Dog Pregnancy Calculator

March 2024
A dog that bred on 5 Mar 2024 has an approximate due date of

Tuesday, May 7, 2024

The due date could fall between 2 May and 12 May. Learn more about the Key Gestation Milestones.

Disclaimer: We've spent hundreds of hours building and testing our calculators and conversion tools. However, we cannot be held liable for any damages or losses (monetary or otherwise) arising out of or in connection with their use. Full disclaimer.

Dog Gestation Milestones

Here's a list of key milestones in dog pregnancy, broken down by stages:

  1. Fertilization and Early Pregnancy (Weeks 1-2 Starting 5 Mar)
    • Mating and Fertilization: Successful mating leads to fertilization.
    • Embryo Formation: Fertilized eggs form embryos and travel to the uterus.
  2. Embryo Implantation (Week 3 Starting 20 Mar)
    • Implantation: Embryos implant in the uterine lining.
    • Early Signs of Pregnancy: Slight behavioral changes might be noticeable.
  3. Fetal Development (Week 4 Starting 27 Mar)
    • Veterinary Confirmation: A vet can confirm pregnancy through palpation or ultrasound.
    • Visible Physical Changes: Enlargement and darkening of nipples; slight abdominal enlargement.
  4. Rapid Growth Period (Weeks 5-6 Starting 27 Mar)
    • Ultrasound Viability: Heartbeats are detectable via ultrasound.
    • Significant Physical Changes: Noticeable increase in the mother's abdominal size; increased appetite.
  5. Preparation for Birth (Week 7 Starting 17 Apr)
    • Fetal Development Completion: Puppies develop most features by now.
    • Nesting Behavior: The mother may start looking for a place to give birth.
  6. Pre-Labor Stage (Week 8 Starting 24 Apr)
    • X-ray Viability: An X-ray can show the number of puppies.
    • Physical Readiness: The mother's body prepares for labor; she may show signs of discomfort.
  7. Final Week and Labor (Week 9 Starting 8 May)
    • Labor Signs: Restlessness, nesting, loss of appetite, temperature drop.
    • Labor and Delivery: The onset of labor leading to the birth of puppies.
  8. Post-Birth (7 May+)
    • Immediate Postpartum: Ensuring all puppies are nursing and the mother is caring for them.
    • Veterinary Check-up: Post-birth check-up for mother and puppies.
Additional Milestones
  • Health Monitoring: Regular health check-ups throughout pregnancy.
  • Diet and Nutrition Adjustment: Increased and adjusted feeding as the pregnancy progresses.
  • Whelping Box Preparation: Setting up a comfortable birthing area before the due date.

How Do You Calculate a Dog's Due Date?

3 puppies sitting on the grass on a sunny day looking at the camera

Calculating a dog's due date primarily revolves around the date of mating since the exact moment of ovulation can be difficult to determine. Here's a simple step-by-step process to calculate a dog's due date:

  1. Determine the Date of Mating: Record the date(s) when the dog was bred. If there were multiple matings, note all the dates.
  2. Understand the Average Gestation Period: The average gestation period for a dog is about 63 days (or approximately 9 weeks), but it can range between 58 and 68 days.
  3. Use the First Mating Date as a Starting Point: If you know only one mating date, use this date. If there are multiple mating dates, you can either use the first date or an average of the dates for a rough estimate. Using the first mating date is commonly advised for simplicity.
  4. Add 63 Days to the Mating Date: Count 63 days forward from the mating date to estimate the due date.
  5. Consider the Range: Keep in mind the normal variation in gestation length (58 to 68 days). This means the dog could deliver a few days before or after the calculated due date.
  6. Monitor for Signs of Approaching Labor: As the estimated due date approaches, look for signs of labor like nesting behavior, restlessness, or loss of appetite.

Pregnancy Durations For Different Dog Breeds

Tabulating the pregnancy duration for different dog breeds isn't meaningful because the gestation period for dogs is generally consistent across breeds. However, there can be slight variations based on size and breed characteristics. The average gestation period for all dogs is about 63 days (or 9 weeks), but it can range from 58 to 68 days.

A table showing canine gestation length by size is better because size is a more relevant factor than breed in determining slight variations in gestation length:

Dog Size CategoryAverage Gestation DurationPossible Range
Small Breeds63 days58-66 days
Medium Breeds63 days59-67 days
Large Breeds63 days60-68 days
Giant Breeds63 days61-69 days


  1. Small Breeds: Includes breeds like Chihuahuas, Pomeranians, and Dachshunds.
  2. Medium Breeds: Includes breeds like Beagles, Bulldogs, and Cocker Spaniels.
  3. Large Breeds: Includes breeds like Labradors, Golden Retrievers, and German Shepherds.
  4. Giant Breeds: Includes breeds like Great Danes, Mastiffs, and Saint Bernards.

