Cat Food Calculator

How much should you feed your cat each day? Get portion guidance based on your cat's weight, age, activity level and whether they're indoor or outdoor.

Cat's weight (kg)

Life stage

Activity / lifestyle

Neutered / spayed?

Food type

🐟

Enter your cat's details to calculate their ideal daily food portion.

Make mealtimes healthier. Puzzle feeders slow eating (reducing vomiting) and provide mental stimulation — especially beneficial for indoor cats.

View Cat Feeders →

Related Calculators

How Cat Food Portions Are Calculated

Cat daily energy needs start from the Resting Energy Requirement: RER = 70 × weight^0.75 kcal/day. This is then multiplied by a life stage factor (kittens need ~2.5×, adults 1.2–1.6×, seniors ~1.1×). Indoor cats need approximately 20% fewer calories than outdoor cats due to lower activity levels. Neutered cats need 10–20% fewer calories than intact cats.

Obesity is the most common nutritional disease in cats — over 50% of UK cats are estimated to be overweight. Unlike dogs, cats should not be crash dieted — rapid weight loss causes hepatic lipidosis (fatty liver disease) which can be fatal. Reduce calories by maximum 20% and weigh monthly.

Both have pros and cons. Wet food has higher water content (70–80% vs 10% in dry) — important since cats have low thirst drive and urinary issues are common. Dry food is more calorie-dense, cheaper and better for dental health. Many vets recommend a combination — dry as the base with wet food for hydration and palatability. If your cat has urinary tract issues, wet or fresh food is strongly preferred.

Adults: 2 meals per day is ideal — cats are not natural grazers despite free-feeding being common. Kittens: 3–4 meals per day until 6 months. Senior cats: 2–3 small meals. Free-feeding (leaving food out all day) is a major contributor to feline obesity. Puzzle feeders and meal feeding improve weight management, reduce boredom and increase activity in indoor cats.