How Much to Feed Your Cat by Weight
A complete, vet-reviewed feeding guide with exact calorie and portion amounts by weight and life stage — plus how to adjust for wet food, dry food, and mixed diets.
Feeding the right amount is one of the most impactful things you can do for your cat's long-term health. Overfeeding causes obesity, which significantly increases the risk of diabetes, joint disease, and a shorter lifespan. Underfeeding — especially in kittens and seniors — causes muscle loss, immune deficiency, and developmental problems. The challenge: portion amounts on cat food packaging are typically generous estimates, not precise recommendations. This guide gives you the tools to calculate the right amount for your specific cat.
The Key Principle: Feed to Ideal Body Weight, Not Appetite
Cats are not good at self-regulating food intake when food is freely available — especially indoor, neutered cats with low activity levels. Free feeding (leaving food out all day) almost always leads to obesity over time. Structured meals (2–3 times daily with measured portions) is the gold standard for feline weight management. Always base portions on your cat's ideal body weight — not their current weight if overweight.
Daily Calorie Needs by Weight
These are approximate daily calorie (kcal) requirements for healthy, neutered adult indoor cats with low-to-moderate activity. Adjust using the multipliers below for your cat's specific situation.
| Weight | Daily kcal | Example |
|---|---|---|
| 2 kg (4.4 lbs) | 100 – 130 kcal | Small adult cat, some Asian breeds |
| 3 kg (6.6 lbs) | 140 – 175 kcal | Small adult cat, female domestic shorthair |
| 4 kg (8.8 lbs) | 175 – 215 kcal | Average adult cat, most domestic breeds |
| 5 kg (11 lbs) | 210 – 255 kcal | Larger adult cat, neutered male |
| 6 kg (13.2 lbs) | 240 – 290 kcal | Large cat, Maine Coon female, large male |
| 7 kg (15.4 lbs) | 270 – 325 kcal | Maine Coon, Ragdoll, large breeds |
| 8 kg (17.6 lbs) | 300 – 355 kcal | Large male Maine Coon or Ragdoll |
| 9 kg (19.8 lbs) | 325 – 385 kcal | Very large male, intact or large breed |
⚠ These ranges assume a healthy neutered indoor cat with moderate activity. Outdoor cats, intact cats, and highly active cats need 20–40% more. Overweight cats should be fed based on their target ideal weight to create a calorie deficit.
Life Stage & Activity Multipliers
Multiply the base calorie figure by the appropriate factor for your cat:
Wet Food Feeding Amounts
Most wet foods provide 70–100 kcal per 100g (due to 75–80% water content). Always check the specific kcal density on your brand's packaging or website — it varies significantly.
| Cat weight | Grams/day | Approx. pouches |
|---|---|---|
| 2 kg | 100 – 185 g | ~1 standard pouch (85g) |
| 3 kg | 140 – 250 g | 1.5 – 2 pouches |
| 4 kg | 175 – 310 g | 2 – 2.5 pouches |
| 5 kg | 210 – 365 g | 2.5 – 3 pouches |
| 6 kg | 240 – 415 g | 3 – 3.5 pouches |
| 7 kg | 270 – 465 g | 3 – 4 pouches |
| 8 kg | 300 – 510 g | 3.5 – 4.5 pouches |
⚠ Standard pouches vary between brands (typically 85–100g). A 'pouch' here refers to an 85g standard pouch at approximately 80 kcal per pouch. Always calculate based on the specific kcal content of your food, not pouch count alone.
Dry Food (Kibble) Feeding Amounts
Most adult cat dry foods provide 330–400 kcal per 100g. Higher-protein, grain-free foods tend to be more calorie-dense. Always weigh with a kitchen scale — measuring cups are inaccurate by 20–30%.
| Cat weight | Grams/day | Approx. cups |
|---|---|---|
| 2 kg | 28 – 40 g | ¼ cup or less |
| 3 kg | 38 – 53 g | ¼ – ⅓ cup |
| 4 kg | 47 – 65 g | ⅓ – ½ cup |
| 5 kg | 55 – 77 g | ½ cup |
| 6 kg | 63 – 88 g | ½ – ⅔ cup |
| 7 kg | 70 – 98 g | ⅔ cup |
| 8 kg | 77 – 108 g | ⅔ – ¾ cup |
⚠ These amounts are calculated for dry food at approximately 350 kcal/100g. Always verify your specific food's calorie density. Cats on dry-only diets consume significantly less water than those on wet food — provide a cat water fountain to support kidney health.
Mixed Wet + Dry Diet
Many cat owners use a combination of wet and dry food — this is a practical approach that balances convenience, cost, and hydration. To calculate portions for a mixed diet: decide what percentage of calories will come from each type (e.g., 50% wet, 50% dry). Calculate the total daily calories your cat needs. Calculate wet food grams for 50% of those calories. Calculate dry food grams for the remaining 50%. Example for a 4 kg cat needing 200 kcal/day: 100 kcal from wet food = approximately 125–140g wet food. 100 kcal from dry food = approximately 28–30g dry food.
