MIDAS calculator

The Migraine Disability Assessment (MIDAS) counts the days in the last 3 months on which headache stopped or halved your activity at work, at home and in your free time. The total gives a grade from I to IV.

Days in the last 3 months

1. On how many days in the last 3 months did you miss work or school because of your headaches?

2. How many days in the last 3 months was your productivity at work or school reduced by half or more because of your headaches? Do not include days you counted in question 1 where you missed work or school.

3. On how many days in the last 3 months did you not do household work because of your headaches?

4. How many days in the last 3 months was your productivity in household work reduced by half or more because of your headaches? Do not include days you counted in question 3 where you did not do household work.

5. On how many days in the last 3 months did you miss family, social or leisure activities because of your headaches?

Not scored, but useful for your doctor

A. On how many days in the last 3 months did you have any headache? If a headache lasted more than one day, count each day.

B. On a scale of 0 to 10, on average how painful were these headaches? 0 is no pain at all, 10 is pain as bad as it can be.

MIDAS © Innovative Medical Research 1997. The calculation runs in your browser; nothing is sent anywhere.

Answer the five questions to see your score. Empty answers count as 0.

Grades

Grade	Score	Meaning
I	0–5	Little or no disability
II	6–10	Mild disability
III	11–20	Moderate disability
IV	21 or more	Severe disability

The score is the sum of questions 1 to 5 and ranges from 0 to 270. Questions A and B describe how often and how badly headaches hurt; they are reported next to the score but not added to it.

Before you answer

Count days, not hours. A day on which a headache cost you half of your work counts as one day in question 2.
Do not count the same day twice within a pair: a day you missed work goes into question 1, not question 2.
If you kept a headache diary, use it. Counting from memory over three months tends to be less accurate.

Sources

Lilly Medical: Migraine clinical assessment scales, a medical education resource (2022). Question wording and scoring
Migraine Canada: MIDAS questionnaire. Grades and copyright notice
Benz et al. Translation, cultural adaptation and reliability of the German version of the MIDAS. Health Qual Life Outcomes 2018. States that MIDAS is free to use in clinical practice and research

Checked against these sources on 28 October 2026. How this page is written and checked