Work out hatchery egg setting instantly with clear inputs, formula shown and shareable results.
Chick output is eggs set x fertility x hatch of fertile x saleable percentage. Working backwards, eggs to set is the chick requirement divided by that combined yield. Hatch of total eggs set — fertility times hatch of fertile — is the number that matters commercially, typically 80-85% in a well-run hatchery.
Hatchery yield
Overall yield = fertility % x hatch of fertile % x saleable %
Eggs to set
Eggs to set = chicks required / overall yield
Breeder flock age, male-to-female ratio, mating activity, nutrition and heat stress. Fertility falls steadily after about 45 weeks of breeder age.
Yes. Hatchability falls roughly 0.5-1% per day of storage beyond four days, and pre-storage incubation or turning is needed for longer holds.