Kitten Feeding Guide
Kittens have dramatically higher calorie needs per kg of body weight than adults. They need energy for rapid growth, immune development, and organ maturation. Always feed a food specifically formulated for kittens or 'all life stages.'
Transitioning from mother's milk — offer wet kitten food freely. Calorie needs are extremely high per gram of body weight.
Approximately 200 kcal/kg of body weight/day. A 0.5 kg kitten needs ~100 kcal/day; a 1 kg kitten needs ~200 kcal/day.
Approximately 150–200 kcal/kg of body weight/day. Growth rate is rapid — monitor weight weekly.
Reduce to approximately 80–100 kcal/kg of body weight/day as growth slows. Transition to adult food at 12 months (or 18 months for large breeds like Maine Coon).
⚠ Never restrict kitten food based on body condition — kittens need generous nutrition for brain and organ development. Only restrict if a kitten is genuinely obese (rare before 6 months). Monitor growth rate rather than calorie-restricting.
How Often to Feed Your Cat
Small stomach capacity, high energy needs, blood sugar stability
Growth slowing, transitioning toward adult schedule
Mimics natural hunting rhythm, maintains metabolic efficiency, easier weight management
Easier digestion, maintains appetite in cats with reduced smell or dental issues
Small frequent meals maintain calorie intake when appetite is reduced
Check Your Cat's Body Condition Score
Upload a photo of your cat for an instant AI body condition score — the most reliable way to know if your current feeding amount is right. Track changes month to month.
Scan your pet nowHow to Adjust Portions
Weigh monthly, not just check visually
Cats' coats conceal weight changes. Use a kitchen scale — weigh yourself holding your cat, subtract your weight. Record results monthly and watch for trends rather than single measurements.
Body condition score every 4–6 weeks
Part the coat and run both hands firmly along the ribcage. Ribs should be felt with light pressure but not visible. No waist = overweight. Sharp ribs = underweight. Adjust portions by 10% in the appropriate direction and reassess in 4 weeks.
Adjust after neutering
Neutering reduces a cat's calorie needs by approximately 20–30%. Many owners continue pre-surgery feeding amounts and the cat gradually gains weight. Reduce portions by 20% at the time of neutering.
Don't count treats as extras
Treats count as calories. If your cat receives treats, reduce their meal portion by the equivalent calorie amount. Treats should not exceed 10% of total daily calorie intake.
Seasonal and activity adjustments
Indoor-only cats rarely need seasonal adjustments. Cats with outdoor access may need more in winter. Any change in activity level (illness, recovery, age-related mobility reduction) should prompt a portion review.
Frequently Asked Questions
How do I calculate exactly how much to feed my cat?▾
Step 1: Find your cat's ideal body weight (not current weight if overweight). Step 2: Use the calorie table above to find the base daily kcal for that weight. Step 3: Multiply by the appropriate life stage factor. Step 4: Check the kcal per 100g on your specific food packaging. Step 5: Divide daily kcal by the kcal density of your food to get daily grams. Step 6: Weigh the food on a kitchen scale — do not use cups.
My cat always seems hungry — am I underfeeding?▾
Not necessarily. Many cats beg for food regardless of how much they have eaten — this is a behavioral pattern, not a reliable indicator of hunger. The most reliable assessment is body condition score, not appetite behavior. If your cat has a BCS of 4–5 and is maintaining weight, they are receiving adequate nutrition. If your cat has a BCS below 4 (you can feel sharp ribs or see the spine), increase portions by 10% every 2 weeks until BCS improves.
Is it okay to leave dry food out all day for my cat?▾
For weight management, free feeding (leaving food out all day) is not recommended. Indoor neutered cats have low calorie needs and most will overeat if food is constantly available. Structured mealtimes (2× daily with measured portions) significantly reduces the risk of obesity. If your cat is underweight or a high-energy outdoor cat, free feeding dry food may be appropriate — but monitor BCS monthly.
How much wet food should I give my cat per day?▾
For an average 4 kg adult neutered indoor cat, approximately 175–220g of wet food per day (about 2–2.5 standard 85g pouches). This assumes wet food providing approximately 80–90 kcal per 100g. Always check the specific calorie content of your brand — it varies considerably. Divide the daily amount across 2–3 meals.
When should I switch from kitten to adult cat food?▾
For most cats: at 12 months of age. For large breeds (Maine Coon, Ragdoll, Norwegian Forest Cat): at 18 months, as they grow more slowly. Transition gradually over 7–10 days by mixing increasing proportions of adult food into the kitten food to avoid digestive upset.
This article is for educational purposes only. Always consult a licensed veterinarian for medical advice specific to your pet.