Canine Pregnancy Calculator and Calendar

This canine pregnancy calculator will give you the expected dates of whelping for your mated bitch. Simply enter the date of the first mating and you will be given an estimated date of pregnancy. You’ll also find a detailed calendar of what to expect week-by-week after calculating the due date.

See here for more information on caring for your dog during pregnancy.

Not working? View the canine pregnancy calculator in a separate window

Anna Fotografia / Via Facebook: anapaulagrillophotographer
Anna Fotografia / Via Facebook: anapaulagrillophotographer

If you’d like more information, read our article about the signs and symptoms of canine pregnancy. This article has lots of information about spotting the signs of pregnancy. You might also like our guide on caring for your dog when pregnant.

Consider purchasing a whelping kit if the pups are due soon >>

Please leave any questions about this canine pregnancy calculator and calendar in the comments section below.


  1. This is a very helpful website, many thanks.
    I have bred my colored Boston T. This is her 1st litter and my 1st Boston. I have bred other breeds but her being my 1st BT and it being her 1st litter is exciting and a little scary at the same time. Thanks for all the good information, it’s very much appreciated.

  2. What’s the longest a chihuahua can be pregnant for? My chihuahua had many breed dates in February and stopped bleeding on Feb 21st but still got tied after the 21st till the 26th of February.

    • Hello! My dog’s due date was between the 18th-20th and she’s showing no signs of labor. After reading your post, I was wondering how it went for you? Thank you!

      • There’s no specific science to the when your dog will go into labor..The bitch will usually give you signs like Heaving breathing,vaginadischarge,digging and pacing etc..Just be watchful..

  3. My day is on day 64 from the first mating, she is showing no signs of being ready to deliver. What is the date I should start to worry?


  4. Hi its been 7 days since our three year collie was mated could she be showing signs yet as she’s is staying very close to my wife more then before also when take her out walking she always loves her walk and me throwing her ball now I throw her ball once and then she runs back to the car where my wife is but wife throws ball for her and she’s OK .this is something she’s never done before also she seems to be very different she’s very loving we know its early but could the above be signs that she’s pregnant

  5. I think my dog is pregnant I am starting to look at different weeping ideas and think a large dog crate is a good idea she is a bichon, just need a bit of advice I also have 2 other dogs who all get on great will this be the case when the pups arrive or do I did to separate the weeping box away from them many thanks

    • Mom and pups need quiet place with no other animals. Helps to set up whelping room a week ahead of time make sure all your whelping supplies are handy. My sweet beagles girls become ferocious mommies once the pups arrive the less stress the better. You need to be able to get to all sides of your girl when she is whelping incase she or a puppy need help. Check out several internet sites on whelping to help you get a list of supplies and whelping room ideas. Start saving $$$ for possible emergency vet care, puppy check ups etc.

    • I found when my jack Russell had her first litter she got very protective of her pups, normally with my other two dogs she gets along great with them but once the pups arrived they couldn’t even step into the same room as her and her babies. Good luck with mum and puppies hope all goes well

  6. She ended up giving birth on April 25th and they said its not in natural for them to go a few days over due date.

  7. My 5 yrs old boxer and my 1 yr old boxer bread on july 19,21,23. Then she would not let him touch her no more after that. She sleeps alot and dont eat but once a day of which there is always food in her bowl .She will not play with him and seems to be very cautious with herself. she has a little milky color discharge.Her belly is very tight when she is on her back feet when I rub her belly. On Aug 26 took her to the vet and he said it was to early to tell yet.I am getting morning sickness. Do u think she is pregnant? From what date to what date would be her due date?

    • Your dog will be due around September 20th. I am always expecting the pups to come a week before the due date so be prepared. The vet could have done a blood test to determine if she was pregnant. Now you can bring her in for a X-ray to actually see the skeletons of the pups to confirm how many pups she has.

  8. We are registered breeders but still new to the process. We had 2 locks – 4 days appear – and wanted to knownhowbthe second lock affects the due date. First lock was July 13, 2016, second was July 17. Ideally we wanted these closer together but had a last minute hiccup in coordinating schedules with our stud. Could you provide some insight as to how that second lock may affect her due dates so we have an idea when it is necessary to get out vet involved? She is very tired and comfotable at the moment. Pups are still very active inside her. She has given me no cause for concern at this point but I am getting anxious the closer we get t the 16th. I knownhaving the Pups in her too long can be detrimental. She has had 2 prior litters that have both gone around day 62 and had no issues with birth or delivery. We have never had to get a her involved with her in the past and like I said, She is exhibiting no signs of stress of discomfot that is concerning to make me think that we need vet intervention right now.

