Pets
Pet care math: how much to feed, how much water, how old your dog is in human years, and pregnancy timelines.
54 free tools in this category. See every tool on Lelifi.
- Aquarium Glass Thickness CalculatorEstimate side and bottom glass thickness from water depth and tank length, compa
- Aquarium Heater Size CalculatorFind the right aquarium heater wattage. Enter tank size, target and room tempera
- Aquarium Salt CalculatorWork out how much aquarium salt to add to a freshwater tank. Pick the dose, ente
- Aquarium Tank Weight CalculatorAdd up the real weight of a fish tank: water at 8.34 lb a gallon, glass, sand an
- Aquarium Volume CalculatorConvert tank dimensions in inches to gallons, then subtract substrate, rock and
- Aquarium Water Change CalculatorFind the right aquarium water change. Enter your nitrate reading and tank size,
- Benadryl for Dogs Dosage CalculatorBenadryl for dogs dosage chart: enter your dog's weight to see diphenhydramine d
- Bird Age CalculatorCalculate your pet bird's age in human years across budgies, cockatiels, conures
- Cat Age CalculatorEnter your cat's birthday to get the exact age in years, months and days, the hu
- Cat BMI CalculatorScore your cat on the 9-point body condition scale to see its ideal weight, the
- Cat Calorie CalculatorHow many calories does your cat need each day. Enter weight and life stage for k
- Cat Feeding CalculatorEnter your cat's weight and life stage to get daily calories, cups of dry food,
- Cat Food CalculatorEnter your cat's weight and food to see daily calories, cups of dry food or cans
- Cat Life Stages CalculatorEnter your cat's age to get its life stage, human-age equivalent and what change
- Cat Litter CalculatorWork out how many litter boxes your cats need, how many pounds of litter to buy
- Cat Medication Safety CheckerCheck how much of a human pain reliever a cat swallowed in mg per kg, and see wh
- Cat Pregnancy CalculatorEstimate your cat's kittening due date from the breeding date. See the 60 to 67
- Cat Quality of Life CalculatorScore your cat on the seven HHHHHMM categories, see the total out of 70, and com
- Cat Years to Human Years CalculatorConvert cat years to human years with the standard formula, 15 for the first yea
- Dog Age CalculatorConvert dog years to human years by size: 15 in year one, 24 by year two, then 4
- Dog Ate Raisins: Toxicity Risk CalculatorEstimate the raisin dose per kilogram for your dog's weight, see why there is no
- Dog BMI and Body Condition CalculatorEnter your dog's weight and body condition score to get its ideal weight, the po
- Dog Boarding Cost CalculatorEstimate dog boarding cost by nights, nightly rate, number of dogs and add-ons,
- Dog Calorie CalculatorFree dog calorie calculator: enter your dog's weight, age and activity level to
- Dog Crate Size CalculatorFree dog crate size calculator: measure your dog's length, height and width and
- Dog Food CalculatorWork out how many cups to feed your dog from its weight, life stage and the bag'
- Dog Harness Size Guide and CalculatorDog harness size guide: measure chest girth and neck instead of guessing by weig
- Dog Heat Cycle CalculatorFind the next heat cycle and fertile window. Enter the last heat start date and
- Dog Life Expectancy CalculatorEnter your dog's weight and age to see the typical lifespan range for its size b
- Dog Medicine Dosage CalculatorEstimate a dog medicine dose by weight for Benadryl, Pepcid and Dramamine, with
- Dog Pregnancy CalculatorEnter the breeding date to estimate your dog's whelping due date, the 58-68 day
- Dog Treat CalculatorWork out how many treats your dog can have in a day. Pick a treat, enter weight,
- Dog Walking Calories CalculatorSee how many calories you burn walking your dog. Enter your weight, walk length
- Dog Water Intake CalculatorFree dog water intake calculator: enter your dog's weight, activity and weather
- Dog Years to Human Years: Size and Breed Age CalculatorCalculate your dog's true physiological age in human years using modern veterina
- First Time Dog Owner Cost CalculatorBudget your first dog: see the 3,221 dollar first year, the 1,200 to 2,000 dolla
- Fish Tank Size CalculatorCalculate fish tank size in gallons and litres from inches: rim capacity, real w
- Fish Tank Stocking CalculatorFind out how many fish your tank can hold. Enter the tank size, filtration and f
- Flea and Tick Treatment Cost CalculatorFlea and tick treatment cost calculator: pick a product, pet size and number of
- Guinea Pig Age CalculatorConvert your pet guinea pig's age into human years using a veterinary life stage
- Horse Gestation CalculatorEnter a breeding date to see the average foaling date at 340 days plus the full
- How Big Will My Puppy Get?Enter your puppy's weight and age to estimate adult weight from AKC growth-chart
- How Much Chocolate Is Toxic to Dogs?Enter your dog's weight and the chocolate eaten to estimate the dose per pound a
- Litter Box Size CalculatorFind the smallest litter box your cat should have and how many boxes you need. E
- Most Intelligent Dog Breeds and Working Intelligence GuideCompare canine intelligence rankings across six working tiers. Discover learning
- Omega-3 for DogsDose fish oil by EPA and DHA content, not capsule size: enter your dog's weight
- Pet Age CalculatorConvert your dog or cat age to human years. Pick the species, age and size to se
- Pet Medication Dosage CalculatorTurn a vet's mg/kg dose into milligrams, tablets or milliliters for a dog or cat
- Pet Sitter RatesSee what pet sitters charge: national averages of $21.80 per drop-in and $55.45
- Puppy Feeding CalculatorWork out how many cups a puppy needs a day from its age, current weight and expe
- Puppy Weight CalculatorEnter the age in months, current weight and expected adult weight to see the wei
- Puppy Weight ChartEstimate how big your puppy will get: enter its age and weight, pick the breed s
- Rabbit Cage Size CalculatorEnter your rabbit's adult weight to get the minimum cage length, floor area, and
- Spay or Neuter a Cat: Age, Cost and RecoveryWhen to spay or neuter your cat, what the surgery costs from 50 to 500 dollars,
Pet care comes down to numbers more often than people expect: how much food, how much water, how big a crate, how old in human years. Getting them roughly right keeps a dog or cat healthy, and getting the medicine dose wrong is the one that can do real harm.
Food, water and size
A dog's calorie need starts with resting energy, which is 70 times its weight in kilograms raised to the power of 0.75. A 40-pound neutered adult that walks twice a day lands near 985 calories a day, which at 350 calories per cup is about 2.8 cups split into two meals. A 12-pound puppy at three months needs far more per pound, about 748 calories, served in three or four small meals. Water runs roughly an ounce per pound of body weight, more in heat or after heavy activity.
- Human years: a cat's first year counts as about 15 human years, the second brings it to 24, and each year after adds about 4.
- Crate size: measure your dog's length and height and add a few inches, so it can stand and turn around.
- Litter boxes: one box per cat plus one, each about 1.5 times the cat's body length.
- Pregnancy: a dog's due date falls about 63 days after breeding, within a 58 to 68 day window.
Medicine is the danger zone
Doses of Benadryl, Pepcid and Dramamine scale by weight, and these pages give reference estimates only. Acetaminophen, ibuprofen, naproxen, decongestants and the sweetener xylitol are toxic to dogs at human doses, so never guess with a medicine your vet has not cleared.