Free cat food calculator

How much should you feed your cat?

Enter your cat’s ideal weight and life stage. Get daily calories and the exact grams of food or number of cans, split per meal, based on the standard vet feeding formula.

No signup, no email. Adjust the dry and wet split to match what you actually feed, and share or bookmark the result with a link.

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Daily portion calculator

Your cat’s number, in ten seconds.

The plan updates as you type. Enter the calorie values from your own food bag and can for an accurate amount, then use the slider to match your dry and wet mix.

All wetAll dry

Your cat’s daily plan

Enter your cat’s ideal weight to see the daily calories and portions.

A starting guideline from the standard RER formula. Every cat is different, so confirm the right amount with your vet, especially for kittens, pregnancy, or medical diets.

Leaving your cat with a sitter? Add this feeding plan to a one-page care card so they get every portion right.

Make a care card

How it works

Calories first, then grams. Both depend on your food.

Every feeding number starts with calories, not grams. A cat’s resting energy requirement is 70 times its bodyweight in kilograms raised to the power 0.75. That gets multiplied by a life-stage factor: about 1.2 for a neutered adult, 2.5 for a growing kitten, lower for weight loss. The result is daily calories.

Grams and cans only appear once you know your food. Wet pouches, cans, and dry kibble all carry very different calories, so feeding by a fixed number of pouches is how a lot of indoor cats slowly gain weight. Enter the values from your packaging and the calculator converts calories into real portions for your specific food, split across the meals you choose.

Feed it right

Six things that change how much your cat should eat.

The calculator handles the math. These are the judgment calls that keep the number honest.

Use ideal weight, not current

Feed for the weight your cat should be. Indoor cats are commonly overweight, so if yours is carrying extra, enter the target weight and pick the weight-loss setting rather than feeding to the current number.

Neutering lowers the need

A neutered adult cat needs noticeably fewer calories than an intact one, which is why so many cats gain weight after the operation if the food does not change. Pick the setting that matches and the plan adjusts.

Read the label

A pouch of wet food might be 60 kcal, a can 80 to 100. Dry food runs 300 to 400 kcal per 100 g. Enter the real numbers from your packaging instead of guessing, since portions swing a lot between products.

Treats and milk count

Cat treats, dental sticks, and a saucer of milk all add calories. Keep extras under about 10% of the day, and remember many cats are lactose intolerant, so plain water is the safer drink.

Free-feeding hides overeating

Leaving a full bowl of kibble out all day makes portion control almost impossible. Measure the daily amount and split it into set meals so you can actually see how much your cat eats.

Cats hate sudden change

Cats are famously fussy and a sudden food switch can lead to a hunger strike or an upset stomach. Transition new food or a new amount slowly over 7 to 10 days, mixing old with new.

Common questions

Feeding questions cat owners actually ask.

How much, how often, wet versus dry, and what to do for an overweight cat.

How much should I feed my cat a day?
It depends on weight and whether the cat is neutered. A neutered adult cat needs roughly its resting energy (70 times bodyweight in kg, to the power 0.75) multiplied by about 1.2. For a 4 kg cat that is around 240 kcal a day, which is roughly three 80 kcal cans or a mix of wet and dry. Enter your cat’s details above for a number tied to your food.
How does this cat food calculator work?
It uses the standard veterinary formula. Resting energy requirement (RER) is 70 times bodyweight in kg to the power 0.75. That is multiplied by a life-stage factor (about 1.2 for a neutered adult, 2.5 for kittens, 0.8 for weight loss) to get daily calories, then divided by your food’s calorie content to get grams or cans.
How many times a day should I feed my cat?
Cats naturally eat many small meals, so two to four feedings a day suits them well. Splitting the daily amount across several small portions matches their grazing instinct and helps prevent the begging and bowl-emptying that comes with one big meal.
Should I feed my cat wet or dry food?
Wet food adds valuable moisture, which matters because cats have a low thirst drive and are prone to urinary issues. Dry food is convenient and good for grazing. Many owners do a mix. Use the diet-split slider above to see grams of dry and number of cans for any combination.
My cat is overweight. How do I adjust the amount?
Enter the target weight, not the current weight, and choose the weight-loss setting, which uses a lower multiplier. Cats must lose weight slowly: dropping it too fast can cause a dangerous liver condition called hepatic lipidosis. Always plan feline weight loss with your vet.
Is this a substitute for veterinary advice?
No. The result is a starting guideline from a standard formula. Kittens, pregnant or nursing cats, and cats on prescription diets have different needs. Always confirm the right amount and food with your vet, who can account for health conditions the calculator cannot see.