Pet Care Calculators
24 calculators
Feeding amounts, habitat sizing and life-stage estimates for cats, dogs, fish and small animals: tank volume, cage dimensions, portion sizes, litter and gestation timelines. Starting points come from common husbandry guidance; breed, activity level and body condition shift them. Anything that looks like illness is a vet question, not a calculator question.
- Aquarium Calculator Estimate aquarium water volume from inside dimensions and user-selected fill and water-change percentages.
- Bird Cage Size Calculator Estimate minimum dimensions for a single bird cage using measured wingspan and time outside the cage.
- Cat Food Calculator Estimate a cat’s daily calories and grams of food using the energy density on its package.
- Cat Litter Calculator Calculate how much cat litter you need and how often to change it.
- Cat Pregnancy Calculator Estimate a cat’s due-date range from a mating date and gestation length.
- Dog Breed Size Calculator Look up the typical adult height, weight and lifespan for a range of dog breeds.
- Dog Calorie Calculator Estimate a dog’s daily calorie needs from weight, life stage and activity.
- Dog Chocolate Toxicity Calculator Estimate methylxanthine exposure after a dog eats chocolate; contact a veterinarian promptly.
- Dog Food Calculator Calculate how much dry or wet food to feed a dog each day by weight and measuring cup.
- Dog Pregnancy Calculator Choose the actual date basis. First mating uses an illustrative 65-day midpoint within a broad 58–72-day window; ovulation uses 63 days with a 62–64-day window; LH surge / initial progesterone rise uses 65 days with 64–66.
- Dog Treat Calorie Calculator Estimate a daily dog treat-calorie budget capped at 10% of the calorie target.
- Dog Walking Calories Calculator See how many calories your dog burns on a walk and how many you burn too.
- Fish Tank Size Calculator Rough tank-volume estimates from a simplified fish-length model; check species-specific care needs.
- Fish Stocking Reference Calculator Compare adult fish length with a general freshwater surface-area reference; it is not a safe stocking limit.
- Hamster Cage Size Calculator Calculate the minimum floor area and enrichment a hamster needs by species.
- Horse Age Calculator — Rough Human-Age Analogy See an illustrative human-age analogy and broad life-stage label for a horse age.
- Pet Age Calculator Convert a pet age into the equivalent human age and see which life stage it is in.
- Pet Calorie Calculator Work out the daily calorie needs of a dog or cat from its weight and activity.
- Pet Cost Calculator Estimate the first-year and lifetime cost of owning a dog, cat or other pet.
- Puppy Weight Calculator — Adult Weight Scenario This is an explicit weight scenario: adult weight = current weight ÷ your assumed fraction already grown. The initial 50% is illustrative and is not inferred from age, breed size or a growth chart.
- Rabbit Age Calculator Convert a rabbit age into human years and see which life stage it is in.
- Rabbit Enclosure Space Calculator Estimate an RSPCA UK reference enclosure area for a pair or group of rabbits.
- Reptile Tank Temperature Calculator View approximate species-specific reptile temperature and humidity ranges in °F.
- Turtle Tank Size Calculator Calculate the tank size an aquatic turtle needs from its shell length.
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Pet calculators use different inputs for different animals and tasks. An age comparison is an illustrative model, a feeding estimate uses assumptions about the animal and food, and a tank calculation begins with dimensions. Choose the relevant species and read the tool’s basis before using a result.
Organize food and cost estimates
Separate a calorie estimate from a food-weight calculation: the food’s energy density is needed to connect them. Cost tools answer a budgeting question instead of a feeding question, and treat amounts and frequencies as scenario inputs.
Compare age models and habitat dimensions
Age tools apply different species assumptions. Aquarium volume is a geometric quantity, whereas stocking and habitat tools add biological or husbandry assumptions. Equal water volume does not make every enclosure or species arrangement equivalent.
Do not delay veterinary help for a calculation
These estimates cannot assess an individual animal’s health or an urgent exposure. For suspected poisoning or an unwell animal, contact a veterinarian or an appropriate animal poison service; a calculator cannot establish that an exposure is safe.