Lawton IADL Scale Calculator

Lawton IADL Scale Calculator for Geriatrics. Higher scores suggest more independent instrumental function, but a total does not determine living arrangements or establish a cognitive diagnosis.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

This route records the eight-domain Lawton total. The source describes a historical five-domain version as well, making version identification essential: https://www.alz.org/media/Documents/lawton-brody-activities-daily-living-scale.pdf.

When to use this calculator

Review practical support needs after an authorized IADL assessment. Record whether the person had an opportunity to perform the assessed tasks, as well as the total.

Inputs used

  • Final eight-domain 0-8 total
  • Instrument version and performance context

Clinical interpretation

Higher scores suggest more independent instrumental function, but a total does not determine living arrangements or establish a cognitive diagnosis.

Worked example

A 5/8 report and a historical 5/5 report share the number 5 but not its meaning. Entering either as an unlabeled 5 would hide that difference. This page accepts the former version only and does not rescale the latter to 8.

Limitations and safety notes

Role, environment and assessment version affect comparison. Do not treat the historic sex-based selection of domains as a universal contemporary rule. No task wording or instrument scoring table is reproduced.

Frequently asked questions

Can I compare two totals without knowing the denominator?

No. Preserve the version and domain coverage first; otherwise an apparent change may be a scoring change.

References

  • Lawton-Brody source version and historical denominator notes, hosted by the Alzheimer's Association. https://www.alz.org/media/Documents/lawton-brody-activities-daily-living-scale.pdf

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

Related reviewed calculators