A horse pregnancy lasts about 340 days, counted from the breeding date; most births fall between day 320 and day 370. Pick the breeding date below to see the due date, the usual window and the milestones on the way.
Bred on
Length (days)
340
Average: 340 days. Adjust it for your breed.
Due date
Fri, Feb 4, 2028
Usually Jan 15 – Mar 5, 2028
Milestones
💕
Bred
Day 0 · Mon, Mar 1, 2027
⏳
Halfway
Day 170 · Wed, Aug 18, 2027
🧺
About a week to go: get a clean, quiet birthing area ready
Day 333 · Fri, Jan 28, 2028
🎉
Due date (foaling)
Day 340 · Fri, Feb 4, 2028
How the date is worked out
Due date = breeding date + 340 days. Day 0 is the day of breeding, so a horse bred on Mar 1, 2027 is due on Feb 4, 2028, and births usually fall between Jan 15, 2028 and Mar 5, 2028. If the horse was bred on several days, count from the first breeding and expect the window to run to the last breeding + 370 days.
Good to know
Mares vary more than other farm animals: 320 to 370 days is normal, and many breeders mark 11 months after the last breeding so foals don’t arrive by surprise (Extension Foundation).
2027 gestation table: breeding date and due date
Every breeding date of 2027 with its due date (340 days later), month by month. Print it for the barn or kennel wall.
January 2027
Bred
Due
Jan 1
Dec 7, 2027
Jan 2
Dec 8, 2027
Jan 3
Dec 9, 2027
Jan 4
Dec 10, 2027
Jan 5
Dec 11, 2027
Jan 6
Dec 12, 2027
Jan 7
Dec 13, 2027
Jan 8
Dec 14, 2027
Jan 9
Dec 15, 2027
Jan 10
Dec 16, 2027
Jan 11
Dec 17, 2027
Jan 12
Dec 18, 2027
Jan 13
Dec 19, 2027
Jan 14
Dec 20, 2027
Jan 15
Dec 21, 2027
Jan 16
Dec 22, 2027
Jan 17
Dec 23, 2027
Jan 18
Dec 24, 2027
Jan 19
Dec 25, 2027
Jan 20
Dec 26, 2027
Jan 21
Dec 27, 2027
Jan 22
Dec 28, 2027
Jan 23
Dec 29, 2027
Jan 24
Dec 30, 2027
Jan 25
Dec 31, 2027
Jan 26
Jan 1, 2028
Jan 27
Jan 2, 2028
Jan 28
Jan 3, 2028
Jan 29
Jan 4, 2028
Jan 30
Jan 5, 2028
Jan 31
Jan 6, 2028
February 2027
Bred
Due
Feb 1
Jan 7, 2028
Feb 2
Jan 8, 2028
Feb 3
Jan 9, 2028
Feb 4
Jan 10, 2028
Feb 5
Jan 11, 2028
Feb 6
Jan 12, 2028
Feb 7
Jan 13, 2028
Feb 8
Jan 14, 2028
Feb 9
Jan 15, 2028
Feb 10
Jan 16, 2028
Feb 11
Jan 17, 2028
Feb 12
Jan 18, 2028
Feb 13
Jan 19, 2028
Feb 14
Jan 20, 2028
Feb 15
Jan 21, 2028
Feb 16
Jan 22, 2028
Feb 17
Jan 23, 2028
Feb 18
Jan 24, 2028
Feb 19
Jan 25, 2028
Feb 20
Jan 26, 2028
Feb 21
Jan 27, 2028
Feb 22
Jan 28, 2028
Feb 23
Jan 29, 2028
Feb 24
Jan 30, 2028
Feb 25
Jan 31, 2028
Feb 26
