Biology Calculators
Cow Pregnancy Calculator
Estimate calving start and postpartum interval end from exposure date, with first-time calver adjustments.
Use this cow pregnancy calculator to estimate key breeding timeline dates from the date your cow was exposed to a bull or inseminated.
Calving start is calculated as exposure date + 283 days.
End of postpartum interval is calculated from calving start: +65 days for first-time calvers, or +55 days for cows that have calved before.