Gestation Calculator
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Get the free Android app: save your animals, see a calendar, share schedules. No pop-up ads.
Get it on Google Play

Animal gestation calculator

Pick the animal, enter the breeding date (or the day the eggs went into the incubator) and see the due date, the usual window and the milestones on the way. Every length comes from a university extension service or the Merck Veterinary Manual, and you can change it for your breed.
Works in your browser; nothing is saved here. The Android app keeps your animals and batches, a calendar and printable schedules on your phone, offline.
Animal
Bred on
Length (days)
63
Average: 63 days. Adjust it for your breed.
Due date
Mon, May 3, 2027
Usually Apr 28 – May 12, 2027

Milestones

    💕
    Bred
    Day 0 · Mon, Mar 1, 2027
    ⏳
    Halfway
    Day 31 · Thu, Apr 1, 2027
    🧺
    About a week to go: get a clean, quiet birthing area ready
    Day 56 · Mon, Apr 26, 2027
    🎉
    Due date (whelping)
    Day 63 · Mon, May 3, 2027

Gestation calculators

Dog pregnancy calculatorCat pregnancy calculatorCow gestation calculatorGoat gestation calculatorSheep gestation calculatorPig gestation calculatorHorse gestation calculatorRabbit gestation calculator

Egg hatching calendars

Chicken egg hatching calendarDuck egg hatching calendarMuscovy duck egg hatching calendarGoose egg hatching calendarTurkey egg hatching calendarQuail egg hatching calendarBobwhite quail egg hatching calendar

All animals at a glance

Animal gestation and incubation chartEn español

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Estimates from published averages. Every animal is different: ask your veterinarian.