Free Egg Incubation Date calculator with clear step-by-step results.
Incubation length is species-specific, and the two dates that matter alongside the hatch date are the first candling - around day seven, when fertility becomes visible - and lockdown three days before hatch, when turning stops and humidity is raised so chicks can position and pip.
Hatch date
Hatch = set date + species incubation days
Lockdown
Lockdown = hatch date - 3 days
The embryo needs to orient itself toward the air cell to internally pip. Turning after that point can disorient it and cause a failure to hatch.
Give it 48 hours. Cool running incubators delay hatching by a day or more, and opening the incubator during lockdown can be fatal to chicks mid-hatch.