Lion

Lion Gestation Period: Free Calculator, Chart and Key Dates

A lion is pregnant for 110 days on average, which is 15 weeks and 5 days. The normal range is 105 to 115 days. Enter the mating date in the calculator below to receive the due date, the earliest and latest birthing dates and every milestone.

110 days

Average

105–115

Normal range (days)

2–4

Cubs per birth

What Is the Lion Gestation Calculator?

The lion gestation calculator is a free calculator that converts a mating date into a birthing date. Gestation is the time from conception to birth. A lion carries its young for 110 days on average, and a normal pregnancy ends between day 105 and day 115. Each birth produces 2–4 cubs.

The calculator returns:

Expected birthing date The most likely date, counted from your breeding date.
Earliest and latest normal dates Day 105 and day 115.
6 milestones With calendar dates, from day 21 to day 150.
Calendar file Add the dates to Google Calendar, Apple Calendar and Outlook.

Entering a target birthing date returns the matching mating date.

Example: a lion with a mating date of 1 March 2026 is due on 19 June 2026 (day 110). The normal range runs from 14 June 2026 (day 105) to 24 June 2026 (day 115).

Problems the Lion Gestation Calculator Solves

You do not know when the cubs are due. The calculator applies the 110-day average and the 105–115 day range to your date, so you know the day to prepare and the day the birthing window opens.
You are counting days by hand. Counting 110 days across months and years causes errors. The calculator performs the date arithmetic and shows each stage on a calendar.
You need to plan ahead. Each result dates 6 milestones, starting on day 21 (behavioural change is the first clue; hormone testing can confirm) and ending with the expected birthing on day 110.
You compare species. The calculator places the lion next to tiger and the other animals on the home page.

How the Lion Gestation Calculator Works

Enter the date. Use the mating date, or enter a target birthing date to work backwards.
Add your own gestation length (optional). Enter the figure your veterinarian gives you if it differs from the 110-day average.
Read the result. See the birthing date, the 105–115 day range and the milestones.
Save or share it. Add the dates to your calendar, print the chart, or copy a link that reopens the calculator with your dates.

Lion Timeline: Key Dates

This table lists the 6 milestones the calculator dates for a lion. Day numbers count from the mating date. The dates assume a mating date of 1 March 2026.

Lion milestones from mating date to birthing
Day	Date	Milestone
21	22 March 2026	Behavioural change is the first clue; hormone testing can confirm
45	15 April 2026	Ultrasound in managed care confirms the pregnancy and counts cubs
80	20 May 2026	Abdomen visibly enlarges; increase the ration
100	9 June 2026	Provide a private, quiet den site and stop all disturbance
110	19 June 2026	Expected birth
150	29 July 2026	Cubs are introduced to the pride at roughly six to eight weeks old

Source: published averages, loaded into the calculator. Each animal falls anywhere inside the 105–115 day range.

Why Choose Animal Gestation Calculator for Your Lion

A range with every date. You see day 105, day 110 and day 115, not one guess.
Your own gestation length. Enter the figure your veterinarian provides.
Dated milestones. Every milestone sits on your calendar.
Calendar export and printing. Add the dates to Google Calendar, Apple Calendar or Outlook, or print the 12-month breeding chart.
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.

Who Uses the Lion Gestation Calculator

Zookeepers and wildlife-park staff planning care around a due date.
Wildlife and biology students comparing gestation lengths.
Researchers and educators who need a sourced figure.
Nature writers checking how long a species carries its young.

Gestation Calculators for Other Wild Animals

Compare the lion’s 110 days with nearby wild animals: the tiger gestation calculator (105 days), the giraffe gestation calculator (430 days), the Asian elephant gestation calculator (617 days), the African elephant gestation calculator (645 days). The home page lists the gestation period of all 75 animals.

Lion 12-Month Breeding Date Chart

Based on a 110-day gestation, using 2027 as the example year. Find the breeding date on the left and the expected birthing date on the right. A year after the date means it falls in a later year. In a leap year, dates after 29 February move by a day.

January
Bred	Due
1	Apr 21
2	Apr 22
3	Apr 23
4	Apr 24
5	Apr 25
6	Apr 26
7	Apr 27
8	Apr 28
9	Apr 29
10	Apr 30
11	May 1
12	May 2
13	May 3
14	May 4
15	May 5
16	May 6
17	May 7
18	May 8
19	May 9
20	May 10
21	May 11
22	May 12
23	May 13
24	May 14
25	May 15
26	May 16
27	May 17
28	May 18
29	May 19
30	May 20
31	May 21

