The barn’s calculator.
Calculators & guides for everyone who raises animals.
Browse by animal
Pick an animal to see its calculators — gestation, breeding, weight, feed, age and more — each paired with a plain-language, sourced guide.
Farm & livestock
Cattle →
Gestation, calving, breeding, weight
Horses →
Foaling, gestation, weight, feed
Goats →
Gestation, kidding, heat cycle
Sheep →
Gestation, lambing, breeding
Pigs →
Farrowing, gestation, weight
Rabbits →
Gestation, breeding, kindling
Poultry →
Egg incubation, feed
Pets
Dogs →
Pregnancy, puppy weight, age, heat cycle
Cats →
Pregnancy, kitten weight, cat age
Guinea pigs →
Gestation & pregnancy
Most popular calculators
The tools people reach for most.
Cattle gestation →
Due date + calving window from breeding date
Puppy weight →
Predict adult weight from current age
Cat age →
Cat years in human terms
Horse foaling →
Foaling date from the covering date
Goat gestation →
Kidding date, chart and calendar
Sheep gestation →
Lambing date + management milestones
Why BarnCalc
Science-backed
Every figure is cross-checked against university extensions, breed associations and veterinary references — and cited.
Made for real animal raisers
Practical tools for farmers, breeders, homesteaders and pet owners — clear answers, no fluff.
Free & easy to use
Open, mobile-friendly, and instant. Every calculator comes with a guide and a printable chart.