Lawton IADL Scale Calculator
Score all 8 Instrumental Activities of Daily Living — telephone, shopping, food preparation, housekeeping, laundry, transportation, medications, and finances — with complete scoring criteria for community independence assessment and care planning.
NMClinically reviewed byDr. Nikhil Mahajan, PT, MPT · Jan 15, 2026Lawton IADL Scale — Score Interpretation
| Score | Classification | Community Independence | Typical Care Need |
|---|---|---|---|
| 8 (♀) / 5 (♂) | Fully Independent | Independent in all IADLs — community living possible | No IADL support required |
| 5–7 (♀) / 3–4 (♂) | Mildly Impaired | Community living with minimal support | Part-time home assistance; transportation support |
| 2–4 (♀) / 1–2 (♂) | Moderately Impaired | Community living requires significant support | Daily home care; medication management support |
| 0–1 (♀) / 0 (♂) | Severely Impaired | Cannot live independently in community | Assisted living, memory care, or SNF placement |
| Key: Medication management | Dependence in medication management is particularly important — often early sign of cognitive decline and associated with adverse drug events and hospitalisation. | ||
What Is the Lawton IADL Scale?
The Lawton Instrumental Activities of Daily Living (IADL) Scale was developed by M. Powell Lawton and Elaine M. Brody at the Philadelphia Geriatric Center and published in The Gerontologist in 1969. It assesses eight complex activities required for independent community living — distinct from the basic self-care activities measured by the Katz ADL Index.
Why IADLs Matter More Than Basic ADLs for Early Assessment
Instrumental ADLs are more cognitively demanding than basic ADLs (bathing, dressing). A patient with early dementia who still bathes and dresses independently may have already lost the ability to manage medications, finances, or transportation. The Lawton IADL is therefore a more sensitive early indicator of cognitive decline than the Katz ADL — IADL impairment typically precedes basic ADL impairment by months to years in neurodegenerative conditions.
Gender Considerations in Scoring
The original Lawton and Brody (1969) scoring excluded items 3 (food preparation), 4 (housekeeping), and 5 (laundry) for men — reflecting the social context of the 1960s in which these were considered female-typical roles. Modern clinical guidance recommends assessing all 8 items in all patients regardless of gender, as the purpose is to identify functional impairment and care needs, not to make gender-based assumptions. Our calculator applies both scoring approaches — traditional gender-specific maximum, and all 8 items for all patients.