Dog Pregnancy Calculator
Enter the day your dog was mated and get her estimated due date, the full whelping window, the week she is in right now, and a dated week-by-week chart for the whole pregnancy. Free, no signup.
Calculate her due date
View day by day — all 68 days with milestone flags
Everything is calculated in your browser. The dates you enter are never sent anywhere — no signup, no account, nothing stored.
How long are dogs pregnant?
About 63 days from ovulation — roughly nine weeks, or two months. Counted from the mating date instead, a normal pregnancy lands anywhere from day 58 to day 68, which is why this calculator gives you a window as well as a due date.
The 63-day figure itself barely varies. What moves is the starting point: mating and fertilization are not the same event. Sperm can survive inside the female for several days, and a dog's eggs need about two days after ovulation to mature before they can be fertilized. So a mating on Monday might not become a pregnancy until later that week — and the whelping date shifts with it.
One myth to clear up: breed and size do not change how long a dog is pregnant. A Chihuahua and a Great Dane both carry for about 63 days from ovulation. Breed changes the litter size, the care she needs, and how closely whelping should be watched — not the calendar. If another calculator moves your due date because you picked a breed, it is decorating the answer, not improving it.
Some numbers to anchor on: a typical first litter is about 5–6 puppies; large dogs may have 8–12, small dogs often just 1–4. Only an X-ray from day 45 gives a reliable count for your dog. Read more in our guide to how long dogs are pregnant.
Worked example: a mating on August 14
Say your dog was first mated on Friday, August 14, 2026. Here is exactly what the calculator does with that date:
Step 1 — Add 63 days for the due date. August 14 + 63 days = Friday, October 16, 2026. That is the single most likely whelping day.
Step 2 — Build the window. Day 58 = Sunday, October 11, 2026. Day 68 = Wednesday, October 21, 2026. Plan to be home and ready from October 11 onward; most litters arrive close to the middle of the window.
Step 3 — Read her current status. If today were September 13, 2026, she would be 30 days pregnant — week 5 of 9 — with 33 days to go. Week 5 is when toes, claws and whisker buds form and her belly starts to round: the week the pregnancy becomes visible.
Step 4 — Put the vet dates on your calendar. Ultrasound to confirm: around September 8–13 (days 25–30). X-ray to count puppies: from September 28 (day 45). Temperature checks twice a day from October 9 (day 56).
Dog pregnancy week by week
Day 1 below is the day after mating; day 63 is the due date. Enter your mating date above and this same chart comes back with your dog's real calendar dates.
| Week | Days | What is happening | What to do |
|---|---|---|---|
| Week 1 | 1–7 | Fertilization. Eggs mature, are fertilized, and the embryos divide as they travel toward the uterus. No outward signs at all. | Note the mating date somewhere safe. Keep food and exercise normal. |
| Week 2 | 8–14 | Embryos reach the uterus and begin settling into the lining (implantation). Hormones are changing; she may eat a little less for a few days. | Nothing to change yet. Avoid starting new medications without telling your vet she may be pregnant. |
| Week 3 | 15–21 | Implantation completes, the placenta forms, and organs begin to develop. The pregnancy hormone relaxin starts to rise — a blood test can pick it up from about day 21. Some dogs have a few off-food, “morning sickness” days. | Book her confirmation visit for next week. Keep routines calm and normal. |
| Week 4 | 22–28 | Eyes and spinal cord are forming. Heartbeats can be seen on ultrasound from about day 25, and a vet may be able to feel the embryos by palpation from about day 28. | Ultrasound week — the most reliable early confirmation. Ask your vet about feeding and deworming from here on. |
| Week 5 | 29–35 | Toes, claws and whisker buds form; the fetuses are now recognizably puppies, and sex can be seen on ultrasound. Her belly starts to round and her nipples become more prominent. | Begin switching her gradually onto a high-quality puppy or performance food. Offer smaller meals more often. |
| Week 6 | 36–42 | The puppies' skeletons begin to calcify (mineralize) toward the end of this week, and coat color and markings develop. She is visibly pregnant now and her appetite climbs. | Keep exercise gentle — walks yes, rough play and jumping no. Start gathering whelping supplies. |
| Week 7 | 43–49 | Rapid growth: the puppies gain most of their remaining weight in weeks 7–9. An X-ray from day 45 can count them accurately now that skeletons show. Mammary glands develop. | Get the puppy-count X-ray. Set up the whelping box in a quiet corner and let her get used to sleeping in it. |
| Week 8 | 50–56 | You may see or feel the puppies moving. Nesting starts — digging, rearranging bedding, looking for a den. Milk may be present in the final days of the week. | From day 56, take her rectal temperature morning and evening and write it down. Finish your supplies and keep her close to home. |
| Week 9 | 57–63 | Final preparation. Her temperature will drop by about 1–2 °F — typically below 99 °F (37.2 °C) — roughly 12–24 hours before labor starts. Restlessness, nesting and loss of appetite follow. | Stay within reach. Due date is day 63; the normal window runs to day 68. If she passes day 68, or you see the warning signs below, call your vet. |
The full dated version of this chart — with care tasks for every week — is on our canine pregnancy calendar page and in the week-by-week guide, which also has a free printable week-by-week chart (PDF) you can put on the fridge.
