VelvetFields — Calculators
Livestock Gestation Calculator
Enter the mating date and species to calculate the expected due date.
Due Date Calculator
Gestation Periods Reference
| Species | Gestation | Notes |
|---|---|---|
| Cattle | 283 days (~9.5 months) | Range 279–287 days; earlier for heifers |
| Sheep | 147 days (~5 months) | Range 142–152 days; twins often a day earlier |
| Goats | 150 days (~5 months) | Range 145–155 days; smaller breeds slightly shorter |
| Pigs | 114 days (3 months, 3 weeks, 3 days) | Very consistent; range 110–118 days |
| Alpacas | 335–345 days (~11.5 months) | Highly variable; 11–12 months is normal range |
| Horses | 340 days (~11 months) | Range 320–370 days; wide natural variation |
| Rabbits | 31 days | Range 28–35 days |
| Deer (Fallow) | 230 days (~7.5 months) | Red deer: ~236 days; Fallow: ~228–234 days |