Dog Pregnancy Reference Table

Below is a reference table showing the due date for all days of the year.

Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date Date BredDue Date
1 Jan4 Mar1 Feb4 Apr1 Mar3 May1 Apr3 Jun1 May3 Jul1 Jun3 Aug1 Jul2 Sep1 Aug3 Oct1 Sep3 Nov1 Oct3 Dec1 Nov3 Jan1 Dec2 Feb
2 Jan5 Mar2 Feb5 Apr2 Mar4 May2 Apr4 Jun2 May4 Jul2 Jun4 Aug2 Jul3 Sep2 Aug4 Oct2 Sep4 Nov2 Oct4 Dec2 Nov4 Jan2 Dec3 Feb
3 Jan6 Mar3 Feb6 Apr3 Mar5 May3 Apr5 Jun3 May5 Jul3 Jun5 Aug3 Jul4 Sep3 Aug5 Oct3 Sep5 Nov3 Oct5 Dec3 Nov5 Jan3 Dec4 Feb
4 Jan7 Mar4 Feb7 Apr4 Mar6 May4 Apr6 Jun4 May6 Jul4 Jun6 Aug4 Jul5 Sep4 Aug6 Oct4 Sep6 Nov4 Oct6 Dec4 Nov6 Jan4 Dec5 Feb
5 Jan8 Mar5 Feb8 Apr5 Mar7 May5 Apr7 Jun5 May7 Jul5 Jun7 Aug5 Jul6 Sep5 Aug7 Oct5 Sep7 Nov5 Oct7 Dec5 Nov7 Jan5 Dec6 Feb
6 Jan9 Mar6 Feb9 Apr6 Mar8 May6 Apr8 Jun6 May8 Jul6 Jun8 Aug6 Jul7 Sep6 Aug8 Oct6 Sep8 Nov6 Oct8 Dec6 Nov8 Jan6 Dec7 Feb
7 Jan10 Mar7 Feb10 Apr7 Mar9 May7 Apr9 Jun7 May9 Jul7 Jun9 Aug7 Jul8 Sep7 Aug9 Oct7 Sep9 Nov7 Oct9 Dec7 Nov9 Jan7 Dec8 Feb
8 Jan11 Mar8 Feb11 Apr8 Mar10 May8 Apr10 Jun8 May10 Jul8 Jun10 Aug8 Jul9 Sep8 Aug10 Oct8 Sep10 Nov8 Oct10 Dec8 Nov10 Jan8 Dec9 Feb
9 Jan12 Mar9 Feb12 Apr9 Mar11 May9 Apr11 Jun9 May11 Jul9 Jun11 Aug9 Jul10 Sep9 Aug11 Oct9 Sep11 Nov9 Oct11 Dec9 Nov11 Jan9 Dec10 Feb
10 Jan13 Mar10 Feb13 Apr10 Mar12 May10 Apr12 Jun10 May12 Jul10 Jun12 Aug10 Jul11 Sep10 Aug12 Oct10 Sep12 Nov10 Oct12 Dec10 Nov12 Jan10 Dec11 Feb
11 Jan14 Mar11 Feb14 Apr11 Mar13 May11 Apr13 Jun11 May13 Jul11 Jun13 Aug11 Jul12 Sep11 Aug13 Oct11 Sep13 Nov11 Oct13 Dec11 Nov13 Jan11 Dec12 Feb
12 Jan15 Mar12 Feb15 Apr12 Mar14 May12 Apr14 Jun12 May14 Jul12 Jun14 Aug12 Jul13 Sep12 Aug14 Oct12 Sep14 Nov12 Oct14 Dec12 Nov14 Jan12 Dec13 Feb
13 Jan16 Mar13 Feb16 Apr13 Mar15 May13 Apr15 Jun13 May15 Jul13 Jun15 Aug13 Jul14 Sep13 Aug15 Oct13 Sep15 Nov13 Oct15 Dec13 Nov15 Jan13 Dec14 Feb
14 Jan17 Mar14 Feb17 Apr14 Mar16 May14 Apr16 Jun14 May16 Jul14 Jun16 Aug14 Jul15 Sep14 Aug16 Oct14 Sep16 Nov14 Oct16 Dec14 Nov16 Jan14 Dec15 Feb
15 Jan18 Mar15 Feb18 Apr15 Mar17 May15 Apr17 Jun15 May17 Jul15 Jun17 Aug15 Jul16 Sep15 Aug17 Oct15 Sep17 Nov15 Oct17 Dec15 Nov17 Jan15 Dec16 Feb
