All animals
All Animal Gestation Calculators: Pets, Livestock, Wild Animals, Fish and Birds
Animal Gestation Calculator covers 75 animals, from the 13-day Virginia opossum to the 645-day African elephant. Pick an animal in the calculator below, or open one of the 27 calculator pages in the table. Each page gives a due date, a source-based window and the key milestones for its animal.
75
Animals in the chart
27
Calculator pages
13–645
Days, shortest to longest
Gestation Period of Every Animal Page
This table links to every calculator page, with the average gestation or incubation time in days and reported range.
| Animal | Group | Average days | Range (days) | Page |
|---|---|---|---|---|
| Dog | Pets | 63 | 58–72 | dog calculator |
| Cat | Pets | 64 | 61–67 | cat calculator |
| Rabbit | Pets | 31 | 28–33 | rabbit calculator |
| Guinea pig | Pets | 68 | 59–72 | guinea pig calculator |
| Hamster | Pets | 16 | 15–18 | hamster calculator |
| Gerbil | Pets | 25 | 24–26 | gerbil calculator |
| Rat | Pets | 22 | 21–23 | rat calculator |
| Mouse | Pets | 20 | 19–21 | mouse calculator |
| Chinchilla | Pets | 111 | 105–118 | chinchilla calculator |
| Ferret | Pets | 42 | 38–44 | ferret calculator |
| Cow | Livestock | 283 | 279–293 | cow calculator |
| Horse | Livestock | 340 | 320–370 | horse calculator |
| Goat | Livestock | 150 | 145–155 | goat calculator |
| Sheep | Livestock | 147 | 144–152 | sheep calculator |
| Pig | Livestock | 114 | 112–116 | pig calculator |
| Donkey | Livestock | 365 | 340–390 | donkey calculator |
| Alpaca | Livestock | 345 | 335–355 | alpaca calculator |
| Llama | Livestock | 350 | 330–365 | llama calculator |
| Camel | Livestock | 395 | 390–410 | camel calculator |
| Water buffalo | Livestock | 310 | 300–320 | water buffalo calculator |
| Lion | Wild animals | 110 | 105–115 | lion calculator |
| Tiger | Wild animals | 105 | 93–112 | tiger calculator |
| Giraffe | Wild animals | 430 | 400–460 | giraffe calculator |
| African elephant | Wild animals | 645 | 640–660 | african elephant calculator |
| Asian elephant | Wild animals | 617 | 600–640 | asian elephant calculator |
| Fish | Fish | 28 | 2–40 | fish calculator |
| Birds | Birds | 21 | 12–45 | birds calculator |
Pets and Small Pets
The pet pages cover the dog gestation calculator (63 days), the cat gestation calculator (64 days), the rabbit gestation calculator (31 days), the guinea pig gestation calculator (68 days), the hamster gestation calculator (16 days), the gerbil gestation calculator (25 days), the rat gestation calculator (22 days), the mouse gestation calculator (20 days), the chinchilla gestation chart (111 days) and the ferret gestation chart (42 days).
Livestock
The livestock pages cover the cow gestation calculator (283 days), the horse gestation calculator (340 days), the goat gestation calculator (150 days), the sheep gestation period page (147 days), the pig gestation calculator (114 days), the donkey gestation chart (365 days), the alpaca gestation chart (345 days), the llama gestation calculator (350 days), the camel gestation calculator (395 days) and the water buffalo gestation chart (310 days).
Wild Animals
The wild animal pages cover the lion gestation calculator (110 days), the tiger gestation calculator (105 days), the giraffe gestation period page (430 days), the African elephant gestation calculator (645 days) and the Asian elephant gestation period page (617 days).
Fish and Birds
The fish gestation calculator covers mollies, guppies, platies, swordtails, bettas, goldfish, angelfish and zebra danios. The bird incubation calculator covers chickens, ducks, turkeys, geese, quail, guinea fowl, pigeons, doves, parrots, finches, canaries and ostriches.
Why Choose Animal Gestation Calculator
- A range with every date. You see the earliest, average and latest date, not one guess.
- Every group in one place. Pets, livestock, wild animals, fish and birds.
- Calendar export. Add the dates to Google Calendar, Apple Calendar or Outlook.
- Free and private. No account is required, and your entries stay in your browser.
- Published sources. Every figure comes from a published average, and every page labels it an estimate.
Frequently Asked Questions
How many animals does the calculator cover?
The calculator and chart cover 75 animals: mammals, birds, fish and reptiles. Twenty-seven pages carry a dedicated calculator: 25 single-animal pages, the fish page and the bird page.
Which animal has the longest gestation period?
The African elephant, at 645 days on average, which is about 21 months. The African elephant gestation calculator gives the full range of 640 to 660 days.
Which animal has the shortest gestation period?
Among the mammals in the calculator, the Virginia opossum: 13 days on average, within a range of 12 to 14 days.
How do I use a gestation calculator?
Open the page for your animal, enter the mating date (or the date eggs were laid for birds and egg-laying fish) and read the due date, range and milestones. The home page also has a picker for all animals.
How accurate are the dates?
The dates are estimates from published averages. Each animal falls anywhere inside the range for its species, so the calculator shows an earliest, average and latest date.
Are the calculators free?
Yes. No account is required, and your entries stay in your browser.
Is the calculator veterinary advice?
No. The calculator provides estimates for planning only. Every animal is different. Consult a qualified veterinarian about your animal’s pregnancy and health, and contact a veterinarian immediately in an emergency.
Find Your Animal’s Due Date Now
Pick your animal, enter the date and receive the due date, the range and the milestones in seconds.
Read our Disclaimer, Privacy Policy and Terms of Use, or return to the Animal Gestation Calculator home page.
Important notice: All dates and figures are estimates for planning only and are not veterinary advice. Consult a qualified veterinarian.