Feb 1, 2028
Feb 27
Feb 2, 2028
Feb 28
Feb 3, 2028
March 2027
Bred
Due
Mar 1
Feb 4, 2028
Mar 2
Feb 5, 2028
Mar 3
Feb 6, 2028
Mar 4
Feb 7, 2028
Mar 5
Feb 8, 2028
Mar 6
Feb 9, 2028
Mar 7
Feb 10, 2028
Mar 8
Feb 11, 2028
Mar 9
Feb 12, 2028
Mar 10
Feb 13, 2028
Mar 11
Feb 14, 2028
Mar 12
Feb 15, 2028
Mar 13
Feb 16, 2028
Mar 14
Feb 17, 2028
Mar 15
Feb 18, 2028
Mar 16
Feb 19, 2028
Mar 17
Feb 20, 2028
Mar 18
Feb 21, 2028
Mar 19
Feb 22, 2028
Mar 20
Feb 23, 2028
Mar 21
Feb 24, 2028
Mar 22
Feb 25, 2028
Mar 23
Feb 26, 2028
Mar 24
Feb 27, 2028
Mar 25
Feb 28, 2028
Mar 26
Feb 29, 2028
Mar 27
Mar 1, 2028
Mar 28
Mar 2, 2028
Mar 29
Mar 3, 2028
Mar 30
Mar 4, 2028
Mar 31
Mar 5, 2028
April 2027
Bred
Due
Apr 1
Mar 6, 2028
Apr 2
Mar 7, 2028
Apr 3
Mar 8, 2028
Apr 4
Mar 9, 2028
Apr 5
Mar 10, 2028
Apr 6
Mar 11, 2028
Apr 7
Mar 12, 2028
Apr 8
Mar 13, 2028
Apr 9
Mar 14, 2028
Apr 10
Mar 15, 2028
Apr 11
Mar 16, 2028
Apr 12
Mar 17, 2028
Apr 13
Mar 18, 2028
Apr 14
Mar 19, 2028
Apr 15
Mar 20, 2028
Apr 16
Mar 21, 2028
Apr 17
Mar 22, 2028
Apr 18
Mar 23, 2028
Apr 19
Mar 24, 2028
Apr 20
Mar 25, 2028
Apr 21
Mar 26, 2028
Apr 22
Mar 27, 2028
Apr 23
Mar 28, 2028
Apr 24
Mar 29, 2028
Apr 25
Mar 30, 2028
Apr 26
Mar 31, 2028
Apr 27
Apr 1, 2028
Apr 28
Apr 2, 2028
Apr 29
Apr 3, 2028
Apr 30
Apr 4, 2028
May 2027
Bred
Due
May 1
Apr 5, 2028
May 2
Apr 6, 2028
May 3
Apr 7, 2028
May 4
Apr 8, 2028
May 5
Apr 9, 2028
May 6
Apr 10, 2028
May 7
Apr 11, 2028
May 8
Apr 12, 2028
May 9
Apr 13, 2028
May 10
Apr 14, 2028
May 11
Apr 15, 2028
May 12
Apr 16, 2028
May 13
Apr 17, 2028
May 14
Apr 18, 2028
May 15
Apr 19, 2028
May 16
Apr 20, 2028
May 17
Apr 21, 2028
May 18
Apr 22, 2028
May 19
Apr 23, 2028
May 20
Apr 24, 2028
May 21
Apr 25, 2028
May 22
Apr 26, 2028
May 23
Apr 27, 2028
May 24
Apr 28, 2028
May 25
Apr 29, 2028
May 26
Apr 30, 2028
May 27
May 1, 2028
May 28
May 2, 2028
May 29
May 3, 2028
May 30
May 4, 2028
May 31
May 5, 2028
June 2027
Bred
Due
Jun 1
May 6, 2028
Jun 2
May 7, 2028
Jun 3
May 8, 2028
Jun 4
May 9, 2028
Jun 5
May 10, 2028
Jun 6
May 11, 2028
Jun 7
May 12, 2028
Jun 8
May 13, 2028
Jun 9
May 14, 2028
Jun 10
May 15, 2028
Jun 11
May 16, 2028
Jun 12
May 17, 2028
Jun 13
May 18, 2028
Jun 14
May 19, 2028
Jun 15
May 20, 2028
Jun 16
May 21, 2028
Jun 17
May 22, 2028
Jun 18
May 23, 2028
Jun 19
May 24, 2028
Jun 20
May 25, 2028
Jun 21
May 26, 2028
Jun 22
May 27, 2028
Jun 23
May 28, 2028
Jun 24
May 29, 2028
Jun 25
May 30, 2028
Jun 26
May 31, 2028
