Animal Pregnancy Calculators — Biology
Gestation and due dates by species: dogs, cats, cattle and alpacas, with breed adjustments where they apply. Gestation lengths are species averages with real variation, so treat any due date as the centre of a window.
All Animal Pregnancy Calculators
Calculate alpaca gestation with inputs, formulas, and instant results.
Calculate cat pregnancy with inputs, formulas, and instant results.
Calculate cow gestation with inputs, formulas, and instant results.
Calculate dog pregnancy with inputs, formulas, and instant results.
Calculate goat gestation with inputs, formulas, and instant results.
Calculate guinea pig pregnancy with inputs, formulas, and instant results.
Calculate llama gestation with inputs, formulas, and instant results.
Calculate mare gestation with inputs, formulas, and instant results.
Calculate rabbit gestation with inputs, formulas, and instant results.
Calculate sheep gestation with inputs, formulas, and instant results.
Calculate swine gestation with inputs, formulas, and instant results.
Estimate your Pregnancy using LMP and Naegele's rule. Enter your last period date to see estimated due date, conception window, and trimester.
Plan nutrition for each pregnancy trimester with symptom management
About Animal Pregnancy Calculators
Gestation and due dates by species: dogs, cats, cattle and alpacas, with breed adjustments where they apply. Gestation lengths are species averages with real variation, so treat any due date as the centre of a window.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common animal pregnancy scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 13 tools: Alpaca Gestation Calculator, Cat Pregnancy Calculator — Due Date & Gestation, Cow Gestation Calculator, Dog Pregnancy Calculator: Due Date by Breed, Goat Gestation Calculator, Guinea Pig Pregnancy Calculator — Due Date, Llama Gestation Calculator, Mare Gestation Calculator, and 5 more. Each calculator is free to use with no signup required.