All Pets & Animals Tools
Aquarium Stocking Calculator
Plan your fish tank with compatibility checks, bioload estimates, and stocking level guidance
Cat Age Calculator
Convert your cat's age to human years using the veterinary formula — the multiply-by-7 myth debunked
Dog Age Calculator
Convert your dog's age to human years using the scientific method — not just multiply by 7
Dog Pregnancy Calculator
Calculate your dog's due date, track week-by-week milestones, and prepare for whelping day
Fish Tank Volume Calculator
Calculate aquarium volume, water weight, heater size, and filter flow for rectangular, cylindrical, bow-front, hexagonal, and L-shaped tanks
Horse Weight Calculator
Estimate your horse's weight from heart girth and body length measurements using the standard equine formula
Lifetime Pet Cost Estimator
Calculate the total cost of owning a dog or cat over their entire lifetime, from adoption to senior care
Pet Calorie Calculator
Calculate daily calorie needs for your dog or cat using the veterinary RER formula based on weight, age, activity, and body condition
Pet Food Portion Calculator
Calculate the perfect daily food portions for your dog or cat based on weight, age, and activity level
Pet Travel Requirements Checker
Check country-by-country pet import requirements for dogs and cats — free, instant, no signup
Puppy Weight Predictor
Predict your puppy's adult weight based on current age, weight, and breed size using growth curve formulas
Raw Feeding Calculator
Calculate daily raw food amounts for dogs and cats using BARF and Prey Model Raw ratios based on weight, age, activity, and body condition
Pets & Animals Calculators on FastTools are free, browser-based tools designed to help pet owners, breeders, and animal enthusiasts get quick answers without signups or downloads. Every calculator runs entirely in your browser — your data never leaves your device.
Whether you're figuring out your dog's age in human years, planning a raw feeding schedule, sizing an aquarium, or estimating lifetime pet costs, these tools are built to be fast, accurate, and private. Pick any tool below to get started instantly.
Frequently Asked Questions
Are these pet calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.