Kitchen & pets / Animals
Animal Pregnancy Calculator: Due Dates for Pets and Livestock
Work out when an animal is due from the mating date: dogs, cats, rabbits, guinea pigs, hamsters, ferrets, pigs, sheep, goats, cows, horses, donkeys, and alpacas, with the typical due date, the normal window, and how far along the pregnancy is today.
Animal Pregnancy Calculator: Due Dates for Pets and Livestock: The due date is the mating date plus the typical gestation for the species: a dog mated on 1 January is due around 5 March, 63 days later, and could give birth from 28 February. A cow bred on 1 January is due around 11 October, 283 days later. Runs 100% locally in your browser with zero server file uploads.
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| Animal | Typical | Range |
|---|---|---|
| Dog | 63 days | 58 to 72 days |
| Cat | 65 days | 58 to 67 days |
| Rabbit | 31 days | 28 to 35 days |
| Guinea pig | 65 days | 56 to 74 days |
| Hamster (Syrian) | 16 days | 16 to 18 days |
| Ferret | 42 days | 41 to 42 days |
| Pig | 114 days | 112 to 115 days |
| Sheep | 147 days | 144 to 152 days |
| Goat | 150 days | 145 to 155 days |
| Cow | 283 days | 279 to 287 days |
| Horse | 340 days | 320 to 370 days |
| Donkey | 365 days | 335 to 426 days |
| Alpaca | 345 days | 335 to 365 days |
Counted from the date of mating; with several matings, use the first for the earliest date. Dogs are the most variable when counted from mating, from 58 to 72 days, because sperm can wait for ovulation; from the day of ovulation it is 62 to 64 days. Contact a vet if a birth is overdue or the mother is in distress.
Sources
Typical lengths and ranges follow the Merck Veterinary Manual and university extension guides; breeds and individuals vary, and large litters tend to come a little early.
People
For a human due date, use the due date calculator.
How to use it
- Choose the animal.
- Enter the mating or breeding date.
- Read the due date, the normal window, and progress today.
Privacy & limitations
Everything is calculated in your browser.
Related tools
Frequently asked questions
How long is a dog pregnant?
About 63 days, but anywhere from 58 to 72 days after mating, because sperm can survive until the bitch ovulates; from ovulation it is 62 to 64 days.
How long is a cat pregnant?
About 65 days, usually between 58 and 67.
When should I call a vet?
If the birth is clearly overdue, if straining goes on without a birth, or if the mother seems unwell; a vet can confirm pregnancy and the litter size by ultrasound or X-ray.
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