Healthy Cat Weight Chart by Age & Breed
New data reports that a shocking 61% of felines are either overweight or obese.1 Excessive weight gain in cats opens the door to a tremendous world of health problems for our four-legged friends, but underweight cats also have their fair share of health concerns to contend with.
While the healthy cat weight for most domestic felines is between 8 and 12 pounds (3.6-5.4 kg), several factors impact how heavy a cat should be, including age, breed, gender, medical history, and more.
Keep reading for a comprehensive breakdown of the ideal cat weight or click on a link below to jump straight to the information you’re looking for.
- How Much Should a Cat Weigh?
- Average Cat Weight Chart by Age
- Average Cat Weight Chart by Breed
- Average Weight of a Male Cat vs Female Cat
- How Health Issues Impact Cat Weight
- The Importance of Weight Management for Cats
- How to Tell if Your Cat Is Overweight or Underweight
- Weight Loss Tips For Fat Cats
- Weight Gain Tips For Thin Cats
- How to Maintain the Ideal Cat Weight
- Cat Weight FAQs
How Much Should a Cat Weigh?
Most adult domestic cats weigh about 8–12 pounds (3.6–5.4 kg), but age, breed, sex, and body condition matter more than the number on the scale alone.
Determining how much a cat should weigh will depend on:
- Age
- Breed
- Gender
- Medical history
Cat Weight Chart by Age
The ranges provided below are a helpful benchmark, but it should be noted that they do not account for your pet's body condition, diet, and daily routine.
Cat Age | Healthy Weight (lb) | Healthy Weight (kg)
|
|---|---|---|
8 weeks | 1.5–2 lb | 0.7–0.9 kg |
3 months | 3–4 lb | 1.4–1.8 kg |
4 months | 4–5 lb | 1.8–2.3 kg |
5 months | 5–6 lb | 2.3–2.7 kg |
6 months | 6–7 lb | 2.7–3.2 kg |
7–9 months | 7–9 lb | 3.2–4.1 kg |
10–12 months | 8–10 lb | 3.6–4.5 kg |
Kitten growth varies significantly by individual and breed. Regular vet growth checks are important to ensure your kitten is developing properly.
Adult Cat Weight Chart by Age
Cat Age (years) | Healthy Weight (lb) | Healthy Weight (kg)
|
|---|---|---|
1 | 8–12 lb | 3.6–5.4 kg |
2 | 8–12 lb | 3.6–5.4 kg |
3–6 | 8–12 lb | 3.6–5.4 kg |
7–10 | 8–12 lb | 3.6–5.4 kg |
11+ | 8–12 lb | 3.6–5.4 kg |
A 1-year-old cat is usually close to adult size, but the healthy weight still depends on breed and body frame. For most adult domestic cats, 8–12 pounds is a common healthy range, but some healthy cats fall outside that range. Many healthy adult cats stay in a similar weight range throughout their lives, and body condition score is more useful than weight alone for determining health.
If you're wondering how heavy a cat should be by age, younger pets tend to be on the lighter end of the spectrum. Obesity in cats is more common in older pets due to decreased activity.
Cat Weight Chart by Breed
The healthy weight for a cat also varies by breed, in addition to age, gender, and medical history. For example, a Maine Coon can be considered healthy at 20 pounds, whereas a Siamese cat shouldn't weigh more than 10.
The Association for Pet Obesity Prevention (APOP) recommends the following weight ranges 2 as ideal for different cat breeds:
Breed | Average Weight |
|---|---|
Siamese | 5-10 lb |
Persian | 7-12 lb |
Domestic Shorthair | 8-10 lbs |
Bengal | 8-15 lb |
Maine Coon | 10-25 lb |
Average Weight of a Male Cat vs Female Cat
In general, males tend to be bigger and heavier than females. For example, a Siamese male cat weighs between 11 and 15 pounds, whereas a female weighs from 8 to 12 pounds.
Another crucial factor is your cat's reproductive status. Cats who haven't been spayed or neutered typically have faster metabolisms, making it simpler for them to maintain a healthy weight.
Most veterinarians concur that cats who have been spayed or neutered tend to gain weight more quickly. Following spaying or neutering, it is recommended that you reduce the amount of food you feed your cat.
How Health Issues Impact Cat Weight
In some cases, atypical weight gain or weight loss is associated with health issues in cats that might require specific treatment.