16 Jan19 Mar16 Feb19 Apr16 Mar18 May16 Apr18 Jun16 May18 Jul16 Jun18 Aug16 Jul17 Sep16 Aug18 Oct16 Sep18 Nov16 Oct18 Dec16 Nov18 Jan16 Dec17 Feb
17 Jan20 Mar17 Feb20 Apr17 Mar19 May17 Apr19 Jun17 May19 Jul17 Jun19 Aug17 Jul18 Sep17 Aug19 Oct17 Sep19 Nov17 Oct19 Dec17 Nov19 Jan17 Dec18 Feb
18 Jan21 Mar18 Feb21 Apr18 Mar20 May18 Apr20 Jun18 May20 Jul18 Jun20 Aug18 Jul19 Sep18 Aug20 Oct18 Sep20 Nov18 Oct20 Dec18 Nov20 Jan18 Dec19 Feb
19 Jan22 Mar19 Feb22 Apr19 Mar21 May19 Apr21 Jun19 May21 Jul19 Jun21 Aug19 Jul20 Sep19 Aug21 Oct19 Sep21 Nov19 Oct21 Dec19 Nov21 Jan19 Dec20 Feb
20 Jan23 Mar20 Feb23 Apr20 Mar22 May20 Apr22 Jun20 May22 Jul20 Jun22 Aug20 Jul21 Sep20 Aug22 Oct20 Sep22 Nov20 Oct22 Dec20 Nov22 Jan20 Dec21 Feb
21 Jan24 Mar21 Feb24 Apr21 Mar23 May21 Apr23 Jun21 May23 Jul21 Jun23 Aug21 Jul22 Sep21 Aug23 Oct21 Sep23 Nov21 Oct23 Dec21 Nov23 Jan21 Dec22 Feb
22 Jan25 Mar22 Feb25 Apr22 Mar24 May22 Apr24 Jun22 May24 Jul22 Jun24 Aug22 Jul23 Sep22 Aug24 Oct22 Sep24 Nov22 Oct24 Dec22 Nov24 Jan22 Dec23 Feb
23 Jan26 Mar23 Feb26 Apr23 Mar25 May23 Apr25 Jun23 May25 Jul23 Jun25 Aug23 Jul24 Sep23 Aug25 Oct23 Sep25 Nov23 Oct25 Dec23 Nov25 Jan23 Dec24 Feb
24 Jan27 Mar24 Feb27 Apr24 Mar26 May24 Apr26 Jun24 May26 Jul24 Jun26 Aug24 Jul25 Sep24 Aug26 Oct24 Sep26 Nov24 Oct26 Dec24 Nov26 Jan24 Dec25 Feb
25 Jan28 Mar25 Feb28 Apr25 Mar27 May25 Apr27 Jun25 May27 Jul25 Jun27 Aug25 Jul26 Sep25 Aug27 Oct25 Sep27 Nov25 Oct27 Dec25 Nov27 Jan25 Dec26 Feb
26 Jan29 Mar26 Feb29 Apr26 Mar28 May26 Apr28 Jun26 May28 Jul26 Jun28 Aug26 Jul27 Sep26 Aug28 Oct26 Sep28 Nov26 Oct28 Dec26 Nov28 Jan26 Dec27 Feb
27 Jan30 Mar27 Feb30 Apr27 Mar29 May27 Apr29 Jun27 May29 Jul27 Jun29 Aug27 Jul28 Sep27 Aug29 Oct27 Sep29 Nov27 Oct29 Dec27 Nov29 Jan27 Dec28 Feb
28 Jan31 Mar28 Feb1 May28 Mar30 May28 Apr30 Jun28 May30 Jul28 Jun30 Aug28 Jul29 Sep28 Aug30 Oct28 Sep30 Nov28 Oct30 Dec28 Nov30 Jan28 Dec1 Mar
29 Jan1 Apr29 Mar31 May29 Apr1 Jul29 May31 Jul29 Jun31 Aug29 Jul30 Sep29 Aug31 Oct29 Sep1 Dec29 Oct31 Dec29 Nov31 Jan29 Dec2 Mar
30 Jan2 Apr30 Mar1 Jun30 Apr2 Jul30 May1 Aug30 Jun1 Sep30 Jul1 Oct30 Aug1 Nov30 Sep2 Dec30 Oct1 Jan30 Nov1 Feb30 Dec3 Mar
31 Jan3 Apr31 Mar2 Jun31 May2 Aug31 Jul2 Oct31 Aug2 Nov31 Oct2 Jan31 Dec4 Mar