Dog Pregnancy Due Date Calculator

Dog Pregnancy (Due Date) Calculator

Estimate whelping from mating date or veterinary timing (LH peak, ovulation, diestrus). See due date, window, days remaining, weekday, and a step-by-step derivation.

Mode & Timing

Mode

Mating date(s)

Add all breedings for a realistic window (earliest = min +58d, latest = max +68d). No defaults selected.

Pre-Whelping Planner

Confirm timing method (mating, LH peak, ovulation, diestrus) and record dates.
Prepare a whelping box, clean towels/puppy pads, and a scale for pups.
Keep a thermometer; a temperature drop can precede labor.
Have vet contact and transport plan ready.
Stock glucose (for dam), iodine and floss for cords (if advised by your vet).
Set up a warm, quiet, draft-free area with good lighting.

Use the calculator at the left to see the estimated due date and whelping window.

Estimated Due Date (EDD)

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Shows date + weekday.

Whelping Window

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Mating mode: earliest = +58d, latest = +68d. Vet modes show a practical ±5–7 day range.

Days Remaining

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Shows “Overdue by N days” if past due; “Today” if due now.

Gestational Day Today (mating mode)

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Based on first mating date and today. Shows “Starts in N days” if before first mating.

Step-by-step derivation

Select a mode and enter date(s)…

Notes

Typical canine gestation averages about 63 days; practical range ~58–68 days.
Common clinical timing: EDD ≈ LH peak +65d; Ovulation +63d; Diestrus day 1 +58d.
This tool supports planning and education only—consult your veterinarian for clinical decisions.