The math every breeding program runs on — heat timing, due dates, and puppy milestones — built on the same engine that powers Whelpify dashboards.
Predict your female dog's next heat and likely fertile window from her last heat date — with an honest ± range, not a fake-precise date.
Open the calculator When are the puppies due?Calculate when the puppies are due from the ovulation date, LH surge, or breeding date — plus a pregnancy timeline with ultrasound and X-ray windows.
Open the calculator From birth to go-home day, mapped out.Enter a litter’s birth date and get the full development timeline: eyes opening, weaning, first vaccines, socialization windows, and go-home day.
Open the calculator How big will this puppy get?Estimate a puppy's adult weight from their current age and weight using size-class growth curves — with an honest range, plus when they'll finish growing.
Open the calculatorSet up your whole system in minutes — from litters and puppies to payments and applications. Try everything free for 30 days, then choose monthly or yearly billing.
30 days free. Cancel anytime before the trial ends and pay nothing.