    Looking forward to your response.

    • You go off the first mating. A dogs cycle starts when she ovulates, not when sperm meets eggs.. this is why you go off first mate as a timeline because the sperm meet the eggs fairly quickly, unlike humans can take days.

      My shiah Tzu has gone a week over due once, all puppies were fine and in good health no intervention needed… 63 days is just the average, can be before – can be after.

      • My 4 yr old pugwas bred Valentine day week she appears to be in labor now panting hard resting not getting around very well now is it to early to have her pups

  9. My male dog went after my female dog 3 days before her heat stopped. That was around sept 22 2016. She has some signs that she is pregnant like swollen nipples and discharge. But her belly is not that big and she does not act like she is pregnant. This is her first litter and she is a small dog. She is a Yorkie pom min pin chi mixed…. she should be due in 2 weeks but like I said her belly is not even showing what could this mean

    • I would just keep an eye on her. When my baby girl was pregnant with her first litter she showed very few signs. We had noticed her nappies had grown, and we could feel very slight movement when she laid on us, but other than that her mood didn’t change, she was still extremely active, her belly was not that big, she was all around just her normal self. Don’t let the belly fool you though, we will had assumed because her belly was so small that she might only have 1 or 2 pups, and she ended up having 7.

    • Our boxer was bred, and we knew her nipples had changed early on, but she never enlarged. Turns out she has a singleton pup, which was too large for her to give birth to without caesarian section. That was the only time i have never done ultrasound by day 30. We had xray on day 56, to confirm pup. That day the pup would have been deliverable, but over the last week it grew enormously and if I hadn’t known for sure, we could have lost my baby girl.

  10. My girl is a few days past due. This is her first litter. She’s eating less this week. She doesn’t seem to be sick. I’m wondering how long should I wait.

  11. My collie is due on christmas day. So excited. Hope everything goes to plan, she is now starting to get alot bigger and her apetite is much larger so going well so far

  12. Oh phoebe know how you feel my lhaso is due say day more scared than her she so good at moment good luck

  13. My Lhasa Brandi is due her 2nd litter on March 6th she’s then going onto retirement bless her, ( keeping 2 this time ) I can’t wait!! she’s now almost 4weeks preggers hopfully I think she is anyway as she mated with her boyfriend laicon around 5 times, 5 locks… I’m just wondering why she’s not showing growth in her belly this time around though because I am sure she was already showing from her first pregnancy before now? What’s the chances of her even being preggers? I think her nips are more rosy n bigger but hard to tell with second breed as her nips are already big from first Litter 1 year ago. It was all planned correctly by her being receptive by the 13/14/15th day and like i said she had 5locks or more please let me know the likelyhood and odds that she is preggers or not? Thank you x

  14. Thank you for all the valuable information you provided as to what’s happening each week. We had an u/s yesterday and there are for sure 3 baby Bostons. Vet said bring her back a week before she whelps to get a better count!

  15. Hi,my little border is 54 days today from first and only mating.. she looked like she was going into labour yesterday at day 53 with a few contractions, shaking and nearly being sick.. today her tummy is very tight and low but have not seen any more contractions. she is still eating but not much.. if they were to be born tonight or tomorrow, would they survive ?

  16. Hello,I mated my lhasa apso on the 3/01/2017 that was her first mate,its five weeks now and her stomach is not out yet just that her Nipple is large and reddish at the tip.when she sit I can feel a little tighten down her stomach but if she is standing it’s small.when do pregnancy start to show in small dogs?.I really want to know if she is pregnant so I can start preparing

  17. My pug is 64 days pregnant to day n no signs ov her going in to labour is it OK 4 her to go ova ?

  18. i just like to say a big thanks been useing this site since we found out that when are dog got mated and today on this 10th march 2017 we are havin 4 puppys we went today and had a ultrasound and we carrying on useing until she give birth mum is chihuahua cross jack russell and the dad is chihuahua cross jack russell

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