orange / ginger and white senior cat sitting on wood floor next to blue cat food bowl looking up at cat owner for food
orange / ginger and white senior cat sitting on wood floor next to blue cat food bowl looking up at cat owner for food

How Much Food to Feed Your Cat, From Kitten to Senior

When it comes to your cat's health, it's hard to overstate how large a role diet and nutrition play. Of course, making sure your cat is getting the exact vitamins, minerals and nutrients they need is much easier said than done.


If you have lots of questions, or maybe even feel like you don't know what questions to ask, you're not alone. After all, everybody loves adorable furry things, but not everyone knows the optimal omega-6 to omega-3 ratio for a cat’s diet.



What to Know about Cat Food Nutrition

So where is the best place to start understanding your cat's nutritional needs? Take a look at the back of your cat's food packaging. Here are a few important things to look for:

  1. A high-quality protein source at the top of the ingredients list, like chicken or salmon
  2. Information about how the recipe supports your cat's life stage (kitten, adult, senior)
  3. Details about key vitamins and minerals


Once you're confident that your cat's diet includes the nutritional foundation it needs, it's time to get into some feeding tips specific to your cat.



How Much Should a Cat Eat Each Day?

How much — and what — to feed your cat varies based on their life stage and unique needs. Let's walk you through some of need-to-knows at each stage of your cat's life.


Feeding a Kitten

Kittens may not look all that different from adult cats, but their bodies have very different nutritional requirements. First, kitten bodies burn energy at a furious pace to fuel all of that growing and playing. That's why kitten food should be more energy-dense. Kittens also need to eat smaller meals more often throughout the day, while an adult cat may only eat once in the morning and once at night.


Their food should contain certain ingredients that are crucial for their development. Amino acids like taurine are vital to the strengthening of their hearts, vision and digestion. Vitamin E helps your kitten build up a sturdy immune system. Choosing a kitten food that's scientifically formulated to fit your kitten's needs is an important part of caring for them.


When deciding how much to feed your kitten, there are a few methods you can use. Age is the most straightforward, if you're pretty confident you know when your kitten was born. Weight is the second method and can be more appropriate for cats that might be above or below average.


See below for feeding guides based on your chosen method. Remember to divide the total recommended feeding amount by the number of times you feed your kitten per day to get the actual portion size per feeding.


IAMS™ Proactive Health™ Healthy Kitten Feeding Guidelines (Cups per Day)

Age (Weeks) Cups per Day
Up to 8 ⅓ cup
12 ½ cup
16 ½ cup
24 ½ cup
32 ½ cup
40 ½ cup


Kitten Weight (lbs.) Cups per Day
4 lbs. ⅓ cup
6 lbs. ½ cup
8 lbs. ⅔ cup
10 lbs. ¾ cup
12 lbs. ¾ cup
16 lbs. 1 cup
18 lbs. 1 cup
20 lbs. 1 ¼ cup


If you opt for a wet food like IAMS™ Perfect Portions™ Healthy Kitten Paté, feed your kitten 4–7 servings each day, adjusting to maintain their ideal body condition.



Feeding an Adult Cat

Around your kitten's first birthday, it's time to make the switch to an adult cat food. The trickiest part of feeding an adult cat is adjusting your kitten-feeding habits to the mature animal your cat has grown into. As mentioned above, adult cats generally feed fewer times per day, so divide the recommended feeding amount by the number of times you plan to feed them during the day.


At the same time, you'll want to consider a few other factors.

  • What is your cat's activity level? Are they zooming around the house, or just going for long walks from the basement to the bedroom? The more active your cat is, the more energy (and food) they’ll need.
  • Is your cat eating treats? If your cat enjoys an occasional snack outside of their main meals, don't forget to factor those calories into the amount you're feeding them.
  • Wet or dry? Dry food is more calorie-dense, so if you plan to replace some dry food with wet food, make sure you're factoring in the difference.


Just like kitten food, you'll want your adult cat food to be specially formulated to suit their needs. For example, sodium is an essential nutrient that supports nerve and muscle function. And you probably already know that fiber is crucial to pushing food through your cat's digestive system.


All that's left is to give them the right amount of food. On average, the guidelines below should help you find a good baseline for feeding your cat.


IAMS™ Proactive Health™ Healthy Adult with Chicken Feeding Guidelines (Cups per Day)

Weight of Cat (lbs.) Feed Daily
4 lbs. ⅓ cup
8 lbs. ½ – ⅔ cup
12 lbs. ⅔ – ¾ cup
16 lbs. ¾ – 1 cup
22 lbs. 1 – 1 ¼ cup


For wet food, be sure to consult the packaging to determine the right amount to give your cat each day. As a general rule, feed adult cats 3-4 servings per 5 pounds of body weight daily.


Feeding a Senior Cat

Around seven years of age, your cat should be ready to make the switch to a recipe for senior cats. Your cat will gradually begin to slow down as they age, and feeding them a diet designed for mature cats accounts for the burning of fewer calories throughout the day.


At this life stage, look for food that includes vitamins and minerals to support your cat’s aging immune system, muscles and heart. You won’t be surprised to learn that IAMS™ Healthy Senior cat food contains all the nutrients your buddy needs to support their vitality.


For a general idea of how much to feed your senior cat, follow the guidelines below.


IAMS™ Proactive Health™ Healthy Senior Feeding Guidelines (Cups per Day)

Weight of Cat (lbs.) Feed Daily
4 lbs. ¼ – ⅓ cup
8 lbs. ⅓ – ½ cup
12 lbs. ½ – ⅔ cup
16 lbs. ⅔ – ¾ cup
22 lbs. ¾ – 1 cup


If your aging cat prefers wet food like IAMS™ Perfect Portions™ Healthy Senior Cuts in Gravy, it's recommended to feed 5 servings per 8 pounds of body weight daily (adjusting as needed to maintain a healthy weight).



That's a Recipe for a Happy Cat

Now that you know more about caring for your cat’s nutritional needs, it might be time to take another look at what your cat’s eating. If you need help finding new food to fit your cat's needs, try getting a recommendation from our Cat Food Selector — and remember to switch your cat’s food gradually to avoid GI distress.


As a final thought, remember there are some foods and substances you should keep your cat away from, no matter what life stage they're at. These include acetaminophen (Tylenol), antifreeze, bleach, lilies, chicken bones, ribs, or other splintery bones, chocolate, garlic, onions, leeks, raisins, grapes or chives. It’s always best to stick with cat food and cat treats designed specifically for your pet’s nutritional needs.

orange / ginger and white senior cat sitting on wood floor next to blue cat food bowl looking up at cat owner for food
orange / ginger and white senior cat sitting on wood floor next to blue cat food bowl looking up at cat owner for food
both email signup


Get pet care advice, product updates, event information and more when you sign up for the IAMS™ newsletter made with your pet in mind.


Shop Dogs

Shop Cats


© 2022 Mars or Affiliates. US Patents Pending. Other trademarks are property of their respective owners.

Hi! 👋

Need to chat? 💬

We’re here to help. 🐶🐱

👋 Hi, I'm your Pet Expert!

pet Logo
pet Logo