Livestock Calculators
Menu

Sheep Gestation Calculator

Type the day your ewe was bred. Get her lambing date and the days to watch for heat.

1Animal

2Breeding

How she was bred

The day the ram bred her.

Due date

March 25, 2027Thursday

  • 147days, on average
  • Mar 22 to Mar 30normal range
  • 147days to go
  • Your ewe should lamb on Thursday, March 25, 2027. That is 147 days after she was bred.
  • The normal range is Mar 22 to Mar 30.
  • Watch her for heat on Nov 15 and Dec 2. If she comes into heat, she is not bred.
  • Next: Nov 29. Pregnancy check by ultrasound.
  • Today she is on day 0. 147 days to go.

Due Mar 25Answer

Her calendar

    When she is close

    • From about day 135, watch her. She may go off alone, paw the ground to make a nest, and eat less.
    • Her udder fills out. There may be mucus under her tail.
    • Once these signs show, she usually lambs within 12 to 24 hours.
    • Most ewes give birth within 2 hours after the water sac breaks.

    Call your vet if

    • She has pushed hard for 30 minutes and no lamb comes.

    Your herd

    Keep a list of your ewes and their due dates. Type a tag or a name, then add her. The list stays in this browser only.

    Gestation by animal

    Due dates are for the date you typed above: October 29, 2026.

    AnimalAverageSpreadDue dateSource
    Sheep147 days 144 to 152 days (normal range) Mar 25 New Mexico State University

    Sheep gestation chart

    Find the day she was bred. Next to it is her due date. This chart is for Sheep, bred in 2026.

    January

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

    February

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

    March

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

    April

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

    May

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

    June

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

    July

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

    August

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

    September

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

    October

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

    November

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

    December

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

    About the numbers

    Ewes carry their lambs about 147 days. Most lamb between day 144 and day 152.

    A ewe that is not bred comes back into heat in about 17 days. That is sooner than cows and goats, which take about 21 days.

    Questions

    How long is a sheep pregnant?

    About 147 days, or 5 months. The normal range is 144 to 152 days.

    When will my ewe come back into heat?

    Ewes come into heat about every 17 days. It can be 14 to 19 days.

    Why do some charts say 150 days?

    The Merck Veterinary Manual gives 150 days. New Mexico State gives 147, with a range of 144 to 152. We use 147.

    Sources

    Related calculators

    All calculators