Huisdieren Rekenmachines

Convert your dog's age to human years by breed size. Enter dog age and size category — see human-equivalent age and life stage. Free.

Convert your cat's age to human years. Enter cat age in years — see human-equivalent age, life stage, and typical health milestones. Free.

Daily dog food portions by weight and breed. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Daily cat food portions and calorie needs. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Check if your dog is a healthy weight. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Daily water needs for your dog by weight. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Estimate your puppy's adult weight from current weight and age. Enter breed, age, and current weight — see adult size prediction. Free.

Chocolate danger calculator for dogs. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Safe medication doses for dogs by weight. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Estimated lifespan by breed and size. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Ideal weight range for your cat. Based on WHO and clinical guidelines. Instant result with healthy range chart and interpretation.

Calculate annual pet food costs. Enter daily feeding amount and food price per bag — see monthly and annual spend with budget tips. Free.

Find the ideal aquarium size for your fish species. Enter fish type and count — see minimum tank size with stocking density rules. Free.

Find minimum cage dimensions for pet rabbits. Enter rabbit weight and breed — see minimum floor space and recommended setup. Free.

Convert hamster age to human years. Enter hamster age in months — see human-equivalent age with lifespan comparison. Free.

Convert parrot and pet bird age to human years. Enter species and bird age — see human-equivalent age with typical lifespan. Free.

Predict adult dog size from puppy measurements. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Raw feeding portions for dogs by weight. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Expected kitten due date and milestones. Based on clinical and medical guidelines. Instant result with week-by-week context.

Track your dog heat cycle and fertile days. Formula, worked example and unit conversions included. Instant thermodynamics solver.

Estimate annual and lifetime costs of pet ownership including food, vet, and insurance.