Work out incubation period instantly with clear inputs, formula shown and shareable results.
Adds the species-specific incubation period to the set date and marks the lockdown date three days before hatching, when turning stops.
Incubation periods
Chicken 21 days, quail 18, duck and turkey 28, goose 30; turning stops three days before the expected hatch
The chick must orient itself to pip the air cell, which turning would disturb.
Incubation below 37.5 degrees Celsius delays hatching and above it advances hatching, both reducing hatchability.