Dog Pregnancy Calculator
Enter the day your dog mated to get her due date, her current week, and every key vet date in between.
DogChart Calculator
Dog Due Date Calculator
A dog carries her litter for about 63 days. Enter the mating date for the due window plus the key vet dates.
Pick the date your dog mated to see her due date.
Your timeline
These dates are estimates. Gestation is counted from ovulation, not always the mating day, so confirm with your vet. Flat-faced breeds can run a little longer.
How the calculator works
A dog is pregnant for about 63 days. The tool counts forward from the day she mated and lands on day 63 for the average due date. It also shows the wider window, day 58 to day 68, because real litters rarely arrive on the exact day you predict.
Enter the date and you also see her current week and what is happening inside her right now. The timeline marks the vet visits worth booking, so you are not guessing when to call.
Start from the mating date
Use the day your dog tied with the male. If she mated more than once, use the last date. That keeps your window on the safe side, since fertilization can happen a few days after the act itself.
Did not see the mating? You are not stuck. A vet can date the pregnancy with an ultrasound around day 28 to 30. After day 55 an x-ray shows the puppy skeletons and gives a firm count.
Why the fertile date matters more than the mating date
Here is the part most charts skip. Pregnancy is timed from ovulation, not from sex. A female can stand for a male before and after she ovulates, and sperm can live inside her for up to a week. So two dogs bred on the same day can whelp days apart.
If you want a tight date, ask your vet for a progesterone test during the heat. It pins ovulation within a day or two. Most pet owners do fine with the 63-day estimate. Serious breeders test.
What each date on the timeline means
- Day 25-35Ultrasound to confirm the pregnancy and check for heartbeats.
- Week 5Switch her to a quality puppy food for the extra protein and calcium.
- From day 55An x-ray can count the puppies so you know when whelping is done.
- Week 9Take her temperature twice a day. A drop to 98-99°F means labor is near.
- Day 63The average whelping day.
Dog gestation at a glance
| Detail | Value |
|---|---|
| Pregnancy length | 63 days (range 58 to 68) |
| Counted from | Mating date (really ovulation) |
| Confirm by ultrasound | Day 25 to 35 |
| Count puppies by x-ray | Day 55 onward |
| Temperature drop before labor | 98 to 99°F, within 24 hours |
| Switch to puppy food | Around week 5 |
Early signs your dog is pregnant
The first two weeks show nothing. Her body is busy, but you will not see it. Around week 3 some dogs go off their food or seem a little queasy, like mild morning sickness.
Week 4 brings the first real clue for most owners. The nipples grow and turn a deeper pink. By week 5 the belly starts to round. Weight gain, a calmer mood, and nesting come later. None of these confirm a pregnancy on their own. A false pregnancy can copy every one of them, so book the ultrasound before you build the whelping box.
Feeding and care while she is pregnant
Do not bump up her food in the early weeks. Extra weight before week 5 makes whelping harder, not easier. Feed her normal adult portions through the first month.
Around week 5, switch to a quality puppy food. It carries more protein and calcium, which she needs as the puppies grow fast. In the last two weeks she may eat smaller meals more often, since the puppies crowd her stomach. Our dog food chart has portion guides by weight.
Keep exercise gentle. Short walks are fine. Skip rough play, and ask your vet before any flea, worm, or joint medication.
Getting the whelping area ready
Set up a whelping box about a week before the due date. She needs a quiet corner where she feels safe, away from foot traffic. Line it with bedding you do not mind losing, because birth is messy.
Start taking her temperature twice a day in week 9. Normal sits near 101.5°F. When it drops to 98 or 99°F, labor is usually less than 24 hours away. That single number is the best warning you get.
How accurate is the due date?
The 63-day average works for most dogs, big or small. Nearly every litter lands between day 58 and day 68. Size barely shifts it, so a Chihuahua and a Great Dane run about the same clock. The dog size chart shows how breeds compare.
I have had one litter show up on day 59 and another hold out to day 67, both from dogs I bred myself. The window is real, so do not panic on day 60. Flat-faced breeds are the exception worth watching. French Bulldogs and English Bulldogs often go a day or two over and have more trouble whelping, and many need a planned c-section. Line up your vet early if you have one.
Litter size by breed
Litter size tracks body size more than anything. Smaller dogs carry fewer puppies because they have less room. A first litter usually runs smaller than later ones.
| Breed size | Typical litter |
|---|---|
| Toy (under 10 lb) | 1 to 3 puppies |
| Small (10 to 25 lb) | 2 to 5 puppies |
| Medium (25 to 50 lb) | 4 to 7 puppies |
| Large (50 to 90 lb) | 6 to 10 puppies |
| Giant (90 lb and up) | 7 to 12 puppies |
The only way to know the real count is an x-ray in week 9. It tells you when the last puppy is out.
If the due date comes and goes
A day or two past day 63 is normal. Keep watching her temperature. If she reaches day 68 with no labor, call your vet that day. Going long can mean the dates were off, or it can point to a problem that needs a check.
Frequently asked questions
How long is a dog pregnant?
A dog is pregnant for about 63 days, or roughly two months. The normal range is 58 to 68 days from mating, and small and large breeds carry for about the same length of time.
How accurate is a dog due date calculator?
It is accurate within a few days for most dogs. The 63-day average is reliable, but the exact day depends on when the egg was fertilized. A progesterone test at the vet gives the most precise ovulation date.
Can I find the due date without the mating date?
Not exactly. If you did not see the mating, a vet can estimate the due date from ultrasound measurements around day 28 to 30, or from an x-ray once the puppy skeletons show after day 55.
How many puppies will my dog have?
Litter size depends on the breed and the dam. Toy breeds often have 1 to 3 puppies, while large and giant breeds can have 8 or more. An x-ray from day 55 gives an accurate count.
When does a pregnant dog start showing?
Most dogs start to look pregnant around week 5 or 6, when the belly rounds and the nipples enlarge. Slim or first-time mothers may show a little later.
Can I feel the puppies before they are born?
You may feel movement late, from about week 7, as the puppies shift. Early on, the fluid around them makes them hard to feel. A vet can feel for them by gently pressing the belly around day 28 to 30.
Does the breed change the due date?
For most breeds, no. The 63-day average applies across sizes. Flat-faced breeds such as French Bulldogs can run a day or two longer and have a higher chance of whelping trouble.
When should I call the vet?
Call if your dog passes day 68 without labor, strains hard for more than 30 minutes without a puppy, or rests more than 2 hours between puppies while still pregnant. Dark green discharge before the first puppy is another reason to call.
Keep reading
Dog pregnancy chart: full week-by-week guide Dog temperature chart Dog heat cycle chartThis tool gives estimates for planning only and does not replace veterinary care. Figures follow AKC and general veterinary guidance. Always confirm your dog's pregnancy and due date with your vet.