Find the Best for Your Furry Friends

Free pet calculators

Instant answers, no account and no email. Feeding portions, aquarium volume, heater wattage, puppy growth, pet age and litter box planning.

• Chocolate toxicity calculatorMy dog ate chocolate — is it a dangerous dose for their weight?
• Dog pregnancy calculatorDue date, whelping window and a week-by-week timeline from the mating date.
• Dog food calculatorHow many calories and grams your dog actually needs each day.
• Cat food calculatorDaily calories for a cat, and why free-feeding goes wrong.
• Aquarium volume calculatorReal water volume, filter turnover and water change size.
• Heater wattage calculatorWhat wattage heater your tank needs, and when to use two.
• Puppy weight calculatorEstimate the adult weight of a growing puppy.
• Pet age calculatorDog and cat years done properly — not multiplied by seven.
• Litter box calculatorHow many boxes, how deep, and how much litter a month.
• Water intake calculatorHow much a dog or cat should drink a day — and when it is too much.
• Crate size calculatorWhich crate size fits your dog — home crate or airline (IATA) travel crate.
• Pet insurance calculatorWhat a quoted policy would really pay — and the vet bill where it breaks even.
• Raw dog food calculatorDaily raw portion by body weight, split into 80/10/10 meat, bone and organ.

See all free tools →