Animal Gestation Calculator

Lion Gestation Calculator

A lion's gestation period is about 110 days, or roughly 3 months and 2 weeks, though it ranges from 105 to 115 days depending on breed and individual animal.

How to use the lion gestation calculator

  1. 1. Choose what you know. Enter the breeding date to get a due date, or switch to the target due date mode to work backwards to the breeding date you need.
  2. 2. Refine the inputs. The calculator uses the 110-day average for this species.
  3. 3. Plan around the range. Use the earliest and latest dates and the milestone timeline to schedule checks, feed changes and preparation of the birthing area.

Calculate a cub due date

What do you know?

Estimated birthing date

Thursday, 31 December 2026

Earliest

26 Dec 2026

Latest

5 Jan 2027

110 days remaining0% complete

0 of 110 days elapsed

Milestone timeline

Key Lion pregnancy milestones with calculated calendar dates
DayMilestoneDate
21Behavioural change is the first clue; hormone testing can confirm3 Oct 2026
45Ultrasound in managed care confirms the pregnancy and counts cubs27 Oct 2026
80Abdomen visibly enlarges; increase the ration1 Dec 2026
100Provide a private, quiet den site and stop all disturbance21 Dec 2026
108Expected birth29 Dec 2026
150Cubs are introduced to the pride at roughly six to eight weeks old9 Feb 2027

What to do next

How long is a lion's gestation period?

The average is 110 days from breeding to birthing, about 3 months and 2 weeks. Anything between 105 and 115 days is normal, and a typical litter is 2-4 cubs. Treat the calculated date as the middle of that window rather than a fixed appointment.

Lion gestation table: breeding date to birthing date

Breeding dates one week apart with the matching birthing date at 110 days.

Twelve sample Lion breeding dates and their calculated due dates
Breeding dateExpected birthing date
12 Sept 202631 Dec 2026
19 Sept 20267 Jan 2027
26 Sept 202614 Jan 2027
3 Oct 202621 Jan 2027
10 Oct 202628 Jan 2027
17 Oct 20264 Feb 2027
24 Oct 202611 Feb 2027
31 Oct 202618 Feb 2027
7 Nov 202625 Feb 2027
14 Nov 20264 Mar 2027
21 Nov 202611 Mar 2027
28 Nov 202618 Mar 2027

Working backwards from a target birthing date

If you want cubs on the ground in a particular week, switch the calculator to target date mode and enter the date you are aiming for. It subtracts 110 days to give the breeding date to book, plus the earliest and latest service dates that still land inside your window.

Lion gestation calculator FAQs

How long is a lion pregnant?

About 108 days, roughly three and a half months, with a normal range of 100 to 115 days. It is short for an animal of that size because the cubs are born very small and undeveloped.

Where does a lioness give birth?

Away from the pride, in dense cover, thick reeds or among rocks. She keeps the cubs hidden for six to eight weeks and moves them between den sites before introducing them to the pride.

How many cubs are in a litter?

Usually two to four, occasionally up to six. In the wild survival is harsh — roughly half or fewer reach two years — with predation, starvation during hard times and infanticide by incoming males all taking a toll.

Why do lionesses in a pride give birth at the same time?

Their cycles synchronise, so litters arrive together and the females nurse each other's cubs. Communal rearing means cubs are rarely left unguarded and a lioness who loses milk does not automatically lose her litter.

What happens if new males take over the pride?

They commonly kill cubs under about a year old, which brings the lionesses back into oestrus within weeks. It is brutal but it is the main reason a lioness hides her cubs so carefully in the first two months.

More gestation pages

Wild animal gestation chart