Dog Due Date Calculator
Calculate your dog's whelping due date from mating date, confirmed ovulation, or LH surge.
What Is the Dog Due Date Calculator?
Calculate your dog's whelping due date from mating date, confirmed ovulation, or LH surge.
Three calculation methods — from mating date, confirmed ovulation, or LH surge. The more precise your input, the more accurate the due date.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Adding 63 days to confirmed ovulation is accurate within 1-2 days. From mating date alone the window is 58-68 days. The LH surge occurs 24-48 hours before ovulation so adding 65 days gives a similar result to ovulation-based calculation.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- Merck Veterinary Manual u2014 Reproduction — Canine reproductive physiology, oestrous cycle and gestation
- AVMA u2014 Canine Reproduction — Breeding, pregnancy and whelping reference
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.