All nine weeks on one page, with the whelping preparation checklist and space to write in your own vet dates. Print it and put it on the fridge.
Download the free PDF chartSigns of dog pregnancy
Signs arrive in stages, and none of them — on their own — prove a pregnancy. A false pregnancy can produce almost all of them, which is why the confirmation table in the next section matters. The full stage-by-stage guide is our signs of dog pregnancy post.
Early signs (weeks 1–4): a few days of reduced appetite or mild vomiting around week 3; tiredness — sleeping more, less interest in play; behavior changes in either direction (more affectionate and clingy, or a bit irritable); nipples becoming slightly larger and pinker (“pinking up”) toward week 4. Blood work at this stage may also show mild anemia and an elevated white blood cell count — one more reason the confirmation visit is worthwhile.
Mid-pregnancy signs (weeks 5–6): clear weight gain and a rounding belly; appetite not just back but increased; nipples larger and darker; a small amount of clear, odorless discharge can be normal.
Late signs (weeks 7–9): an obviously enlarged abdomen; puppies visibly moving or felt through the belly wall; mammary glands swelling, with milk possible in the last days; nesting behavior — digging at bedding, choosing a quiet spot, carrying toys there; restlessness and a drop in appetite in the final 24–48 hours.
How a vet confirms the pregnancy
A calculator works out dates. Only an examination confirms puppies. The four standard methods:
| Method | Earliest timing | What it tells you |
|---|---|---|
| Relaxin blood test | About day 21–28 | Pregnant or not. Relaxin is made only by the placenta, so a positive result also rules out a false pregnancy. No litter size. |
| Ultrasound | From about day 25 | Confirms pregnancy and live heartbeats; the best early check. Unreliable for counting puppies. |
| Palpation | About days 28–35 | A vet feels the embryo swellings by hand. Quick and inexpensive; accuracy depends on timing, size and temperament. |
| X-ray | From about day 45 | The reliable puppy count, once the skeletons have calcified. Used to plan whelping and to know when delivery is complete. |
There is no reliable home pregnancy test for dogs — dogs do not produce hCG, the hormone human tests detect, and relaxin cannot be measured dependably in urine. Anyone selling a home test kit for dogs is selling you a guess. Our guide to how to tell if your dog is pregnant compares the four methods in full.
Getting ready for whelping
Set up the whelping box 1–2 weeks before the due date — a quiet, warm, draft-free corner where she can come and go but puppies cannot wander. Let her sleep in it ahead of time so it smells like hers by the big day. The complete, dated version is our whelping preparation checklist.
Have these ready by day 58:
- Clean towels and blankets (several changes — whelping is messy)
- A heating pad or heat lamp for the puppies (they cannot regulate their own temperature)
- Sterile gloves and sterilized scissors
- Dental floss or clamps for umbilical cords, plus iodine for the stumps
- A bulb syringe for clearing mouths and noses
- A small scale and a notebook — weigh each puppy at birth and daily after
- Puppy milk replacer (formula) and a bottle, in case a puppy needs help or the litter is large
- Your vet's number and the nearest emergency vet's number, written down, not just in your phone
In the final week, take her temperature twice a day at the same times. A sustained drop below about 99 °F is the most dependable sign that labor will start within 12–24 hours — when you see it, clear your schedule. More in our guide to the temperature drop before whelping and the signs of dog labor.
