Daily Cat Calorie Calculator
Use this calculator to estimate how many calories your cat needs each day. Results are a starting point for healthy feeding and should be adjusted with your veterinarian.
Tip: If you are planning weight loss, enter a realistic target weight and choose “Weight loss.”
How many calories should a cat eat per day?
There is no one-size-fits-all answer. A cat’s calorie needs depend on body weight, age, activity level, reproductive status, and health goals. A young kitten may need several times more calories per pound than a sedentary adult cat, while a senior cat may require fewer calories to avoid unhealthy weight gain.
This page uses a common veterinary method to estimate calorie needs:
- RER (Resting Energy Requirement) = 70 × (body weight in kg)0.75
- MER (Maintenance Energy Requirement) = RER × life-stage and lifestyle factors
The calculator then adjusts the estimate using activity and feeding goals (maintain, lose, or gain).
How this cat calorie calculator works
1) It calculates metabolic baseline
RER estimates the calories your cat needs at rest for basic body functions (breathing, circulation, organ function, and temperature regulation).
2) It applies life-stage multipliers
Energy needs vary by age and condition. For example, kittens and lactating cats generally need much more energy than neutered adults.
3) It adjusts for lifestyle and goals
Indoor low-activity cats often need fewer calories. Cats on a supervised weight-loss plan usually need a controlled calorie target based on ideal or target weight.
Typical calorie ranges (general guidance)
These are broad estimates for healthy adult cats and should not replace individualized veterinary advice:
- Small adult cat (6–8 lb): roughly 160–220 kcal/day
- Average adult cat (8–10 lb): roughly 180–260 kcal/day
- Larger adult cat (10–12 lb): roughly 220–320 kcal/day
Many indoor neutered cats do best on the lower end of these ranges. Always monitor body condition and adjust gradually.
How to use your result in real feeding plans
Convert calories into portions
Pet food labels list calories as kcal per cup, can, pouch, or kilogram. Enter that value into the calculator to estimate servings per day. Then split the daily total into 2–4 meals.
Dry food vs wet food
Dry kibble is calorie-dense, so small volume changes can significantly increase calorie intake. Wet food often has lower calorie density and can help with hydration and satiety. Either can work if calories are controlled consistently.
Treat calories count too
Treats should ideally remain under 10% of daily calories. If treats increase, regular meal portions should decrease to prevent weight gain.
Safe weight loss for cats
Weight loss in cats should be gradual and monitored. Rapid calorie restriction can be dangerous and may increase risk of hepatic lipidosis (fatty liver disease), especially in overweight cats.
- Aim for slow, steady progress (often around 0.5% to 2% body weight per week under veterinary guidance).
- Use measured portions (kitchen scale or measuring cups/cans).
- Recheck body weight regularly (every 2–4 weeks).
- Adjust calories in small steps rather than making sudden large cuts.
Body condition matters more than scale weight alone
Two cats at the same weight can have very different body composition. Use a body condition score (BCS) system along with weight trends. Your veterinarian can help determine your cat’s ideal weight and safe calorie target.
When to consult your veterinarian
You should get professional guidance if your cat is very young, elderly, pregnant, lactating, diabetic, has kidney disease, thyroid disease, GI symptoms, unexplained weight change, or poor appetite. Medical conditions can significantly change calorie and nutrient requirements.
Frequently asked questions
Is this calculator exact?
No. It provides an evidence-based estimate. Individual cats can vary, so use results as a starting point and adjust based on weight trend and body condition.
How often should I recalculate?
Recalculate when weight changes, activity changes, life stage changes, or food type changes. Monthly check-ins are a practical habit for many owners.
Can I use this for kittens?
Yes, but kittens grow quickly and need frequent reassessment. Work closely with your veterinarian to support healthy growth.
Educational use only. This calculator does not diagnose, treat, or replace veterinary care.