MIDAS calculator
Free MIDAS calculator for the past 3 months. Score missed days and limited days, see grades I–IV, and print the result. Nothing is saved or sent.
This calculator runs in your browser. Your answers are not saved and are not sent anywhere.
What MIDAS is
The Migraine Disability Assessment (MIDAS) questionnaire asks about the past 3 months. It was developed and tested by Stewart WF, Lipton RB, Dowson AJ, and Sawyer J, and published in Neurology in 2001 (PubMed 11294956). The questions on this page follow that questionnaire. Check the copyright and terms of use before reusing the questionnaire itself.
How scoring works
The total is the sum of five day counts. Missed days are days you missed work or school, could not do household work, or missed family, social, or leisure activities. Limited days are days you were at work, school, or household work but your productivity was reduced by half or more. This is the same split Mira uses when it totals disability from logged episodes.
Do not count the same day in both a missed question and a reduced-productivity question. Questions A and B stay outside the total.
Grades
- Grade I, score 0–5. Published name: little or no disability.
- Grade II, score 6–10. Published name: mild disability.
- Grade III, score 11–20. Published name: moderate disability.
- Grade IV, score 21 or more. Published name: severe disability.
These names come from the published grading. They are not a diagnosis of you. Discuss the result with your doctor.
Limitations
The score depends on remembering three months of days, which is imprecise. It counts days, not how bad each day felt, except for the unscored pain question. It does not separate migraine from other headache. It does not capture sleep, treatment, or everything else a diary can. A diary such as the headache diary records the days themselves. Reading headache vs migraine can help you describe symptoms to a clinician, which this score does not do.
FAQ
What is the MIDAS questionnaire?
MIDAS is the Migraine Disability Assessment, a short questionnaire published by Stewart and colleagues in Neurology in 2001. It asks how many days headaches limited work, household work, and social activities over the past 3 months.
How is the MIDAS score calculated?
Add the answers to the five scored questions. Questions about days you missed are grouped separately from days you were limited but still took part. Questions A and B are not included in the total.
What do MIDAS grades I to IV mean?
Grade I is 0 to 5, grade II is 6 to 10, grade III is 11 to 20, and grade IV is 21 or more. The published names for those bands are little or no disability, mild disability, moderate disability, and severe disability. A grade is a questionnaire band, not a diagnosis.
Do questions A and B count toward the score?
No. Question A records headache days and question B records average pain from 0 to 10. They give context and are not added to the MIDAS total.
Is a MIDAS score a diagnosis?
No. The score describes answers on a questionnaire. It does not diagnose migraine or measure every part of living with headache. Discuss the result with your doctor.
Does this calculator save or send my answers?
No. The score is calculated in your browser. Answers are not stored and are not sent to a server.
How can I track MIDAS over time?
A single score is one 3-month window. Mira records missed and limited days on each episode and totals them the same way, so you can see the score change from month to month.
This page is general information about a published questionnaire. It is not medical advice, a diagnosis, or a treatment plan. Talk with a qualified clinician about your symptoms.
Mira tracks MIDAS over time
Log the days headache made you miss plans or slow down. Mira totals those days into a MIDAS score for the period you choose, and keeps the history on your device.
