Care decisions, actually answered.
67 free calculators for feeding, age, walks, costs, and breed compatibility — with the math vets actually use.
Most popular pet calculators
What thousands of owners are using right now.
NUTRITIONDog Food Calculator
Daily portions in cups and grams, based on RER/DER vet formulas.
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NUTRITIONCat Weight Loss Calculator
Calorie and portion targets for feline weight management.
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HEALTHPet Age Calculator
Convert pet age to human years, adjusted for breed size.
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HEALTHDog Pregnancy Calculator
Due dates and week-by-week gestation from mating date.
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LIFESTYLEDog Walking Calculator
Recommended daily distance by breed, age, and weather.
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BREEDSBreed Selector
Find breeds that fit your home, schedule, and family.
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FUNPet Name Generator
Hundreds of names filtered by style and species.
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Comprehensive calculators and tools organized by category.
Nutrition & feeding
Dog food, raw diets, cat calories, portions, protein — the math vets use.
Dog Food Calculator
Daily portions in cups and grams, based on RER/DER vet formulas.
Cat Weight Loss Calculator
Calorie and portion targets for feline weight management.
Raw Diet Planner
BARF meal plans — muscle, organ, and bone ratios by weight.
Food Safety Checker
Check any ingredient against known pet toxicity data.
Dog Weight Calculator
Find your dog's healthy weight range and body condition score, adjusted for breed — not a single generic number. Free calculator, instant results.
Dog Calorie Calculator
Calculate your dog's daily calorie needs using the RER/DER formula vets use — adjusted for age, activity, and spay/neuter status. Free, instant results.
Cat Feeding Chart (wet/dry)
Find your cat's exact feeding amount by weight, age, and food type in seconds — wet and dry portions aren't measured the same way. Free, updated for 2026.
Cat Food Calculator (portions)
Get your cat's exact daily portion in grams or cups based on weight, life stage, and the calorie density of your specific food. Free, instant.
Dog Protein Calculator
Get your dog's daily protein target in grams, adjusted for growth, activity, and life stage. Free calculator, results in seconds.
Dog RER / Kcal Calculator (vet-advanced mode)
Calculate Resting Energy Requirement using the exact WSAVA-referenced formula: 70 × (weight in kg)^0.75. Free, instant results.
Dog Food Calculator by Weight & Age (filtered view)
Enter your dog's exact weight and age for a portion recommendation that adjusts automatically as they grow. Free calculator, instant results.
Cat Weight Loss Calculator (standalone)
Calculate a safe weight-loss calorie target for your cat — rapid weight loss carries real health risks this tool is built to avoid. Free.
Dog Feeding Calculator — Weight Loss Mode
A weight-loss-specific portion calculator using a conservative calorie deficit — because crash dieting a dog carries its own risks. Free.
Health & wellness
Age, vet costs, insurance, vaccinations, dosages, and body condition.
Pet Age Calculator
Convert pet age to human years, adjusted for breed size.
Vet Cost Estimator
Annual vet cost estimates by region and pet type.
Pet Insurance Calculator
Compare plan costs against your pet's expected care.
Vaccination Schedule
Personalized vaccination timelines from puppy to senior.
Weight Tracker
Track body condition score over time.
Dog Pregnancy Calculator
Due dates and week-by-week gestation from mating date.
Dog Age Calculator
Skip the "multiply by 7" myth. Our dog age calculator uses the size-adjusted formula vets actually reference, based on breed weight class.
Cat Age Calculator
Find your cat's real human-equivalent age with the vet-referenced formula — not the outdated "multiply by 7" rule. Free, instant results.
Chocolate Toxicity Calculator (dog)
Different chocolate types have very different toxicity levels. Enter your dog's weight and the chocolate eaten to check the risk instantly. Free.
Benadryl Dosage Calculator for Dogs
Enter your dog's weight for the standard 1mg-per-pound Benadryl range, plus when Benadryl isn't the right choice. Vet-reviewed reference — free.
Dog Quality of Life Calculator
A scored assessment based on the HHHHHMM scale vets use with hospice and senior-care families, to help bring clarity to a hard decision. Free.
Meloxicam Dosage Calculator for Dogs
See how vets calculate meloxicam dosing by weight and why exact dosing must always come from your prescribing veterinarian. Free reference.
Trazodone Dosage for Dogs
Trazodone dosing for dogs varies by use case — situational anxiety vs. post-surgical calm. See how vets typically approach the math. Free reference.
Dog BMI Calculator
Dogs don't have an official BMI formula — here's the body condition scoring approach vets use instead, with a weight-based estimate. Free.
Cat BMI Calculator
Cats don't have a true BMI formula like humans — here's the body condition method vets actually use, plus a weight-range estimate. Free.
Prednisone Dosage for Dogs
Prednisone dosing for dogs differs significantly by condition — anti-inflammatory vs. immunosuppressive. See how the math and tapering work. Free.
Dog Growth Calculator (puppy growth curve)
Plot your puppy's weight against expected breed-size growth curves to spot whether growth is tracking normally. Free, instant results.
Cat Pregnancy Due Date Calculator
Estimate your cat's kittening date and track gestation week by week — cat pregnancies run shorter than dogs' at roughly 63-65 days. Free.
Dog Heat Cycle Calculator
Estimate your dog's heat cycle stages and fertile window based on cycle history — most female dogs cycle roughly every 6 months. Free.
Cat Chocolate Toxicity Calculator
Cats are more sensitive to theobromine than dogs pound-for-pound, even though chocolate ingestion is rarer. Check the risk by weight. Free.