February
Bred	Due
1	May 22
2	May 23
3	May 24
4	May 25
5	May 26
6	May 27
7	May 28
8	May 29
9	May 30
10	May 31
11	Jun 1
12	Jun 2
13	Jun 3
14	Jun 4
15	Jun 5
16	Jun 6
17	Jun 7
18	Jun 8
19	Jun 9
20	Jun 10
21	Jun 11
22	Jun 12
23	Jun 13
24	Jun 14
25	Jun 15
26	Jun 16
27	Jun 17
28	Jun 18

March
Bred	Due
1	Jun 19
2	Jun 20
3	Jun 21
4	Jun 22
5	Jun 23
6	Jun 24
7	Jun 25
8	Jun 26
9	Jun 27
10	Jun 28
11	Jun 29
12	Jun 30
13	Jul 1
14	Jul 2
15	Jul 3
16	Jul 4
17	Jul 5
18	Jul 6
19	Jul 7
20	Jul 8
21	Jul 9
22	Jul 10
23	Jul 11
24	Jul 12
25	Jul 13
26	Jul 14
27	Jul 15
28	Jul 16
29	Jul 17
30	Jul 18
31	Jul 19

April
Bred	Due
1	Jul 20
2	Jul 21
3	Jul 22
4	Jul 23
5	Jul 24
6	Jul 25
7	Jul 26
8	Jul 27
9	Jul 28
10	Jul 29
11	Jul 30
12	Jul 31
13	Aug 1
14	Aug 2
15	Aug 3
16	Aug 4
17	Aug 5
18	Aug 6
19	Aug 7
20	Aug 8
21	Aug 9
22	Aug 10
23	Aug 11
24	Aug 12
25	Aug 13
26	Aug 14
27	Aug 15
28	Aug 16
29	Aug 17
30	Aug 18

May
Bred	Due
1	Aug 19
2	Aug 20
3	Aug 21
4	Aug 22
5	Aug 23
6	Aug 24
7	Aug 25
8	Aug 26
9	Aug 27
10	Aug 28
11	Aug 29
12	Aug 30
13	Aug 31
14	Sep 1
15	Sep 2
16	Sep 3
17	Sep 4
18	Sep 5
19	Sep 6
20	Sep 7
21	Sep 8
22	Sep 9
23	Sep 10
24	Sep 11
25	Sep 12
26	Sep 13
27	Sep 14
28	Sep 15
29	Sep 16
30	Sep 17
31	Sep 18

June
Bred	Due
1	Sep 19
2	Sep 20
3	Sep 21
4	Sep 22
5	Sep 23
6	Sep 24
7	Sep 25
8	Sep 26
9	Sep 27
10	Sep 28
11	Sep 29
12	Sep 30
13	Oct 1
14	Oct 2
15	Oct 3
16	Oct 4
17	Oct 5
18	Oct 6
19	Oct 7
20	Oct 8
21	Oct 9
22	Oct 10
23	Oct 11
24	Oct 12
25	Oct 13
26	Oct 14
27	Oct 15
28	Oct 16
29	Oct 17
30	Oct 18

July
Bred	Due
1	Oct 19
2	Oct 20
3	Oct 21
4	Oct 22
5	Oct 23
6	Oct 24
7	Oct 25
8	Oct 26
9	Oct 27
10	Oct 28
11	Oct 29
12	Oct 30
13	Oct 31
14	Nov 1
15	Nov 2
16	Nov 3
17	Nov 4
18	Nov 5
19	Nov 6
20	Nov 7
21	Nov 8
22	Nov 9
23	Nov 10
24	Nov 11
25	Nov 12
26	Nov 13
27	Nov 14
28	Nov 15
29	Nov 16
30	Nov 17
31	Nov 18

August
Bred	Due
1	Nov 19
2	Nov 20
3	Nov 21
4	Nov 22
5	Nov 23
6	Nov 24
7	Nov 25
8	Nov 26
9	Nov 27
10	Nov 28
11	Nov 29
12	Nov 30
13	Dec 1
14	Dec 2
15	Dec 3
16	Dec 4
17	Dec 5
18	Dec 6
19	Dec 7
20	Dec 8
21	Dec 9
22	Dec 10
23	Dec 11
24	Dec 12
25	Dec 13
26	Dec 14
27	Dec 15
28	Dec 16
29	Dec 17
30	Dec 18
31	Dec 19

September
Bred	Due
1	Dec 20
2	Dec 21
3	Dec 22
4	Dec 23
5	Dec 24
6	Dec 25
7	Dec 26
8	Dec 27
9	Dec 28
10	Dec 29
11	Dec 30
12	Dec 31
13	Jan 1 2028
14	Jan 2 2028
15	Jan 3 2028
16	Jan 4 2028
17	Jan 5 2028
18	Jan 6 2028
19	Jan 7 2028
20	Jan 8 2028
21	Jan 9 2028
22	Jan 10 2028
23	Jan 11 2028
24	Jan 12 2028
25	Jan 13 2028
26	Jan 14 2028
27	Jan 15 2028
28	Jan 16 2028
29	Jan 17 2028
30	Jan 18 2028

