Cat Due Date Calculator: Estimate When Your Cat Will Give Birth

Enter the date of mating or conception to calculate your cat’s expected due date.

How to Estimate a Cat’s Due Date

Feline pregnancy is a relatively short but critical period. The average gestation period for a cat is approximately 63 to 65 days (about 9 weeks), though it can range from 58 to 72 days. Knowing when your cat mated or was exposed to a male can help you estimate her delivery date and prepare for the arrival of kittens.

Key Milestones in Cat Pregnancy

  • Day 0: Mating or fertilization
  • Days 10–14: Embryo implantation in the uterus
  • Days 20–25: Possible detection of pregnancy via ultrasound
  • Days 30–35: Visible weight gain and nipple changes
  • Day 42+: Noticeable abdomen growth; fetal movement felt
  • Day 58+: Nesting behavior and delivery preparation

How to Confirm Pregnancy

If you’re unsure whether your cat is pregnant, consult a veterinarian for an ultrasound or physical examination. Signs of feline pregnancy include:

  • Pink, enlarged nipples (“pinking up”)
  • Increased appetite
  • Behavioral changes (more affectionate or withdrawn)
  • Weight gain and swollen belly

Preparing for the Birth

As your cat nears her due date, prepare a safe, quiet nesting area. Line it with clean towels and keep it in a low-traffic part of the home. Your cat may choose her own spot, so try to make multiple comfortable options available.

You’ll also want to prepare:

  • Clean cloths or paper towels
  • A heat source (like a heating pad set on low)
  • A scale to weigh the kittens
  • Your vet’s emergency number

Signs That Labor is Near

  • Restlessness or pacing
  • Vocalization or excessive grooming
  • Nesting behavior or staying in the whelping area
  • Drop in body temperature below 100°F (37.8°C)

What to Expect During Delivery

Most cats give birth without assistance. Labor is divided into three stages:

  1. First stage: Uterine contractions begin, cervix dilates; may last 6–12 hours.
  2. Second stage: Kittens are delivered, typically 30–60 minutes apart.
  3. Third stage: Placentas are expelled; should follow each kitten.

If your cat strains for more than an hour without producing a kitten, or if you notice foul-smelling discharge, contact your veterinarian immediately.

Aftercare and Monitoring

  • Ensure all kittens are nursing within an hour of birth
  • Count the number of placentas (one per kitten)
  • Monitor the mother for signs of distress or infection
  • Keep the area clean and warm (26–28°C)

How Often Can a Cat Get Pregnant?

Female cats can go into heat as early as 4 months of age and may cycle every 2–3 weeks during breeding season. Cats can get pregnant again while still nursing a previous litter. This is why spaying is recommended unless you are a responsible breeder.

Spaying After Pregnancy

Spaying can typically be done once the kittens are weaned (around 6–8 weeks). Spaying not only prevents future litters but reduces the risk of uterine infections and certain cancers.

Frequently Asked Questions

What is the average litter size for a cat?

Most cats give birth to 3–6 kittens per litter, though first-time mothers often have fewer. Larger litters are more common in certain breeds like Siamese or Oriental Shorthairs.

Can a cat have multiple fathers in one litter?

Yes. Cats can mate with multiple males during heat, resulting in a litter with mixed paternity — called superfecundation.

Is it safe for my cat to give birth at home?

Yes, as long as she’s healthy and monitored. Most cats handle birth without complications. If you're unsure, consult a vet and create a safe environment.

Can I touch the kittens after birth?

Limit handling in the first few days unless necessary. The mother may be protective. Once she’s settled, gentle handling is okay and helps socialization.

When should I call the vet?

  • If labor lasts over 24 hours without kittens
  • If more than 2 hours pass between kittens
  • If kittens are stillborn or weak
  • If the mother stops eating or develops fever

Conclusion

Our Cat Due Date Calculator is a simple yet valuable tool for anticipating your cat’s labor. Knowing the approximate delivery window helps you prepare, reduces stress, and ensures a safe and supportive environment for mother and kittens alike. Be sure to consult with your veterinarian throughout the process to ensure the healthiest outcome possible.