Snap Tool Suite

Free Pet Calculators & Tools

Everything for life with a pet — their real age in human years, a budget for the year, the right tank size, and the paperwork and checklists for sitters and new arrivals. Free and instant in your browser.

Calculate my dog's age Browse all tools
Pet-care math you can trust Sitter agreements & checklists ready Instant, no sign-up
New pet or planning ahead? Find their real age with the Dog or Cat Age calculator, plan the spend with the Pet Budget Calculator, then get set up with the New Puppy Checklist.

Pet care & planning

Their age, budget, and the right setup at home.

Aquarium Volume Calculator

Calculate the volume and water capacity of your aquarium in gallons or liters based on shape and dimensions.

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Cat Age Calculator

Convert your cat's age to human years using the standard vet formula, with the life stage.

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Dog Age Calculator

Convert your dog's age to human years with the modern, size-adjusted vet formula — not the old "7 years" myth.

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Pet Budget Calculator

The monthly and yearly cost of owning a dog or cat — food, vet, grooming, insurance — plus one-time setup for a first-year total.

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New Puppy Checklist

Everything to get ready for a puppy — supplies, puppy-proofing, the first week, vet care, and early training. Progress saved.

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Pet care essentials The right setup, food, and supplies at home. Shop on Amazon → affiliate

Pet sitting & services

Price the job, paper the deal, and hand off care.

Pet Sitting Agreement Generator

Create a printable pet sitter contract — pets, dates, rate, vet and emergency details, access, and vet-care authorization.

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Pet Sitting Rate Calculator

Price a pet sitting or dog walking job — per-visit rate, visits, days, extra-pet fee, and a holiday surcharge.

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Pet Sitter Instructions Sheet

Create detailed pet care instructions for your sitter — feeding, medication, emergency contacts, and habits.

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Pet-sitting supplies Leashes, treats, and care-day basics. Shop on Amazon → affiliate

More pet tools

Every other tool for pet owners and sitters.

Dog Crate Size Calculator

What size crate your dog needs, from measurements or weight, using the standard length-plus-inches and height-plus-inches sizing rule.

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Dog Food Portion Calculator

How much to feed your dog by weight and life stage — cups per day and per meal, using the vet RER/MER feeding formula and your food's calories per cup.

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Pet Insurance Cost Estimator

A rough monthly premium for dog or cat insurance based on species, age, breed risk, coverage level, deductible, and reimbursement rate.

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More Pets gear & guides Top-rated picks to go with these pets tools. Shop on Amazon → affiliate

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