How Big Will My Cat Get Calculator

How Big Will My Cat Get Calculator - Cat size by Week

Estimated Adult Weight (lb):

Estimated Adult Weight (kg):

1. What Determines a Cat’s Size?

Factors: A cat’s adult size depends on breed, genetics, nutrition, and health. Larger breeds like Maine Coons grow bigger than smaller breeds like Siamese.

Growth Phases: Cats grow fastest in their first 6-8 months, typically reaching adulthood around 1 year (52 weeks), though some breeds may stabilize earlier or later.

2. How Does the Calculator Work?

The calculator estimates your cat’s adult weight using this formula:

\[ \text{Final Size} = \left( \frac{\text{Current Weight}}{\text{Current Age in Weeks}} \right) \times 32 \]

Explanation: It calculates the growth rate (weight per week) and multiplies by 32, an adjusted factor to estimate adult weight based on early growth trends.

3. How Big Can Cats Get?

Average cats weigh 6-10 lb (2.7-4.5 kg), but large breeds like Maine Coons can reach 11-25 lb (5-11 kg). The largest recorded domestic cat weighed 46 lb (21 kg)!

4. Using the Results

Tips: Use this estimate to plan diet, exercise, and space needs. Monitor growth and consult a vet if your cat’s size deviates significantly from the prediction.

Cat Adult Weight Prediction Table

Age (weeks)	Weight (lb)	Estimated Adult Weight (lb)	Weight (kg)	Estimated Adult Weight (kg)
8	2	8	0.91	3.63
12	3	8	1.36	3.62
16	4	8	1.81	3.63
20	5	8	2.27	3.62
24	6	8	2.72	3.63

Favorite