Animal Pregnancy Due Date

Summary

This calculator estimates the expected birth date for eight common domestic species using standard veterinary gestation periods. Enter the breeding or last mating date, select the species, and the tool returns the due date along with key pregnancy milestones — such as the optimal window for ultrasound confirmation and when to prepare for birth. All calculations run in your browser; no data is sent to any server.

How it works

1. Select the animal species from the dropdown.
2. Enter the date of breeding or last mating in the date field.
3. Click "Calculate Due Date" to see results.
4. Review the estimated due date and gestation length.
5. Check the milestone timeline to track pregnancy progress.
6. Use the result as a guide — consult your veterinarian for confirmation.

Use cases

• Estimate a dog or cat whelping/kittening date for home breeders.
• Plan calving management for beef or dairy cattle operations.
• Schedule foaling watch for horse breeders.
• Prepare farrowing crates and heat lamps ahead of pig birth.
• Track lambing season timing for sheep flocks.
• Coordinate veterinary checks around key gestation milestones.
• Compare expected due dates across multiple breeding events.
• Educate new pet owners about normal pregnancy length.

Frequently Asked Questions