GMFCS level explainer

The short answer

The GMFCS describes how a child with cerebral palsy moves, on five levels. Level I is walking without limits. Level V is being moved in a wheelchair by someone else. ¹

It says nothing about intelligence, speech, hand function, vision, hearing or learning. A child at level V may have typical intelligence. ²

The numbers, up front

What it measures: Self-initiated movement, focusing on what a child usually does at home, at school and in the community rather than their best performance in a clinic ¹
When it is assigned: Levels are described in age bands and the system is generally not applied with confidence before age 2 ¹
How stable it is: A child's level is generally stable from about age 2 onward, which is what makes it useful for planning ¹
What it does not measure: Intelligence, speech, hand function, vision, hearing or learning ²
Why it matters practically: It sets hip surveillance schedules, guides equipment decisions, and gives schools and insurers a shared starting point ²

This tool runs entirely in your browser. Nothing you type is sent anywhere, stored on any server, or seen by anyone including us. There is no analytics on this page. Nothing is saved when you close the page. You can check this yourself: turn off your internet connection and the tool still works.

What to do with the level

Get it in writing, with the date and who assigned it. Equipment funding and school services are often argued using this number.

Ask what hip surveillance schedule it puts your child on. ²

If your child is level IV or V, ask about powered mobility, including at what age a trial is possible. Evidence supports offering it early rather than as a last resort. ³

Ask whether the current therapy goals fit the level. It is a fair question and a good therapist will welcome it.

Put it in the written school plan, so services are argued from a shared starting point. ⁴

See GMFCS levels explained for the full page.

Questions parents ask

Can therapy change my child's level?

Levels are generally stable from about age 2, and therapy is not usually expected to change the level. ¹ That is not a reason to do less. Therapy changes how well a child does the things their level allows, how comfortable they are, and whether contractures and hip problems develop. None of those show up as a change in level.

My child walks at home but uses a wheelchair at school. What level is that?

That pattern is what levels II and III describe. The scale is about what a child usually does across settings, including distance and uneven ground, not about their best single performance. Using wheels for distance is part of the level. ¹

Does a high level mean intellectual disability?

No. The scale measures gross motor function and nothing else. Intelligence varies widely at every level, and children at levels IV and V are the ones most often underestimated, because movement and speech use overlapping muscles. ²

Words on this page, in plain English

GMFCS: The Gross Motor Function Classification System. A five-level scale that describes how a child with cerebral palsy moves. Level I is walking without limits. Level V is being moved in a wheelchair by someone else.
cerebral palsy: A group of lifelong conditions that affect movement and posture. They come from an injury or difference in the developing brain. The brain injury does not get worse over time, but the body effects can change.

See the full glossary and records decoder

Where these facts come from

CanChild, McMaster University. Gross Motor Function Classification System, Expanded and Revised (GMFCS-E&R). 2007. canchild.ca/en/resources/42-gross-motor-function-classificat. Link checked September 3, 2026.
National Institute of Neurological Disorders and Stroke. Cerebral Palsy. 2025. www.ninds.nih.gov/health-information/disorders/cerebral-pals. Link checked September 3, 2026.
Current Neurology and Neuroscience Reports. State of the Evidence Traffic Lights 2019: Systematic Review of Interventions for Preventing and Treating Children with Cerebral Palsy. 2020. pubmed.ncbi.nlm.nih.gov/32086598/. Link checked September 3, 2026.
U.S. Government Publishing Office, Electronic Code of Federal Regulations. 34 CFR Part 300, Assistance to States for the Education of Children with Disabilities. 2025. www.ecfr.gov/current/title-34/subtitle-B/chapter-III/part-30. Link checked September 3, 2026.