About Us
Dog Due Date Calculator is a small, independent website with one focus: helping dog owners and small breeders understand heat cycles, pregnancy and whelping.
What we do
We build simple, free calculators that work on any phone or computer with no sign-up. Each one comes with a plain-English guide explaining how the estimate is worked out and what its limits are.
How we write our content
- We base our guides on recognized veterinary references, such as the Merck Veterinary Manual and vet-reviewed pet health resources, and list our sources on each page.
- We show estimates as ranges, not guarantees, because every dog is different.
- We tell you when to call a vet. Our tools never replace an exam, a pregnancy test or progesterone testing.
- We review and update pages when guidance changes.
Responsible breeding
We support responsible, health-focused breeding. That means health testing, working closely with a veterinarian, and planning for every puppy’s future home.
Contact us
Spotted a mistake or have a suggestion? Get in touch. We read every message.