Cow Gestation Calculator

Your details

Forward mode: enter when she was bred to find the due date. Reverse mode: enter when you want her to calve to find the required breeding date.
The date the cow was bred naturally or artificially inseminated.
Breed affects average gestation length. Brahman-influenced cattle carry calves several days longer than British breeds.
First-calf heifers often have a longer postpartum interval (65 days) before cycling again vs. 55 days for mature cows.
Expected calving date
August 9, 2027

Estimated date the calf will be born based on breed-average gestation.

Gestation period used282days
Pregnancy check windowNovember 30, 2026 to December 15, 2026
Dry-off date (dairy)June 10, 2027
Pre-calving vaccination windowJune 14, 2027 to June 28, 2027
Earliest rebred dateOctober 3, 2027
Days since bred0days
282 days
  • Breeding date
  • Preg check
  • Trimester 2
  • Trimester 3
  • Due date

Expected calving date: August 9, 2027

  • Angus cattle have a breed-average gestation of 282 days. Actual births can fall 10 days either side of this estimate.

Next stepBook a pregnancy confirmation ultrasound during the window shown above. Early confirmation avoids carrying open cows through winter.

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