Functional Independence Measure (FIM) Calculator

How it is calculated

The tool does not score individual items. You enter two subscores that a clinician has already worked out: the motor subscore (13 items, each scored 1 to 7, so 13 to 91) and the cognitive subscore (5 items, so 5 to 35). It adds them: total FIM = motor + cognitive, which ranges from 18 to 126, and shows it as a score out of 126. A motor value outside 13–91 or a cognitive value outside 5–35 gives no result. The level shown follows fixed bands: 126 is Complete independence; 108 to 125 is Modified independence; 19 to 107 is Modified dependence; 18 is Complete dependence. The tool is a summing aid for recorded scores, not a way to assess a patient.

Common mistakes

• Entering the sum of the item scores for the wrong group, such as the 5 cognitive items as the motor subscore. The ranges differ: motor is 13–91 and cognitive is 5–35.
• Entering an average item score (1 to 7) instead of the subscore total. For the motor part you need the sum of all 13 item scores.
• Entering the total in one field. The motor and cognitive fields must be filled separately, and the tool adds them.
• Reading the level as a full clinical judgment. It only shows the band of the total score; the pattern across items matters too.
• Comparing totals from patients with an item left unscored. Every item must carry a score of 1 to 7 for the subscore to be valid.