Is My Dog Overweight? Calculator
A fast, vet-referenced way to check — feel for ribs, look for a waist, check the abdominal tuck. Get your dog's body condition score in a minute.
Diazepam Dosage Chart for Dogs
Diazepam is a controlled, prescription-only medication for dogs — see the general weight-based reference and why exact dosing must come from your vet.
Gabapentin Dosage for Dogs
Gabapentin is commonly used for pain, anxiety, and pre-vet-visit sedation in dogs. See how the weight-based math typically works. Free reference.
Dog Medication Dosage Hub (multi-drug selector)
A navigation hub linking weight-based dosage references for the most commonly asked-about dog medications — always vet-confirmed before dosing. Free.
Dog Tylenol/Acetaminophen Warning Calculator
Acetaminophen (Tylenol) isn't safe for routine use in dogs and is outright toxic to cats — here's why, and what to do if your pet got into it. Free.
Vaccination Cost Calculator
Estimate first-year and annual vaccination costs, broken down by core (required) versus non-core (lifestyle-dependent) vaccines. Free.
Dog Sunburn / Heat Index Safety Calculator
Check whether it's safe to walk your dog right now based on air temperature, humidity, and pavement surface — free, instant results.
Lifestyle & care
Walking, litter, travel, grooming, puppy growth, and household costs.
Dog Walking Calculator
Recommended daily distance by breed, age, and weather.
Litter Box Calculator
Optimal cleaning schedule for single and multi-cat homes.
Pet Travel Estimator
Costs and logistics for flying or driving with a pet.
Adoption Cost Calculator
First-year budget estimate — supplies, vet, food, extras.
Puppy Weight Calculator
Estimate your puppy's adult weight using growth-rate math, not guesswork — works for purebred and mixed-breed puppies. Free, results in seconds.
Dog Size Calculator (How Big Will My Dog Get)
See where your dog falls on the toy-to-giant size scale, with expected adult weight ranges for each category. Free, instant results.
Pet Sitter Rate Calculator
Get a fair-rate estimate for overnight pet sitting based on number of pets, visit length, and location cost-of-living. Free calculator.
Mixed-Breed Puppy Weight Calculator
No purebred standard to reference? Estimate adult weight from current weight, age, and paw size instead. Free for mixed-breed puppies.
Dog Exercise Calculator
Get a daily exercise time recommendation based on breed energy level, age, and health status — not a one-size-fits-all 30-minute rule. Free.
Pet Transport / Shipping Cost Calculator
Compare estimated costs for airline cargo, in-cabin flying, and professional ground transport services for your pet. Free, instant results.
Dog Training Cost Calculator
Compare estimated costs across group classes, private in-home training, and board-and-train programs. Free calculator, instant results.
Cat Cost Calculator (lifetime & monthly)
Estimate the real lifetime cost of cat ownership — food, litter, vet care, and the occasional emergency — broken down by year. Free, instant.
Dog Grooming Cost & Frequency Calculator
Estimate what professional grooming should cost for your dog's coat type and size, plus how often you actually need it. Free, instant results.
Litter Cost Calculator
Compare monthly litter costs across clumping clay, crystal, and natural litter types, adjusted for number of cats. Free, instant results.
Multi-Pet Household Cost Calculator
Combine food, vet care, litter, and grooming estimates across all your pets for one total monthly and annual cost. Free, instant results.
Breed information
Lifespan, selectors, compatibility, and breed-specific guides.
Breed Lifespan Calculator
Breed-specific lifespan ranges with health factors.
Breed Selector
Find breeds that fit your home, schedule, and family.
Compatibility Checker
Check how different breeds get on with kids and other pets.
Dog Breed Identifier Quiz
A trait-based identifier quiz for mixed-breed dogs — size, coat, ear shape, and behavior patterns, cross-referenced against 100+ breeds. Free.
Mixed-Breed Life Expectancy Calculator
Mixed-breed dogs often outlive purebreds of similar size. See what actually predicts lifespan when there's no single breed standard. Free.
Dog Breed Percentage / Ancestry Estimator
Get a rough breed-mix estimate from physical traits, or see what a DNA test (typically $70-150) adds in precision. Free, instant results.
Fun & social
Names, birthdays, horoscopes, memories, and novelty tools.
Pet Name Generator
Hundreds of names filtered by style and species.
Birthday Calculator
Exact age in months, weeks, and human-year equivalent.
Pet Horoscope
Personality notes based on birth date and breed.
Pet Memories
Log milestones, earn badges, and build a timeline.
Cat Genetics / Coat Color Calculator
See the likely coat color and pattern outcomes from a breeding pair, based on feline coat color genetics. Free, fun, instant results.
Dog Worth / Value Estimator
A fun estimate based on breed, pedigree status, age, and training — for curiosity, not appraisal or insurance purposes. Free, instant results.
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Insights
Vet-written guides, owner deep-dives, and the science behind every calculator.
Where Calculator Estimates Undershoot Reality
I logged every dog expense for a year. Here is where the math is off.
Frenchies and Exercise: The Brachycephalic Balance
How much walking is too much — and the signs to watch for.
Raw Diets: What the Evidence Says
Three peer-reviewed reviews, no marketing, no zealotry.
Built differently from the start
Free to use, vet-reviewed, and privacy-focused.
Veterinarian approved
Every formula is reviewed by our 12-vet board, with names, credentials, and disclosures.
Privacy-first
Calculations run in your browser. Your pet's data never leaves your device — unless you sign in to save.
Location-specific
Costs and recommendations adjusted for your US state or EU country. No generic averages.
Breed-specific
Personalized results based on 100+ dog breeds and 50+ cat breeds, calibrated to each.