Activities of Daily Living Calculator

Basic ADLs (bathing, dressing, toileting, transferring, continence, feeding) and instrumental ADLs (managing finances, medications, transportation, and housework) tend to decline in a different order and reflect different underlying capacities -- IADLs require more complex planning and judgment and are often lost earlier, particularly in cognitive decline, while basic ADLs are more tied to physical function and tend to be preserved longer. Reporting both totals separately, alongside the combined score, lets a clinician see which tier of function is actually impaired rather than a single number that could mean very different things.

A high Katz ADL score with a lower Lawton IADL score is a classic early pattern in conditions like early dementia or after a health event that impairs planning and organization without affecting basic physical self-care -- the person can still bathe and dress themselves but may struggle to manage medications correctly, pay bills on time, or arrange transportation. This combination is often what prompts a family or clinician to consider additional support at home before basic self-care is affected at all.

This calculator maps the combined 0-14 score into four broad care-level bands -- independent living generally suits a score of 12-14, assisted living or in-home support fits 8-11, skilled nursing care corresponds to 4-7, and a score of 3 or below suggests a need for full-time nursing care. The mapping is based purely on the total score, not on which specific activities are preserved or lost -- two people with very different patterns of dependency can land in the same band if their totals match -- so the actual placement decision always weighs additional factors like which specific tasks are affected, caregiver availability, and safety risk, not just this single number.

Functional dependency in basic ADLs is a well-documented correlate of both fall risk and hospitalization risk in older adults, since the same physical impairments that make bathing or transferring difficult also make a person more likely to lose balance or develop complications during an acute illness. That general association is well established in the literature, but the specific numbers this calculator displays (fall risk level and hospitalization risk score) are this calculator's own illustrative arithmetic derived directly from the ADL/IADL totals, not a validated, published risk instrument in their own right -- so they should prompt further evaluation with a dedicated fall-risk or hospitalization-risk tool rather than stand alone as a prediction.