October
Bred	Due
1	Jan 19 2028
2	Jan 20 2028
3	Jan 21 2028
4	Jan 22 2028
5	Jan 23 2028
6	Jan 24 2028
7	Jan 25 2028
8	Jan 26 2028
9	Jan 27 2028
10	Jan 28 2028
11	Jan 29 2028
12	Jan 30 2028
13	Jan 31 2028
14	Feb 1 2028
15	Feb 2 2028
16	Feb 3 2028
17	Feb 4 2028
18	Feb 5 2028
19	Feb 6 2028
20	Feb 7 2028
21	Feb 8 2028
22	Feb 9 2028
23	Feb 10 2028
24	Feb 11 2028
25	Feb 12 2028
26	Feb 13 2028
27	Feb 14 2028
28	Feb 15 2028
29	Feb 16 2028
30	Feb 17 2028
31	Feb 18 2028

November
Bred	Due
1	Feb 19 2028
2	Feb 20 2028
3	Feb 21 2028
4	Feb 22 2028
5	Feb 23 2028
6	Feb 24 2028
7	Feb 25 2028
8	Feb 26 2028
9	Feb 27 2028
10	Feb 28 2028
11	Feb 29 2028
12	Mar 1 2028
13	Mar 2 2028
14	Mar 3 2028
15	Mar 4 2028
16	Mar 5 2028
17	Mar 6 2028
18	Mar 7 2028
19	Mar 8 2028
20	Mar 9 2028
21	Mar 10 2028
22	Mar 11 2028
23	Mar 12 2028
24	Mar 13 2028
25	Mar 14 2028
26	Mar 15 2028
27	Mar 16 2028
28	Mar 17 2028
29	Mar 18 2028
30	Mar 19 2028

December
Bred	Due
1	Mar 20 2028
2	Mar 21 2028
3	Mar 22 2028
4	Mar 23 2028
5	Mar 24 2028
6	Mar 25 2028
7	Mar 26 2028
8	Mar 27 2028
9	Mar 28 2028
10	Mar 29 2028
11	Mar 30 2028
12	Mar 31 2028
13	Apr 1 2028
14	Apr 2 2028
15	Apr 3 2028
16	Apr 4 2028
17	Apr 5 2028
18	Apr 6 2028
19	Apr 7 2028
20	Apr 8 2028
21	Apr 9 2028
22	Apr 10 2028
23	Apr 11 2028
24	Apr 12 2028
25	Apr 13 2028
26	Apr 14 2028
27	Apr 15 2028
28	Apr 16 2028
29	Apr 17 2028
30	Apr 18 2028
31	Apr 19 2028

Frequently Asked Questions

How long is a lion pregnant?

A lion is pregnant for 110 days on average, which is 15 weeks and 5 days. The normal range is 105 to 115 days. Use the lion gestation calculator for your animal’s date.

How many days is the pregnancy of a lion?

The average is 110 days. The shortest normal pregnancy is 105 days and the longest is 115 days, a spread of 10 days.

How do I calculate the due date?

Add 110 days to the mating date. A lion with a mating date of 1 March 2026 is due on 19 June 2026, within a range from 14 June 2026 to 24 June 2026. The calculator does the arithmetic for any date.

How accurate is the calculator?

The calculator gives an estimate from the published average. A normal pregnancy ends between day 105 and day 115. A veterinarian can give a more precise date for your animal.

How many young does a lion have?

Each birth produces 2–4 cubs.

What are the key dates in the pregnancy?

The calculator dates 6 milestones: day 21, behavioural change is the first clue; hormone testing can confirm; day 45, ultrasound in managed care confirms the pregnancy and counts cubs; day 80, abdomen visibly enlarges; increase the ration; day 100, provide a private, quiet den site and stop all disturbance; day 110, expected birth; day 150, cubs are introduced to the pride at roughly six to eight weeks old. The timeline table above lists each one.

When is the expected birthing date?

The expected birthing date is day 110, which is 15 weeks and 5 days after the mating date.

How does the pregnancy compare with other animals?

At 110 days the lion carries its young shorter than a human (280 days) and longer than a dog (63 days). The home page lists the gestation period of all 75 animals.

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, health and birthing, and contact a veterinarian immediately in an emergency.

Find Your Lion’s Due Date Now

Enter the mating date and receive the birthing date, the 105–115 day range and the milestones in seconds.

Open the free lion gestation calculator

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Important notice: All dates and figures are estimates for planning only and are not veterinary advice. Consult a qualified veterinarian.