mMRC Dyspnea Scale

Describe your breathlessness. Understand its impact on daily life.

Everyday activity

Think about your usual limitations.

Walking & exertion

Choose the statement that fits best.

Clinical context

Discuss new or worsening symptoms.

mMRC DYSPNEA GRADE

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Choose a statement

No selection

Choose the description that best matches your usual activity-related breathlessness.

Your selected activity level

0Selected1Selected2Selected3Selected4Selected

Scale: 0–4

Higher grades indicate greater activity-related breathlessness.

Symptom threshold: ≥2

mMRC ≥2 indicates a higher breathlessness burden in COPD assessment. It does not determine a GOLD group or treatment by itself.

Illustrative adult during everyday walking; not a clinical test.

A grade is not a diagnosis

Breathlessness has many causes. Review changes with a healthcare professional.

What your grade tells you

Grade range	What it suggests
Grades 0–1	Lower reported breathlessness
Grades 2–4	Higher reported breathlessness

COPD assessment also needs spirometry, exacerbation history and a broader symptom review.

mMRC uses grades 0–4; the original MRC scale uses 1–5.

Scoring & clinical limitations

The grade is the selected activity description. It is not a sum, percentage or measure of oxygen saturation. The coloured categories show their order, not equal clinical intervals or a validated severity percentage.

mMRC does not diagnose COPD or asthma, determine spirometric severity, assess an acute exacerbation or prescribe treatment. Its ≥2 threshold is only part of a broader COPD symptom assessment. GOLD group assignment also requires the appropriate clinical and exacerbation history context.

Choose a statement describing your usual limitations. Do not attempt a walking or exercise challenge to choose a grade. A new or worsening change merits professional assessment; acute severe symptoms require urgent help regardless of the selected grade.

Descriptions are presented in concise third-person wording for this interface. Source references are provided below; no institutional validation of this website is claimed.

Frequently asked questions

Does this diagnose COPD?

No. mMRC describes how breathlessness affects daily activity. Diagnosing COPD requires an appropriate clinical assessment and spirometry. A grade does not identify the cause of breathlessness or determine treatment.

Is Grade 0 a guarantee of healthy lungs?

No. Grade 0 means the selected description reports breathlessness only with strenuous exercise. It does not prove healthy lungs, normal oxygen levels or absence of disease.

How is mMRC different from MRC?

This modified scale uses grades 0–4. The original MRC breathlessness scale uses 1–5. Their numbering should not be mixed. Record the scale name together with the grade.

When should I seek urgent help?

Seek emergency help for sudden or severe breathlessness, chest pain, blue lips or other serious symptoms. Do not use a low mMRC grade to delay care. Discuss new or worsening usual symptoms with a healthcare professional.

Sources & References

GOLDGlobal Initiative for Chronic Obstructive Lung Disease (GOLD)COPD symptom assessment and mMRC guidance.

Medical Research Council (MRC)Breathlessness scale background and original MRC research.

American Thoracic Society (ATS)Dyspnea assessment resources and clinical materials.

References only. No institutional endorsement.

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