Skip to content
ENExplore Calculators

COPD (CAT) Score Calculator

Work out copd (cat) score instantly with clear inputs, formula shown and shareable results.

About COPD (CAT) Score Calculator

Adds the eight COPD Assessment Test items, each scored 0 to 5, and maps the 0 to 40 total onto the published impact bands.

Formula

CAT scoring

Total = sum of 8 items scored 0-5 (range 0-40); low <10, medium 10-20, high 21-30, very high >30

Worked example

With the default values below, COPD (CAT) Score Calculator returns CAT total score of 14. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sum of items 1-4 (cough, phlegm, chest tightness, breathlessness)accepts 0–20
6
Sum of items 5-8 (activities, confidence, sleep, energy)accepts 0–20
8

Results

CAT total score
14
Impact level
Medium impact
Mean score per item
1.75

Step by step

  1. 1Values used
  2. 2CAT scoring
  3. 3CAT total score= 14
  4. 4Impact level= Medium impact
  5. 5Mean score per item= 1.75

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

What score suggests poor health status?

10 or more is the threshold GOLD uses to define a more symptomatic patient group.

How often should CAT be repeated?

Typically at each review; a change of 2 points is considered the minimum clinically important difference.

Related Calculators

COPD (CAT) Score Calculator | Calcrivo