Vet-sourced formulas, zero guesswork

Finally, pet calculators
you can trust.

Science-backed tools for feeding, health, and care. Built on peer-reviewed veterinary research — not marketing guesses.

Happy golden retriever in a sunny field
2 cups + 3 tbsp daily
Based on your dog's needs
📐Veterinary formulas (RER/MER)
📚Peer-reviewed sources
🐕200+ breeds supported
🔬WSAVA & NRC guidelines
Our Calculators

Every tool your pet needs

Science-backed calculators for dogs, cats, and aquariums. Plain-language results you can actually use.

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Dog Food Calculator

Enter your specific brand + dog details. Get one clear answer in cups and tablespoons.

Brand-specific500+ foods
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Puppy Growth Predictor

Breed-specific growth curves from 50,000 dogs — not simplistic linear formulas.

Waltham dataRange predictions
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Chocolate Toxicity

Your dog ate chocolate? Enter the type and amount — know instantly if it's an emergency.

Emergency toolASPCA data
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Dog Age Calculator

The real science of dog aging — epigenetic research, not the "multiply by 7" myth.

2020 UCSD studySize-adjusted
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Hot Pavement Checker

Is it too hot to walk? Enter the air temp and surface type — get a clear YES or NO.

Summer essentialBurn data
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Dog Pregnancy Calculator

Track your dog's 63-day pregnancy week by week. Enter the mating date — get the due date, current stage, and a vet-backed timeline.

Week-by-weekWhelping checklist
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Food Safety Checker

Can my dog eat this? Search 50+ common foods — instant safety ratings sourced from ASPCA toxicology data.

Dogs & Cats50+ foods
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Cat Calorie Calculator

NRC-based feline formula. Indoor, outdoor, neutered — precise calories for your cat.

NRC formula61% cats overweight
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Cat Age Calculator

Convert cat years to human years using the AAFP veterinary formula — not the multiply-by-7 myth.

AAFP formula6 life stages
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Aquarium Stocking

Bioload + behaviour + compatibility. Not the broken "inch per gallon" rule.

AqAdvisor killerCompatibility matrix
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Raw Feeding Planner

Pick your proteins, get a recipe in kitchen units. PMR or BARF — with Ca:P balance check.

Meal plan outputNRC balanced
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Insurance Estimator

How much will pet insurance cost for your breed, age, and coverage level?

NAPHIA data2026 rates
Orange tabby cat relaxing
Two dogs running on beach
Colourful tropical fish in aquarium
Golden retriever puppy
Cat looking through window
Dog sitting in park
Orange tabby cat relaxing
Two dogs running on beach
Colourful tropical fish in aquarium
Golden retriever puppy
Cat looking through window
Dog sitting in park
Why MyPetCalc

Built different from the rest

Every competitor is ad-infested, inaccurate, or both. We took a different approach.

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Peer-reviewed sources

Every formula sourced from WSAVA, NRC, AAFCO, or published veterinary research. We cite our sources on every page.

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Plain-language results

"2 cups + 3 tablespoons" — not "2.19 cups." Results you can act on without reaching for a calculator.

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Mobile-first design

Built for the phone in your hand. Fast, clean, no pop-ups blocking the result you came for.

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Brand-specific answers

500+ pet food products with exact calorie densities. Enter YOUR food — get YOUR answer.

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Breed-aware

200+ breeds with specific data. A Great Dane is not a Chihuahua — our tools know the difference.

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No dark patterns

No email gates. No "sign up to see results." No bait-and-switch. The calculator works — for free, immediately.

Mediavine Ad Slot — 728x90 Leaderboard (reserved space, no CLS)

Stop guessing. Start knowing.

21 science-backed calculators for dogs, cats, and aquariums. Free. No sign-up. No nonsense.

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