Cat Pregnancy Calculator

Your details

Use the date of first observed mating. If you saw mating on multiple days, use the first date for the earliest possible due date.
Most cats deliver at 63-65 days. Use 63 for a first estimate.
Estimated due datePregnancy on track
Dec 19, 2026

Expected delivery date based on mating date plus chosen gestation length

Earliest possible birthDec 14, 2026
Latest safe birthDec 28, 2026
Days until due date49
Current pregnancy weekWeek 3 of 9
Nipple changes expectedNov 1, 2026
Earliest ultrasound dateNov 11, 2026
Nesting behavior expectedDec 12, 2026
Temperature drop expectedDec 16, 2026
  • Mating
  • Nipples pink
  • Ultrasound
  • Belly shows
  • X-ray count
  • Nesting
  • Due date (avg)
  • Latest safe birth

Due date: Dec 19, 2026 (49 days to go)

  • Expected due date: Dec 19, 2026. Safe birth window: Dec 14, 2026 to Dec 28, 2026.
  • At Week 3 of 9, focus on nutrition: switch to a high-quality kitten food now if you have not already, as it provides the extra calories and calcium your queen needs.
  • First-time nipple changes (pinking and swelling) typically appear around day 15-18, often the first visible sign of pregnancy.
  • A veterinary ultrasound from day 25 onward can confirm pregnancy and count kittens. An x-ray after day 45 gives the most accurate kitten count.

Next stepKeep your vet informed at each stage, especially if labor lasts more than 30 minutes between kittens or your cat shows signs of distress.

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