Feline Health Conditions That Contribute to Weight Gain
If your cat eats a healthy diet and gets proper exercise but still seems to be gaining weight, it is possible that they have one of the following underlying medical conditions:
- Arthritis
- Acromegaly
- Hypothyroidism
- Cushing’s disease
Feline Health Conditions That Contribute to Weight Loss
Similarly, if you see your pet is rapidly losing weight, it can be a sign of a serious medical condition that can reduce appetite and result in weight loss, such as:
- Inflammatory bowel disease (IBS)
- Hyperthyroidism
- Kidney disease
- Liver disease
- Pancreatitis
- Dental disease
- Respiratory disease
- Conditions that cause pain, such as osteoarthritis
If your cat has stopped eating altogether, be sure to get in touch with your vet immediately, even if there's no weight loss.
Hepatic lipidosis, also known as "fatty liver," is a dangerous illness that can affect cats who have stopped eating, especially obese cats. This liver ailment calls for rapid medical attention since it can cause serious health problems.
Pro Tip: Pet insurance can be very helpful in paying the costs of vet care for your cat for obesity-related illnesses. Some pet wellness plans also cover supplements that you might give your cat to help them achieve and maintain a healthy weight.
Most vets agree that pet insurance is worth it, but it is very important to choose the right insurer that satisfies your cat's needs. Use Pawlicy Advisor to compare quotes from top pet insurance companies and get reimbursed on unexpected vet bills.
The Importance of Weight Management for Cats
Obesity is one of the most common health issues in cats , which places them at increased risk of developing secondary health issues that could severely impact their quality of life. Some examples include:
- Diabetes
- Arthritis
- Pancreatitis
- Kidney disease
- Liver disease
- Hepatic lipidosis
- Urinary problems
- Hyperthermia
- GI issues
- Skin and joint problems.
Research has also shown that overweight cats also have a shorter life span, with a life expectancy of just five to 10 years (five years shorter than their healthy counterparts).
Tragically, after a certain amount of time, the odds of an overweight cat losing weight become very slim, which is why pet parents need to proactively manage their cat's weight before it's "too late."
How to Tell if Your Cat Is Overweight or Underweight
There are a few different ways to find out how your pet compares to the average cat's weight in his or her demographic.
- First, step on a scale and weigh yourself.
- Then, pick up your cat, get back on the scale, and subtract the first weight measurement from the second one.
- Calculate the difference to see how heavy your cat is.
You can also refer to our cat weight chart above to see where your feline friend falls, but remember that these ranges can be limited and not a true indication of whether your cat's weight is heavier or lighter than the ideal weight.
Body Condition Score Chart
A better way to identify under or overweight cats is by using the body condition score (BCS) system. The BCS is what vets use to visually and physically assess whether a feline is fit and healthy. BCS rates cats from 1 to 9, with 1 designating a cat that is severely underweight and 9 designating obesity.
A cat is generally considered overweight when they are 10–20% above ideal body weight, and obese when they are more than 20% above ideal body weight.
Most veterinarians use body condition score, not scale weight alone, to decide whether a cat is underweight or overweight:
Body Condition | What You'll Notice | What You'll Feel Over Ribs/Spine | What It Usually Means | What to Do Next
|
|---|---|---|---|---|
Underweight (BCS 1-3) | Ribs, spine, and hip bones are easily visible; severe abdominal tuck; no body fat | Ribs and spine are prominent with no fat covering | Cat is below ideal body weight and may have health issues | Schedule a vet visit to rule out illness and discuss a weight gain plan |
Ideal (BCS 4-5) | Slight abdominal tuck; ribs not visible but easily felt; proportional waist | Ribs are easily felt with a thin layer of fat covering | Cat is at a healthy weight | Maintain current diet and exercise routine |
Overweight (BCS 6-7) | Ribs difficult to feel; noticeable fat deposits; minimal waist definition | Ribs are hard to feel due to moderate fat covering | Cat is 10–20% above ideal body weight | Consult your vet about a weight loss plan and portion control |
Obese (BCS 8-9) | Ribs not palpable; heavy fat deposits on lower back, face, and limbs; waist and abdomen distended | Ribs cannot be felt; thick fat layer over entire body | Cat is more than 20% above ideal body weight | Immediate vet consultation needed for health screening and supervised weight loss |
Ultimately, your primary care veterinarian will be your best source of information when it comes to your cat's weight management journey. They can tell you exactly how much weight your cat needs to lose or gain to improve its health and overall quality of life.