Jun 27
Jun 1, 2028
Jun 28
Jun 2, 2028
Jun 29
Jun 3, 2028
Jun 30
Jun 4, 2028
July 2027
Bred
Due
Jul 1
Jun 5, 2028
Jul 2
Jun 6, 2028
Jul 3
Jun 7, 2028
Jul 4
Jun 8, 2028
Jul 5
Jun 9, 2028
Jul 6
Jun 10, 2028
Jul 7
Jun 11, 2028
Jul 8
Jun 12, 2028
Jul 9
Jun 13, 2028
Jul 10
Jun 14, 2028
Jul 11
Jun 15, 2028
Jul 12
Jun 16, 2028
Jul 13
Jun 17, 2028
Jul 14
Jun 18, 2028
Jul 15
Jun 19, 2028
Jul 16
Jun 20, 2028
Jul 17
Jun 21, 2028
Jul 18
Jun 22, 2028
Jul 19
Jun 23, 2028
Jul 20
Jun 24, 2028
Jul 21
Jun 25, 2028
Jul 22
Jun 26, 2028
Jul 23
Jun 27, 2028
Jul 24
Jun 28, 2028
Jul 25
Jun 29, 2028
Jul 26
Jun 30, 2028
Jul 27
Jul 1, 2028
Jul 28
Jul 2, 2028
Jul 29
Jul 3, 2028
Jul 30
Jul 4, 2028
Jul 31
Jul 5, 2028
August 2027
Bred
Due
Aug 1
Jul 6, 2028
Aug 2
Jul 7, 2028
Aug 3
Jul 8, 2028
Aug 4
Jul 9, 2028
Aug 5
Jul 10, 2028
Aug 6
Jul 11, 2028
Aug 7
Jul 12, 2028
Aug 8
Jul 13, 2028
Aug 9
Jul 14, 2028
Aug 10
Jul 15, 2028
Aug 11
Jul 16, 2028
Aug 12
Jul 17, 2028
Aug 13
Jul 18, 2028
Aug 14
Jul 19, 2028
Aug 15
Jul 20, 2028
Aug 16
Jul 21, 2028
Aug 17
Jul 22, 2028
Aug 18
Jul 23, 2028
Aug 19
Jul 24, 2028
Aug 20
Jul 25, 2028
Aug 21
Jul 26, 2028
Aug 22
Jul 27, 2028
Aug 23
Jul 28, 2028
Aug 24
Jul 29, 2028
Aug 25
Jul 30, 2028
Aug 26
Jul 31, 2028
Aug 27
Aug 1, 2028
Aug 28
Aug 2, 2028
Aug 29
Aug 3, 2028
Aug 30
Aug 4, 2028
Aug 31
Aug 5, 2028
September 2027
Bred
Due
Sep 1
Aug 6, 2028
Sep 2
Aug 7, 2028
Sep 3
Aug 8, 2028
Sep 4
Aug 9, 2028
Sep 5
Aug 10, 2028
Sep 6
Aug 11, 2028
Sep 7
Aug 12, 2028
Sep 8
Aug 13, 2028
Sep 9
Aug 14, 2028
Sep 10
Aug 15, 2028
Sep 11
Aug 16, 2028
Sep 12
Aug 17, 2028
Sep 13
Aug 18, 2028
Sep 14
Aug 19, 2028
Sep 15
Aug 20, 2028
Sep 16
Aug 21, 2028
Sep 17
Aug 22, 2028
Sep 18
Aug 23, 2028
Sep 19
Aug 24, 2028
Sep 20
Aug 25, 2028
Sep 21
Aug 26, 2028
Sep 22
Aug 27, 2028
Sep 23
Aug 28, 2028
Sep 24
Aug 29, 2028
Sep 25
Aug 30, 2028
Sep 26
Aug 31, 2028
Sep 27
Sep 1, 2028
Sep 28
Sep 2, 2028
Sep 29
Sep 3, 2028
Sep 30
Sep 4, 2028
October 2027
Bred
Due
Oct 1
Sep 5, 2028
Oct 2
Sep 6, 2028
Oct 3
Sep 7, 2028
Oct 4
Sep 8, 2028
Oct 5
Sep 9, 2028
Oct 6
Sep 10, 2028
Oct 7
Sep 11, 2028
Oct 8
Sep 12, 2028
Oct 9
Sep 13, 2028
Oct 10
Sep 14, 2028
Oct 11
Sep 15, 2028
Oct 12
Sep 16, 2028
Oct 13
Sep 17, 2028
Oct 14
Sep 18, 2028
Oct 15
Sep 19, 2028
Oct 16
Sep 20, 2028
Oct 17
Sep 21, 2028
Oct 18
Sep 22, 2028
Oct 19
Sep 23, 2028
Oct 20
Sep 24, 2028
Oct 21
Sep 25, 2028
Oct 22
Sep 26, 2028
Oct 23
Sep 27, 2028
Oct 24
Sep 28, 2028
