How accurate is this calculator?
Based on the standard 63-day gestation period, accuracy is ±2 days. Always confirm with your vet.
Small breed vs large breed?
Small breeds (like Chihuahuas) may deliver 1-2 days earlier. Large breeds can go 64-65 days.
When to visit the vet?
Schedule first check-up at week 3-4 for ultrasound confirmation.
Week by week pictures?
Our emoji guide shows key milestones. Actual ultrasounds reveal details from week 4.