Call your vet promptly if:
She reaches day 68 with no labor · she strains hard for 30–60 minutes with no puppy · more than about 2 hours pass between puppies while she is straining · you see dark green or black discharge before any puppy has arrived · there is heavy bleeding, collapse, or she seems in severe pain or distress. This list is a safety net, not a diagnosis — when in doubt, call. The full guide: when to call the vet during dog pregnancy.
Frequently asked questions
How long are dogs pregnant?
About 63 days from ovulation — roughly nine weeks. Counted from the mating date, most dogs give birth between day 58 and day 68, because mating and fertilization rarely happen on the same day. The length is about the same for every breed and size, from the smallest toy breed to a Great Dane.
How do I calculate my dog's pregnancy and due date?
Write down the first mating date and add 63 days — that is the estimated due date. Then add 58 and 68 days to the same date for the earliest and latest likely whelping dates. Count the days from the mating date to today and you have how far along she is, and which week she is in. The calculator at the top of this page does all of it and turns the whole pregnancy into a dated chart.
How accurate is this calculator?
It is as accurate as the mating date you give it. The 63-day average is one of the most consistent numbers in dog breeding, but because fertilization can lag mating by several days, real deliveries spread across the 58–68 day window. A vet who timed ovulation with progesterone testing can narrow the window further — mating dates alone cannot.
My dog was mated more than once. Which date do I use?
Use the first mating date as the main date — it anchors the earliest realistic window. If the matings spread over several days, add the last mating date in the optional field: the calculator keeps the due date from the first mating and extends the latest window date to 68 days after the last one, so you are covered at both ends.
Can this calculator tell me if my dog is really pregnant?
No — and no calculator can. It does date arithmetic only; it cannot distinguish a true pregnancy from a false pregnancy, which can mimic the same signs for weeks. Confirmation needs a vet: a relaxin blood test from about day 21–28, or an ultrasound from about day 25, which also checks for heartbeats.
When can a vet confirm a dog's pregnancy?
Earliest is the relaxin blood test, reliable from about day 21–28 after mating. An ultrasound from about day 25 can confirm pregnancy and viability. Palpation works around days 28–35. For a puppy count, wait for an X-ray from day 45, once the skeletons have calcified enough to show. Most owners do the ultrasound first and the X-ray in week 7.
Does breed or size change the due date?
No. Gestation from ovulation is about 63 days in every breed — that is settled veterinary science, and it is why this calculator never asks for a breed to compute dates. Breed absolutely changes other things: expected litter size (about 1–4 puppies in small dogs, 8–12 in large ones), whelping risks, and how much supervision she needs. Just not the calendar.
What is whelping?
Whelping is the word for a dog giving birth — labor, the delivery of each puppy, and the delivery of the placentas afterward. Our dog whelping date calculator is the same engine as this page with a breeder's view: whelp date, window, and a preparation countdown. If you see “whelp date” on pedigrees and registration papers, it simply means the litter's date of birth.
What are the first signs that labor is starting?
The most reliable early sign is the temperature drop: about 1–2 °F, usually below 99 °F, roughly 12–24 hours before labor. Then come the stage 1 signs — restlessness, nesting and digging, loss of appetite, panting, shivering, and wanting to stay close to you (or, in some dogs, to be left alone). Stage 1 usually lasts 6–12 hours before active straining begins.
How many months is a dog pregnant for?
About two months. The full pregnancy runs roughly nine weeks — 63 days from ovulation — which is why dog pregnancies feel so fast next to the nine months of a human pregnancy. Counted from the mating date, expect the birth somewhere in weeks 9 to 10 (days 58–68). There is no long third trimester to plan around; the whole thing is over in about 60 days.
Are dogs pregnant for exactly 9 weeks?
Not exactly — nine weeks (63 days) is the average measured from ovulation, and it is a very consistent average. But owners count from the mating date, and fertilization can happen days after mating, so real pregnancies end anywhere from day 58 to day 68. Think “about 9 weeks, give or take a few days either side,” and use the window, not just the single date.
Is this dog pregnancy calculator free?
Yes — completely free, with no signup, no account and no limits. The due date, the window, the current-week reading, the progress timeline and the printable chart are all included, and your dates never leave your browser. If the site helps you, the only thing we ask is that you still confirm the pregnancy with your vet — no website can do that part for you.
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