Pet Calculators
Aquarium Volume Calculator
Calculate an aquarium's exact water volume in gallons or liters from length, width, and height, for accurate stocking, filtration, and medication dosing.
Bird Cage Size Calculator
Find the minimum recommended enclosure size for a pet bird by species group, cross-checked against wingspan for full wing extension room.
Cat Food Calculator
Calculate a cat's daily food ration in cups and calories from weight and life stage, using cat-specific veterinary energy-requirement multipliers.
Cat Litter Box Size Calculator
Calculate the recommended litter box length based on your cat's body length, following veterinary behaviorist guidelines.
Dog Crate Size Calculator
Calculate the recommended crate length and height for your dog based on its body measurements.
Dog Food Calculator
Calculate a dog's daily food ration in cups and calories from weight, life stage, and activity level using standard veterinary energy-requirement formulas.
Dog Walking Calorie Calculator
Estimate the calories a dog burns on a walk from body weight, walk duration, and pace, using distance and pace-specific intensity factors.
Fish Stocking Calculator
Estimate safe fish stocking capacity for a tank using the classic inch-per-gallon guideline, based on tank volume and average adult fish length.
Flea & Tick Treatment Schedule Calculator
Calculate how many days remain until your pet's next flea and tick treatment is due, based on your treatment interval.
Hamster Cage Size Calculator
Find the minimum recommended cage floor space for Syrian, Dwarf, and Roborovski hamsters based on modern welfare guidelines.
Litter Box Count Calculator
Calculate the recommended number of litter boxes for a multi-cat household using the veterinary-recommended N+1 rule.
Pet Age Calculator
Convert a dog or cat's age into human-equivalent years using the size-adjusted veterinary aging formula, not the outdated multiply-by-seven rule of thumb.
Pet Boarding Cost Calculator
Calculate the total cost of a pet boarding stay including nightly rate and additional daily fees.
Pet Daily Water Intake Calculator
Calculate how much water your dog or cat should drink per day based on their body weight.
Pet Food Calculator
Calculate a dog or cat's daily food ration in cups using resting energy requirement, life-stage activity factor, and your specific food's calories per cup.
Pet Insurance Cost Calculator
Estimate monthly and annual pet insurance premiums from species, age, breed risk tier, coverage level, deductible, and reimbursement percentage.
Pet Weight Loss Calorie Target Calculator
Estimate a daily calorie target for a pet weight-loss plan using metabolic body weight scaling, a standard veterinary nutrition method.
Puppy Adult Weight Projection Calculator
Estimate a puppy's projected adult weight based on its current weight and age in weeks.
Rabbit Hutch Size Calculator
Calculate the minimum recommended hutch or enclosure floor area for your rabbits based on breed size and number of rabbits.
Reptile Tank Heating Calculator
Size an under-tank heat mat or overhead basking bulb for a reptile enclosure based on tank volume and the target basking-spot temperature.
Caring for Pets, With Actual Numbers
Pet care questions — how much to feed, what tank size a fish needs, how old a pet really is in human years — all have more precise answers than the usual rules of thumb suggest. These ten calculators cover feeding, habitat, and care math for common pets.
Dog Food Portions Scale With Weight, Not a Fixed Cup Count
| Dog Weight | Approximate Daily Amount |
|---|---|
| 10 lbs | ~0.75 cup |
| 30 lbs | ~1.5 - 2 cups |
| 70 lbs | ~3 - 4 cups |
These are general starting points, not a substitute for the specific food's label (calorie density varies significantly between brands) or a veterinarian's guidance for a particular dog's activity level and health needs. Start with the Dog Food Calculator and adjust from there.
Popular Pet Calculators
- Pet Age Calculator — converts a pet's age into human-equivalent years using species and size-adjusted formulas rather than a flat "multiply by 7."
- Aquarium Volume Calculator — calculates tank volume from dimensions for stocking and equipment planning.
- Fish Stocking Calculator — estimates safe fish stocking levels for a given tank volume and species.
Related: Veterinary Calculators for clinical-specific pet health math.