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Cat body condition scoring (BCS) uses a 1–9 scale to assess whether a cat is at a healthy weight. ~50% of pet cats in developed countries are overweight.

公式

Cat BMI = Weight (kg) / (Length (m)^2); Ideal 4.0–6.0 kg/m^2; Overweight > 6.5, Obese > 8.5
Weight
Cat body weight (kg)
Length
Cat body length (Meters (nose to tail base))

ステップバイステップガイド

  1. 1Score 1–3: Underweight (ribs and spine prominent)
  2. 2Score 4–5: Ideal (ribs palpable; visible waist)
  3. 3Score 6–7: Overweight (ribs hard to feel)
  4. 4Score 8–9: Obese (cannot feel ribs)

解いた例

入力
Ribs palpable, slight waist visible from above
結果
BCS 4–5 — Ideal body condition

よくある質問

What's ideal cat weight?

Depends on breed. Average domestic: 4–5 kg. You should feel ribs without pressing hard. Spine palpable but not prominent. Slight waist visible from above.

How do I measure cat length?

Nose to tail base (where tail joins spine). Not including tail. Use flexible ruler. For BMI, meter measurement more accurate than visual estimate.

What's obesity risk in cats?

Diabetes 7x higher in obese cats. Arthritis, urinary issues, reduced lifespan. Indoor cats overeat + low activity = overweight common. Diet + activity critical prevention.

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