Dog Calculators
Pet Water Intake Calculator: How Much Should a Dog or Cat Drink?
Estimate a daily water-intake range for dogs and cats using body weight, diet, activity, weather, and common hydration flags.
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Pet Calculators for Everyday Dog, Cat & Aquarium Care
Explore free, fast, mobile-friendly calculators built for educational estimates across dog care, cat care, pet travel, and aquarium setup, with metric-first defaults for UK readers.
Metric first
Supported tools open with kilograms, grams, millilitres, and centimetres first, while still allowing pounds and cups where helpful.
Free and quick
Each tool is lightweight, browser-based, and built to load fast on mobile devices.
Educational by design
Results are framed as educational estimates with plain-language disclaimers and practical context.
Categories
Find the right calculator by topic
Start with one of the main pet care categories below, then move across related sections through internal links to find the next tool you need.
Dog Calculators
Feeding, hydration, growth, safety, and sizing tools for everyday dog care.
Explore also: Cat Calculators Pet Travel Aquarium Calculators
Dog Calculators
Dog Food Calculator: How Much to Feed Your Dog by Weight
Estimate a daily calorie range and dry food, wet food, or grams-per-day portion using your dog's weight, age, activity, body condition, and food label calories.
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Dog Calorie Calculator: Daily Calories by Weight & Activity
Estimate a dog's daily calorie needs using weight, life stage, and activity level.
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Puppy Feeding Calculator: How Much to Feed a Puppy by Age
Estimate puppy meals per day, calories, and portion guidance by age and expected size.
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How Much Water Should a Dog Drink a Day? Calculator
Estimate a healthy daily water intake range for dogs based on body weight and conditions.
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Dog Chocolate Toxicity Calculator: How Much Is Dangerous?
Estimate chocolate exposure by dog weight, chocolate type, amount eaten, time since ingestion, and symptoms, then organize the information your veterinarian will need.
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Dog Crate Size Calculator: What Size Crate Do I Need?
Estimate crate length, width, and height for dogs based on standing and body measurements.
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Dog Age Calculator: Dog Years to Human Years by Size
Convert dog years into estimated human years with size-aware life stage guidance.
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Puppy Growth Calculator: Predict Adult Weight & Size
Estimate future size and weight trends for puppies based on age, weight, and breed size class.
Open calculatorCat Calculators
Practical cat tools for feeding, hydration, litter planning, travel, and life-stage comparisons.
Explore also: Dog Calculators Pet Travel Aquarium Calculators
Cat Calculators
Cat Food Calculator: How Much to Feed (Wet, Dry & Mixed)
Estimate a daily calorie range and dry food, wet food, or mixed feeding portions based on cat weight, life stage, body condition, activity, and label calories.
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Cat Calorie Calculator: Daily Calories (kcal) by Weight
Estimate daily calorie needs for indoor, outdoor, adult, and senior cats.
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Kitten Feeding Calculator & Chart by Age and Weight
Estimate kitten meal frequency and food portions by age, weight, and growth stage.
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How Much Water Should a Cat Drink a Day? Calculator
Estimate a normal daily water intake range for cats using body weight and feeding style.
Open calculatorCat Calculators
Cat Litter Usage Calculator
Estimate how much cat litter you may use per week or month based on box count, cat count, and litter depth.
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Cat Age Calculator: Cat Years to Human Years
Convert cat years into estimated human years with a simple life-stage comparison.
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Cat Carrier Size Calculator: What Size Carrier Do I Need?
Estimate a practical carrier size for cats using body length, height, and travel style.
Open calculatorPet Travel
Travel planning tools for crate sizing, packing, and smoother trips with pets.
Explore also: Dog Calculators Cat Calculators Aquarium Calculators
Pet Travel
Pet Travel Crate Size Calculator (Airline & IATA Approved)
Estimate a travel crate size for dogs or cats based on body measurements and travel type.
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Pet Travel Checklist for Road Trips and Flights
Build a simple packing and prep checklist for pet trips based on travel type, duration, and pet species.
Open calculatorAquarium Calculators
Tank planning calculators for aquarium volume, stocking, and heater sizing.
Explore also: Dog Calculators Cat Calculators Pet Travel
Aquarium Calculators
Aquarium Stocking Calculator: How Many Fish in Your Tank
Estimate a conservative fish stocking level using tank size, filtration, and fish size assumptions.
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Aquarium & Fish Tank Volume Calculator (Litres & Gallons)
Calculate rectangular aquarium volume in US gallons and liters from tank dimensions.
Open calculatorAquarium Calculators
Aquarium Heater Size Calculator & Wattage Chart
Estimate aquarium heater wattage based on tank volume, room temperature, and target water temperature.
Open calculatorWhy PetCalc
Why use PetCalc?
PetCalc is built for quick answers without the clutter. The focus is simple: free tools, fast loading, mobile-friendly layouts, and educational estimates that stay easy to review.
Easy on mobile
Large tap targets, readable forms, and compact result blocks keep each calculator practical on smaller screens.
Built around intent
Each tool is grouped by real pet-owner tasks such as feeding, hydration, travel planning, litter budgeting, and aquarium setup.
UK-friendly defaults
Metric-first inputs reduce friction for local readers while still keeping familiar alternatives available where labels use them.
Important disclaimer
Educational estimates only
PetCalc calculators are educational estimates only. They help with planning, comparison, and everyday reference use.
They are not a substitute for veterinary advice, emergency guidance, poison-support services, or species-specific professional care.
FAQ
Common questions about PetCalc UK
What is PetCalc UK?
PetCalc UK is the UK English version of the PetCalc hub, with metric-first calculator defaults for dogs, cats, pet travel, and aquarium care.
Are the calculators still free to use?
Yes. The calculators are free to use in the browser and are designed to work quickly on mobile and desktop.
Do these calculators replace a vet?
No. PetCalc calculators are educational estimates only and should not replace a vet, poison resource, or other professional advice.
Do UK pages still allow pounds or cups?
Many UK pages start in metric mode but still support pounds, cups, cans, or gallons where those units are useful for the product or label you are using.