Cow calving date calculator
Cows carry for about 283 days, a little over nine months. Breed matters: Jerseys and Angus run a few days short, Brahman-influenced and continental breeds a few days long.
When is my cow due?
A cow bred today (October 4, 2026) is due around July 14, 2027, between July 5 and July 23, 2027.
| Bred | October 4, 2026 |
|---|---|
| Due date | July 14, 2027 (day 283) |
| Normal window | July 5, 2027 to July 23, 2027 (days 274 to 292) |
| Days until calving | in 283 days |
| Days pregnant today | 0 |
How it is calculated
- Start from the breeding date. Use the breeding or AI date. If the cow was bred more than once, use the last date.
- Add 283 days. The average cow carries for about 283 days, so the due date is 283 days after breeding.
- Mark the normal window. Most calving happens between day 274 and day 292, so watch from day 274 and call your vet if nothing has happened by day 292.
Buying or selling cattle?
Questions
How long is a cow pregnant?
About 283 days on average, with most calves born between day 274 and day 292.
Does the breed change the due date?
A little. British breeds and Jerseys average a few days under 283; Brahman, Simmental and other continental breeds a few days over.
When should I watch her closely?
From about two weeks before the due date: a springing udder, relaxed pelvic ligaments and separating from the herd mean calving is near.
Sources
The figures are standard published ranges; individual animals vary, so confirm with your veterinarian.
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