The Barthel Index measures how much assistance a person needs with the basic activities of daily living. The modified version introduced by Shah and colleagues in 1989 replaced the original two- or three-point items with a consistent five-level scale, which improved its sensitivity to the smaller changes that matter during rehabilitation.
Ten activities are each rated from fully dependent to fully independent, weighted by how much assistance the activity typically demands, and summed to a total out of 100. Mobility and transfers carry the most weight because they carry the most care burden.
Zdrovia: https://www.zdrovia.ca/resources/modified-barthel-index/
Functional Assessment
Modified Barthel Index Calculator
Rate each activity on the five-level assistance scale. The total is weighted automatically and updates as you go.
Washing face, combing hair, brushing teeth, shaving
Includes cutting food and opening containers
Getting on and off, managing clothing, cleaning
Includes fastenings, braces, and shoes
50 metres on level ground
Level key
Unable to perform: Cannot do any part of the task
Attempts but unsafe: Tries, but not safely without supervision
Moderate help required: Needs substantial assistance
Minimal help or supervision: Needs standby help or cueing only
Fully independent: No assistance of any kind
Total score
Complete all ten activities to calculate a valid score (0 of 10 scored).
Assessment incomplete
Item breakdown
These results are estimates based on published clinical data and are for informational purposes only. They do not constitute medical advice, a diagnosis, or a treatment recommendation. Interpret results with a qualified healthcare professional and alongside a comprehensive clinical assessment.
Zdrovia's smart blocks drop the Modified Barthel Index (all ten items, the total, and the dependence band) into a patient note in one click. See how smart blocks work →
Score the MBI straight into the chart note
Zdrovia's smart blocks drop the Modified Barthel Index (all ten items, the total, and the dependence band) into a patient note in one click.
The five levels of assistance
Every item uses the same five-level structure: unable to perform the task at all; attempts the task but is unsafe; requires moderate help; requires minimal help or supervision; and fully independent. The point values attached to each level differ by item because the items are weighted differently.
The distinction between 'unsafe' and 'moderate help' is the one that most often causes inconsistency between raters. A patient who attempts a transfer independently but does so in a way you would not leave unsupervised scores at the unsafe level, not at the independent one; the score reflects what is safe, not what is attempted.
Weighting and the total
Ambulation and chair-to-bed transfers are each worth up to 15 points; feeding, toileting, dressing, stair climbing, and bowel and bladder control are worth up to 10 each; personal hygiene and bathing are worth up to 5 each. The maximum is 100.
The weighting is deliberate. Personal hygiene and bathing are worth less not because they matter less to the person, but because they demand less of a caregiver than moving someone between a bed and a chair several times a day. The index measures assistance burden, which is related to but not the same as quality of life.
Use the wheelchair scale only when the patient is unable to ambulate and has been trained in wheelchair management. It has a maximum of 5 rather than 15, so the highest achievable raw total in wheelchair mode is 90. Do not normalize that score to 100, and do not compare it directly with an assessment scored using ambulation.
Interpreting the total
This calculator uses the commonly cited 0–20 total, 21–60 severe, 61–90 moderate, 91–99 slight, and 100 independent convention. Other Barthel implementations use different bands, so record the scoring version and interpretation convention with the result. A score of 100 means the person needs no assistance with these ten activities, not that they can live entirely unsupported, which also depends on instrumental activities the index does not measure.
The index is at its most useful as a repeated measure. A single total describes a moment; a series describes a rehabilitation trajectory, and the item-level scores tell you which activities are driving the change. Recording the ten item scores rather than just the total is what makes that possible.
Other clinical assessment references