Keeping track of your pet's health and milestones is much easier with the right numbers. This collection includes the Dog Age Calculator for understanding your pup's life stage, the Dog Pregnancy Calculator for tracking canine gestation, the Rabbit Gestation Calculator and Llama Gestation Calculator for livestock owners, and the Dog BMI Calculator to help assess your dog's body condition at a glance.
Check the Popular list to see which tools other pet owners rely on most, or browse the Trending tab for newer additions. Every calculator is free, needs no sign-up, and works on any phone, tablet, or computer — always within reach when you need a quick answer.
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Dog Pregnancy Calorie CalculatorPredict your puppy's adult weight from its current weight, age in weeks and breed size. Free estimator for small, medium and large dogs.
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Dog Blood Pressure CalculatorCalculate a dog's body surface area (BSA) in square meters from body weight using the standard 10.1 × weight^(2/3) veterinary formula.
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Dog Flea Treatment Cost CalculatorEstimate the yearly cost of owning a pet. Add monthly food, treats, vet, grooming, supplies and insurance to see your true annual pet budget.
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Dog Calories per Cup to Cups per Day CalculatorConvert your dog's daily calorie needs (MER in kcal) to cups of food per day using the kcal-per-cup density on the bag. Free, instant feeding portion tool.
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Cat Calories per Can to Cans per Day CalculatorCalculate how many cans of wet food your cat needs per day. Enter daily calorie needs and kcal per can to get cans per day and per week.
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Gestation CalculatorEstimate the due date by adding a gestation period (in days) to the conception date. Works for humans and animals with custom gestation lengths.
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Dog Raisin Toxicity CalculatorEstimate your dog's grape or raisin toxicity risk from amount eaten and body weight. Uses conservative toxic-dose thresholds. Not a substitute for a vet.
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Dog Pregnancy Week CalculatorFind out what week of pregnancy your dog is in. Enter the breeding date and today's date to track gestation stage out of 9 weeks (≈63 days).
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Dog Age in Human Years CalculatorConvert your dog's age into human years using the science-based logarithmic formula (16·ln(age)+31), with a linear puppy approximation under 1 year.
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Dog Crate Size CalculatorFind the right crate size for your dog. Enter your dog's length and standing height to get the recommended minimum crate length and height in inches.
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Cat Acetaminophen (Tylenol) Toxicity CalculatorEstimate the acetaminophen (Tylenol) dose your cat ingested in mg/kg and compare it to the 10 mg/kg feline toxic threshold. Educational tool — call your vet.
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Puppy Vaccination Schedule CalculatorCalculate your puppy's vaccination schedule from its birth date. Get recommended dates for the 6, 9, 12, and 16-week core vaccine doses instantly.
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Gabapentin for Cats Dosage CalculatorEstimate a gabapentin dose for cats from body weight and mg/kg rate (5–20 mg/kg). Shows low and high range. Educational only — always confirm with your vet.
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Benadryl (Diphenhydramine) for Dogs Dosage CalculatorEstimate a Benadryl (diphenhydramine) dose for your dog using 1 mg/lb (~2.2 mg/kg), 2–3 times daily. Educational tool — confirm with your vet.
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Gabapentin for Dogs Dosage CalculatorEstimate the gabapentin dose range for your dog by weight (kg or lb) using 5–10 mg/kg every 8–12 hours. Educational tool — confirm with your vet.
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Chicken Feed CalculatorCalculate daily, weekly and monthly chicken feed for your flock. Estimate how much layer feed your hens need based on the number of birds.
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Amoxicillin for Dogs Dosage CalculatorEstimate amoxicillin dosage for dogs by weight. Uses 10 mg/kg every 12 hours (range 5–10 mg/kg). Vet confirmation required before dosing.
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Rimadyl (Carprofen) Dosage Calculator for DogsEstimate your dog's Rimadyl (carprofen) dose by body weight. Calculates total daily mg and per-dose mg at the standard 4.4 mg/kg/day rate.
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Metacam (Meloxicam) Dosage Calculator for DogsCalculate Metacam (meloxicam) dosage for dogs: 0.2 mg/kg loading dose on day 1 and 0.1 mg/kg daily maintenance, in mg and mL.
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Prednisone for Dogs Dosage CalculatorEstimate a dog's daily prednisone dose by weight for anti-inflammatory (0.5–1 mg/kg) or immunosuppressive (2–4 mg/kg) use. Vet confirmation required.
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Trazodone for Dogs Dosage CalculatorEstimate a trazodone dose range for your dog by weight (3.5–7 mg/kg) before stressful events. Educational tool — always confirm with your vet.
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Hydrogen Peroxide Dose for Dogs CalculatorCalculate the 3% hydrogen peroxide dose to induce vomiting in dogs by weight (1–2 mL/kg, max 45 mL). Always consult your vet first before using.
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Mare Gestation & Foaling Due Date CalculatorCalculate your mare's foaling due date from the breeding date. Estimates the foaling window using an average 340-day horse gestation period.
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Chicken Coop Size CalculatorCalculate how big your chicken coop and run should be. Enter the number of hens to get minimum square feet for coop floor and outdoor run.
Frequently asked questions
What pet care questions can these calculators answer?
The collection covers gestation periods for dogs, rabbits, sheep, swine, and llamas; canine body condition via Dog BMI; life-stage conversion with the Dog Age Calculator; and basic antibiotic dosing guidance for cephalexin in dogs. It is particularly well-rounded for dog owners and for those managing livestock reproduction.
How accurate are the pet care results?
Tools are based on published average gestation lengths and standard veterinary reference formulas. Results are general estimates — individual animals vary considerably. These calculators are NOT veterinary advice; always consult a qualified veterinarian before making health, reproductive, or medication decisions for your pet.
Is there a cost to use these tools?
No. Every calculator is free with no account required. Open any tool on any device and start entering your pet's details immediately — no barriers, no subscriptions.
Do you store my pet's information?
No. Every calculation happens entirely in your browser. No data about your pet — age, weight, breed, or due date — is transmitted to or stored by our servers. Your animal's details stay on your device.
Which pet care calculators are most popular?
The category list is sorted by actual usage, so the tools most pet owners reach for appear at the top. The Trending and Recently Added tabs let you discover newer tools that are gaining popularity among the pet-owner community.
