Aquarium Heater Size Calculator
Calculate aquarium heater wattage by tank size and temperature needs. Watts per gallon guideline with room temp adjustment.
Aquarium Stocking Calculator
Calculate how many fish your aquarium can hold. Stocking levels by tank gallons, fish size, and filtration. Free aquarium capacity calculator.
Aquarium Volume Calculator
Calculate aquarium volume from tank dimensions. Gallons and liters for rectangular, bowfront, and cylindrical tanks.
Bird Cage Size Calculator
Calculate bird cage size by species. Minimum dimensions, bar spacing, and accessories. Free bird cage sizing calculator.
Cat Age Calculator (Human Years)
Convert cat age to human years. Indoor vs outdoor aging rates. See your cat's life stage and expected lifespan.
Cat Calorie Calculator
Calculate daily calories for your cat by weight and activity. Indoor vs outdoor. Free cat calorie calculator.
Cat Cost Calculator
Calculate annual and lifetime cost of cat ownership. Food, litter, vet bills, and supplies. Indoor vs outdoor, kitten vs adult.
Cat Food Calculator
Calculate daily cat food portions. Wet food, dry food, or mixed — by weight, age, and indoor/outdoor activity. Free cat feeding calculator.
Dog Age Calculator (Human Years)
Convert dog years to human years using the modern breed-adjusted formula. Small, medium, large, and giant breeds age differently.
Dog Age in Human Years Calculator
Convert dog age to human years. Updated scientific formula by breed size. Free dog age calculator.
Dog Bed Size Calculator
Calculate dog bed size by breed, measurements, and sleeping style. Bolster, flat, orthopedic recommendations.
Dog Collar Size Calculator
Calculate the right dog collar size by breed or neck measurement. Width, material, and fit recommendations.
Dog Crate Size Calculator
Calculate the right dog crate size by breed or measurements. Length, width, and height recommendations. Free crate sizing guide.
Dog Exercise Needs Calculator
Calculate daily dog exercise needs by breed and age. Walk duration, off-leash play, and mental stimulation recommendations.
Dog Food Calculator
Calculate daily dog food portions by weight, age, and activity. Cups of kibble, raw food weight, and calorie targets. Free dog feeding calculator.
Dog Harness Size Calculator
Calculate dog harness size by chest girth. Front-clip, back-clip, and no-pull harness recommendations by breed size.
Dog Life Expectancy Calculator
Estimate dog lifespan by breed size, weight, and health factors. Based on veterinary actuarial data. Free dog life expectancy calculator.
Dog Pregnancy Calculator
Calculate dog pregnancy due date from breeding date. Week-by-week pregnancy timeline and whelping preparation. Free canine gestation calculator.
Fish Tank Volume Calculator
Calculate aquarium volume and fish stocking capacity. Filter sizing included. Free fish tank calculator.
Horse Weight Calculator
Estimate horse weight from body measurements. Heart girth and length tape method. Free calculator.
Pet Adoption Cost Calculator
Calculate total first-year pet adoption costs. Adoption fee, initial vet visit, supplies, food, and ongoing monthly expenses. Dog and cat.
Pet Food Cost Calculator
Calculate monthly and annual pet food costs. Compare budget, mid-range, and premium brands for dogs and cats. Free pet food cost calculator.
Pet Insurance Calculator
Calculate whether pet insurance is worth it for your pet. Compare premiums vs expected vet costs by breed and age. Break-even analysis.
Pet Sitting & Boarding Cost Calculator
Calculate pet sitting and boarding costs. Compare kennel boarding, in-home pet sitting, dog daycare, and dog walkers by duration.
Pet Weight Loss Calculator
Calculate a safe pet weight loss plan. Daily calories, food reduction, and timeline for dogs and cats. Veterinarian-recommended approach.
Puppy Growth & Weight Predictor
Predict adult dog size from puppy weight. Growth curve by breed size — toy, small, medium, large, and giant breeds.
Reptile Enclosure Size Calculator
Calculate reptile enclosure size by species. Minimum dimensions, heating, lighting, and humidity requirements.
Vet Visit Cost Estimator
Estimate vet visit costs by procedure type. Routine exams, vaccines, dental cleaning, spay/neuter, and emergency care. Free vet cost estimator.
Better Care Through Better Numbers
Proper pet care depends on accurate information. Feeding too much leads to obesity (affecting 60% of US cats and 56% of dogs). Under-dosing medication is ineffective. An undersized fish tank stresses fish and shortens their lives. These calculators help you get the numbers right — whether it's how many calories your cat needs, what your dog's age means in human years, or how much water your aquarium holds.
Calculators for Every Pet Owner
Dog owners use our Dog Age Calculator and Dog Food Calculator most frequently. Cat owners rely on the Cat Calorie Calculator and Cat Age Calculator. Fish keepers use the Fish Tank Volume Calculator for chemical dosing and stocking levels. Horse owners use the Horse Weight Calculator for feed and dewormer dosing. Every formula is sourced from veterinary references and animal nutrition research.
Frequently Asked Questions
How many calories should my pet eat?▾
It depends on species, weight, age, and activity level. Dogs: 25-30 calories per pound of body weight for average adults. Cats: 20-25 calories per pound. Use our species-specific calculators for personalized recommendations — they account for age, activity, and body condition.
How accurate is the dog age calculator?▾
Our calculator uses the updated scientific formula (not the old 7x rule). Dogs age rapidly in their first two years (1 dog year ≈ 15 human years), then approximately 4-6 human years per dog year depending on size. Small dogs age slower and live longer than large breeds. The formula is based on 2019 DNA methylation research.