Oct 25
Sep 29, 2028
Oct 26
Sep 30, 2028
Oct 27
Oct 1, 2028
Oct 28
Oct 2, 2028
Oct 29
Oct 3, 2028
Oct 30
Oct 4, 2028
Oct 31
Oct 5, 2028
November 2027
Bred
Due
Nov 1
Oct 6, 2028
Nov 2
Oct 7, 2028
Nov 3
Oct 8, 2028
Nov 4
Oct 9, 2028
Nov 5
Oct 10, 2028
Nov 6
Oct 11, 2028
Nov 7
Oct 12, 2028
Nov 8
Oct 13, 2028
Nov 9
Oct 14, 2028
Nov 10
Oct 15, 2028
Nov 11
Oct 16, 2028
Nov 12
Oct 17, 2028
Nov 13
Oct 18, 2028
Nov 14
Oct 19, 2028
Nov 15
Oct 20, 2028
Nov 16
Oct 21, 2028
Nov 17
Oct 22, 2028
Nov 18
Oct 23, 2028
Nov 19
Oct 24, 2028
Nov 20
Oct 25, 2028
Nov 21
Oct 26, 2028
Nov 22
Oct 27, 2028
Nov 23
Oct 28, 2028
Nov 24
Oct 29, 2028
Nov 25
Oct 30, 2028
Nov 26
Oct 31, 2028
Nov 27
Nov 1, 2028
Nov 28
Nov 2, 2028
Nov 29
Nov 3, 2028
Nov 30
Nov 4, 2028
December 2027
Bred
Due
Dec 1
Nov 5, 2028
Dec 2
Nov 6, 2028
Dec 3
Nov 7, 2028
Dec 4
Nov 8, 2028
Dec 5
Nov 9, 2028
Dec 6
Nov 10, 2028
Dec 7
Nov 11, 2028
Dec 8
Nov 12, 2028
Dec 9
Nov 13, 2028
Dec 10
Nov 14, 2028
Dec 11
Nov 15, 2028
Dec 12
Nov 16, 2028
Dec 13
Nov 17, 2028
Dec 14
Nov 18, 2028
Dec 15
Nov 19, 2028
Dec 16
Nov 20, 2028
Dec 17
Nov 21, 2028
Dec 18
Nov 22, 2028
Dec 19
Nov 23, 2028
Dec 20
Nov 24, 2028
Dec 21
Nov 25, 2028
Dec 22
Nov 26, 2028
Dec 23
Nov 27, 2028
Dec 24
Nov 28, 2028
Dec 25
Nov 29, 2028
Dec 26
Nov 30, 2028
Dec 27
Dec 1, 2028
Dec 28
Dec 2, 2028
Dec 29
Dec 3, 2028
Dec 30
Dec 4, 2028
Dec 31
Dec 5, 2028
Frequently asked questions
How long is a horse pregnant?
About 340 days on average, counted from the breeding date; most births fall between day 320 and day 370.
How do I calculate a horse due date?
Add 340 days to the breeding date. Example: bred on Mar 1, 2027, due on Feb 4, 2028. The calculator above does it for any date and lists the milestones.
What if the horse goes past the due date?
Most births fall by day 370 after breeding. If that day passes, or anything about the mother worries you, call your veterinarian.
Can I use a different length for my breed?
Yes. Change the length (in days) in the calculator; the date, the window and the milestones move with it. The Android app keeps the length for each animal or batch you save.
Where the numbers come from
Sources: Extension Foundation (Horses): Management of the Pregnant Mare. Breeds and individual animals differ; change the length in the calculator if yours usually runs early or late. These dates are estimates, not veterinary advice: ask your veterinarian about your animal.