Weight Loss Tips For Fat Cats
The first thing to do when addressing your feline's obesity is to make sure that they are eating the right food for their age. A neutered or senior cat diet, for instance, will offer better calorie control.
Talk to your veterinarian about weight loss diets that contain all the necessary proteins, vitamins, and minerals while consuming fewer calories. In addition, be sure to reduce treats and steer clear of giving your pet any human food . Consider moving your pet's food bowl to different areas of the home in order to encourage movement during meals.
Playing games with your cat will increase exercise, which will help your cat burn calories. Provide enough vertical climbing surfaces and rotate a variety of toys.
How to Stop a Cat from Eating Too Much
If your cat is eating too much, here are a few tips to help you reduce their food intake:
- Don't let your cat free-feed or fill the food bowls anytime they are empty. Maintain a regular eating schedule instead.
- Be mindful of the food's nutritional content. Even if your cat consumes a lot of food, they could still not be receiving all the necessary nutrients.
- Use a feeding toy that releases food as your cat plays with it or a slow-feeding bowl. This way, your cat won't just consume less food, but they'll also get some exercise as a result.
Weight Gain Tips For Thin Cats
If your cat needs to gain a few pounds, start by checking the quality of their food. It's crucial to feed underweight cats a nutrient and calorie-dense diet that is high in protein. Try out several flavors and food types, both dry and wet, to see which ones they prefer.
You should also try giving your cat little meals throughout the day rather than huge meals for breakfast, lunch, and dinner if they aren't a big eater.
How to Get an Underweight Cat to Eat
The following tips can help your cat put on a few much-needed pounds:
- Feed your cat canned food. Because it has more moisture, canned food can have a more alluring flavor and aroma for your cat than dry food.
- Slightly warm your cat's food to increase its aroma and make it more appealing.
- Try hand-feeding your feline friend to encourage them to eat more. Petting might also help.
- Separate the litter box from the food and drink bowls to simulate your cat's natural behavior.
If your cat still refuses to eat, have them checked by a vet to ensure that there isn't an underlying health condition causing the loss of appetite.
How to Maintain the Ideal Cat Weight
Once your cat has reached an ideal weight, you'll need to make sure to maintain that weight. Here's some advice that will help:
- Set a regular feeding schedule.
- Limit the number of treats they eat and avoid offering food that's bad for cats due to its high sugar or fat content
- Consult your vet to determine whether your cat now needs a vitamin, mineral, or high-calorie supplement.
Regular weight checks at the vet's office are the best way to ensure that your cat's ideal weight is maintained. Annual pet checks will give your vet the chance to measure weight loss or gain that you might not notice at home.
Your cat's health is priceless; let's protect it together.
Cat Weight FAQs
Are cats supposed to be big?
Most domestic cats should weigh about 10 pounds, but some cat breeds, such as the long and large Savannah and the muscular Maine Coon, are naturally bigger in size and still healthy.
Why are some cats heavier than others?
A cat's weight depends on factors like anatomical breed differences, bone structures, etc. In addition, certain risk factors make some cats more likely to gain weight; for example, obesity is a great health risk for indoor cats.
How much is too heavy for a cat?
According to APOP, cats who are 10-20% over their ideal body weight are considered overweight, whereas cats who are 20% and over are considered obese.
Why is my cat losing weight?
Unintentional weight loss is a nonspecific sign that can have many causes, such as food allergies, GI infections, IBD, etc. If you notice that your cat is losing weight even though they're eating well, be sure to call your vet.
References:
- Association for Pet Obesity Prevention (APOP), “2022 Survey” Accessed Oct. 1, 2024.
- APOP, “Ideal Weight Ranges” Accessed Oct. 1, 2024.
DVM
Ricky Walther, DVM, is a small animal general practitioner in the greater Sacramento, California area. Realizing the positive financial and medical impact that pet insurance can provide for pet parents and the profession, he lends support and advice to companies like Pawlicy Advisor "The Pet Insurance Marketplace") that simplify the process of connecting with veterinary financing resources.
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