at-home clue is 'pinking up' — the nipples become pink and enlarged around day 15-18. A veterinarian can confirm pregnancy by abdominal palpation from about day 17-25, by ultrasound from day 21-25 (which also checks for heartbeats), and can count kittens most accurately by X-ray after day 42.
Can you spay a cat while she is pregnant?
Yes, a pregnant cat can be spayed, which also ends the pregnancy. Many shelters and vets do this for population control, ideally in early to mid pregnancy when it is safest. It is a personal and ethical decision — discuss the timing, risks, and your options with your veterinarian.
Do cats get morning sickness during pregnancy?
Some queens do. Around weeks 3-4, hormonal changes and a stretching uterus can cause a few days of reduced appetite or occasional vomiting. It is usually mild and short-lived. If vomiting is frequent, severe, or the queen stops eating entirely, contact your veterinarian.
How soon after giving birth can a cat get pregnant again?
Surprisingly soon — a queen can return to heat and become pregnant within 1-2 weeks of giving birth, even while still nursing her current litter. This is why veterinarians strongly recommend spaying after weaning to prevent back-to-back litters that exhaust the mother.