Pets Calculators
Educational dog and cat age charts, RER/MER calorie estimates, food portions, puppy growth projections, and ownership cost worksheets—transparent planning math with strong disclaimers, not veterinary advice, medication dosing, or toxicity tools.
Calculators
Professional tools with instant results
Dog Age Calculator
Convert your dog’s age into a size-based human-year equivalent using common educational aging charts—not a veterinary geriatric diagnosis.
Cat Age Calculator
Estimate a cat’s human-year equivalent with the common 15 / 9 / +4 educational chart—clear assumptions, not veterinary advice.
Dog Food Portion Calculator
Estimate daily dog food portions from weight, life-stage MER factor, and your food’s kcal per cup or can—educational RER/MER math, not a prescription diet.
Cat Food Portion Calculator
Estimate daily cat food portions from weight, life-stage factor, and label kcal density using educational RER/MER worksheets.
Puppy Growth Calculator
Project adult weight from current puppy weight and age using size-class growth-curve percentages—or reverse the curve for an expected weight at age.
Pet Cost Calculator
Add adoption/setup one-time costs to monthly pet expenses to estimate first-year total, annual recurring spend, and a multi-year planning horizon.
Dog Calorie Calculator
Estimate daily dog calorie needs with RER = 70×kg^0.75 and educational MER life-stage factors—planning math, not a medical diet order.
Cat Calorie Calculator
Estimate daily cat calorie needs with RER = 70×kg^0.75 and educational cat MER factors for neutered, intact, active, kitten, or weight-loss planning math.
Learn & Understand
In-depth guides and educational content
Pet Age in Human Years: What Dog and Cat Charts Actually Mean
Learn why year-1 and year-2 credits dominate pet aging charts, how size changes dog math, and why veterinarians use life stages instead of a single multiplier.
Pet Calories Explained: RER, MER, and Feeding Portions
See how resting energy requirement (RER) and maintenance energy requirement (MER) connect to cups and cans—educational nutrition math with clear limits.
Planning Pet Costs: One-Time Setup vs Monthly Care
Separate adoption and gear from food, preventives, insurance, and grooming so first-year and multi-year pet budgets stay honest.
Latest Articles
Expert insights and analysis
How Dog and Cat Age Charts Work
See how educational dog and cat age charts front-load human-year credits—and why the ×7 rule misleads.
Pets Calculators: What These Tools Are Not
What our Pets calculators are not: veterinary advice, medication dosing, or toxicity tools—educational math only.
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