Cat Weight Loss Calculator
Is your cat overweight? Use our Cat Weight Loss Calculator to plan a safe and effective weight loss program. Calculate daily calorie needs for weight loss and estimate how long it will take for your cat to reach a healthy weight.
Helping Your Cat Lose Weight Safely
Obesity is one of the most common health problems in cats. Extra weight increases the risk of diabetes, arthritis, heart disease, and decreases overall quality of life. A structured weight loss plan can help your cat achieve and maintain a healthy weight.
Why Healthy Weight Matters
- Improves mobility and reduces joint pain.
- Reduces risk of chronic diseases like diabetes and heart disease.
- Enhances energy levels and quality of life.
- Can extend lifespan by 2+ years in overweight cats.
Ideal Weight for Cats
Healthy adult cat weights vary by size and breed:
- Small cat (Oriental breeds): 3-4 kg
- Average domestic cat: 4-5 kg
- Large breeds (Maine Coon, Norwegian Forest): 6-8 kg
Your veterinarian can help you determine your cat’s ideal target weight.
Safe Weight Loss Guidelines
Cats should lose weight gradually to avoid health risks like hepatic lipidosis (fatty liver disease):
- Recommended weight loss rate: 0.5% - 2% of body weight per week
- Never reduce calories drastically or starve your cat
- Weight loss should be slow and steady, monitored by a veterinarian
Estimating Calorie Needs for Weight Loss
The Resting Energy Requirement (RER) is calculated as:
RER = 70 x (Ideal Weight in kg)0.75
For weight loss, cats typically receive:
- 80% of RER for slow weight loss
- 70% of RER for moderate weight loss
- 60% of RER for more aggressive plans (vet supervision required)
Expected Duration of Weight Loss
Example:
If your cat weighs 6 kg and your target is 4.5 kg with 1% weekly loss:
6 kg → 4.5 kg = 1.5 kg to lose
1% weekly = ~60g/week → ~25 weeks to reach goal
Common Mistakes to Avoid
- Reducing food too quickly → risk of liver disease.
- Not adjusting calorie intake as weight decreases.
- Feeding high-calorie treats while on a weight loss plan.
- Not monitoring progress or weighing the cat regularly.
Weight Loss Tips
- Use a kitchen scale to measure food portions accurately.
- Feed multiple small meals rather than one large meal.
- Increase interactive play and physical activity.
- Offer low-calorie treats sparingly or eliminate treats.
- Recalculate calorie needs monthly as your cat loses weight.
- Schedule regular vet checkups to monitor progress.
FAQs About Cat Weight Loss
How fast should a cat lose weight?
Safe rate is 0.5% to 2% of body weight per week. Faster loss can be dangerous.
How many calories should my cat eat to lose weight?
Typically 60-80% of RER based on target weight. Our calculator provides a personalized estimate.
How often should I weigh my cat?
Weigh your cat every 2-4 weeks to monitor progress and adjust feeding accordingly.
Is exercise important for cat weight loss?
Yes! Encourage daily play sessions with interactive toys to burn calories and maintain muscle mass.
Can I feed a special weight loss diet?
Many veterinary and commercial brands offer calorie-controlled diets. Consult your vet for recommendations.
Using This Calculator
- Enter your cat’s current weight and target weight.
- Select a safe weekly weight loss rate.
- Click "Calculate" to get daily calorie needs and estimated duration.
- Use the results to discuss a weight loss plan with your veterinarian.