Kitten Weight Growth Chart

Compare your kitten's age and weight against a simple healthy growth curve and projected adult range.

Current band 3-4 months

Status Above expected range

How the curve works

Enter the age you believe is closest to your kitten's current stage.
The result compares the kitten's weight to a practical healthy range for that age.
The chart below highlights the current band so you can see the trend around it.

What to watch

Younger kittens should be checked often because the curve changes quickly.
If your kitten is far below or above the range for its age, discuss it with a veterinarian.
Use the chart as a growth planning tool, not as a substitute for hands-on body condition scoring.

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Growth status

Current band: 3-4 months.

Current band 3-4 months

Above expected range The curve rises quickly as muscle and bone structure build up.

Healthy range now 0.9 kg / 2.0 lb - 1.8 kg / 4.0 lb

Projected adult range 4.8 kg / 10.6 lb - 7.1 kg / 15.7 lb

Next milestone 5-6 months next

Source Kitten growth curve heuristic

Growth curve

The chart shows a practical healthy weight band by age so you can compare your kitten quickly.

0-1 months 0.1 kg / 0.2 lb - 0.5 kg / 1.1 lb

Milk feeding stage; weight changes quickly and weekly checks help.

Adult share: 12% - 22%

1-2 months 0.4 kg / 0.9 lb - 0.9 kg / 2.0 lb

Very rapid growth; most kittens are still tiny but steadily climbing.

Adult share: 18% - 28%

3-4 months 0.9 kg / 2.0 lb - 1.8 kg / 4.0 lb

The curve rises quickly as muscle and bone structure build up.

Adult share: 28% - 42%

5-6 months 1.6 kg / 3.5 lb - 2.8 kg / 6.2 lb

Still growing, but the body is starting to look more proportionate.

Adult share: 38% - 55%

7-8 months 2.0 kg / 4.4 lb - 3.4 kg / 7.5 lb

Growth is slowing; many cats are close to their adult frame.

Adult share: 48% - 68%

9-12 months 2.3 kg / 5.1 lb - 4.5 kg / 9.9 lb

Approaching adult size. Keep monitoring body condition instead of chasing fast gains.

Adult share: 62% - 90%

12+ months 2.8 kg / 6.2 lb - 5.2 kg / 11.5 lb

Adult weight is usually established; weight changes should be interpreted as condition changes.

Adult share: 82% - 100%

Frequently Asked Questions

How often should I weigh a kitten?

A young kitten can change very quickly, so weekly checks are useful in the early months. Once the curve stabilizes, every two to four weeks is usually enough for routine monitoring.

Does this chart replace a veterinary exam?

No. It is a practical planning tool. If a kitten is losing weight, failing to gain, or acting unwell, a veterinarian should be involved.

What if my kitten is mixed breed or larger than average?

A mixed-breed or large-boned kitten can sit a little above the curve and still be healthy. The overall trend matters more than any single measurement.

When do kittens become adults?

Many cats are close to adult size by about 12 months, but some continue to fill out a bit longer. Growth rate usually slows well before that.

This site provides estimates and planning tools only. It does not replace veterinary advice, diagnosis, or treatment.