Dog & Cat Pregnancy Due Date Calculator
Enter the mating date to calculate the expected whelping date and all key pregnancy milestones for dogs and cats.
If mating occurred on multiple days, use the first date for the earliest estimate.
Expected Due Date
11 July 2026
In 52 days
Overdue if not by 16 July 2026
Important note
These dates are estimates. Actual whelping can vary by ±3–5 days. Always work with a veterinarian throughout the pregnancy for health monitoring and emergency preparation.
Pregnancy Timeline
Mating / Conception
Done9 May 2026 · Day 0
Day 1 of gestation. Fertilisation occurs within 24–48 hours of mating.
Heartbeats detectable
31 May 2026 · Day 22
Ultrasound can detect fetal heartbeats from around day 22–25.
First vet check
6 June 2026 · Day 28
Ultrasound confirms pregnancy and estimates litter size (days 28–35).
X-ray possible
23 June 2026 · Day 45
Puppy skeletons are now visible on X-ray for accurate count.
Set up whelping box
3 July 2026 · Day 55
Prepare a quiet, warm whelping box. Introduce the mother so she adjusts.
Start temperature checks
6 July 2026 · Day 58
Take rectal temperature twice daily. A drop below 37.8 °C (100 °F) signals labour within 24 hours.
Labour window opens
8 July 2026 · Day 60
Normal delivery range begins. Have your vet's emergency number ready.
Expected whelping date
11 July 2026 · Day 63
63 days is the average. Healthy range is 58–68 days from mating.
Overdue — call your vet
16 July 2026 · Day 68
If no labour by day 68, contact your vet immediately.
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