Essential Guide to Wheelchair Ramp Angles

Wheelchair Ramp Angles

For people with disabilities and who rely on wheelchairs for mobility, having accessible homes and public spaces are important in making sure they have a semblance of self-sufficiency. One key element in achieving accessibility is the proper installation of ramps to ensure the safety and comfort of wheelchair users.

Continue reading below to know everything there is to know about wheelchair ramps, the essential aspects of wheelchair ramp angle, the importance of proper design, installation, and maintenance.

Understanding Wheelchair Ramp Angles

Ramp angles are an important consideration in designing and installing wheelchair ramps since the slope and incline of a ramp directly affect its usability and safety for wheelchair users.

As per the Americans with Disabilities Act (ADA), the standard angle for wheelchair ramp or maximum slope is 1:12, meaning that for every inch of rise, the ramp should extend 12 inches in length. 

1:12 Ratio

The 1:12 ratio is accepted as the standard because of its balance between usability and safety. This wheelchair ramp incline angle ensures the slope is gradual enough for easy navigation without having to require wheelchair users exert extra effort in maneuvering their wheelchair, minimizing the likelihood of accidents. With this ratio, manual and electric wheelchair users regardless of their upper body strength will still be able to use the ramp.

ADA Guidelines

Even if the widely accepted ratio for wheelchair ramps is 1:12, the ADA mentions that a ratio of 1:10 is still acceptable, especially for those with space limitations. Meaning a steeper slope of 1:10 is acceptable, provided the rise is 3 inches or 75 mm.

wheelchair ramp angle
Wheelchair Ramp Angles

Design Considerations

Aside from adhering to guidelines and standards, there are other design considerations that need to be factored in to ensure optimal functionality of the ramps and safety of the users.

Site assessment

Before designing a wheelchair ramp or even if installing one is recommended since you can rent a wheelchair ramp instead especially if it will not be used frequently, checking the space is important. You want to check first if you have the available space, the height of the rise and the surrounding space all play a role in determining the type of ramp, the slope and the angle. Checking the site also helps identify potential issues and will allow for a more customized solution.

Ramp length

The length of the ramp must be proportional to the ramp angle. You can use an online wheelchair ramp calculator to best determine the specifications for your ramp. Longer ramps must have a gentler slope to be more wheelchair-user friendly. When planning the length of the ramp, consider not only the rise or the slope but if there are future plans for expansions.

Space constraints

If you don’t have the space for a ramp, there are other alternative solutions such as platform landings or a step. If you have no idea what a wheelchair step is, read more here about wheelchair ramp vs wheelchair steps. Considering these alternatives will ensure that even if you don’t have the space for it, accessibility is not compromised. It’s recommended to collaborate with mobility experts such as Gilani Mobility when deciding which innovative accessibility solution is best for your limited space.

Safety Measures

Ensuring the safety of the wheelchair user when wheeling up and down the ramp is paramount when designing and installing it. To ensure the ramp you’re designing is up to standard, refer to the below wheelchair ramp slope chart.

wheelchair ramp slope chart
wheelchair ramp slope chart to decide wheelchair ramp angles | (image credit: Allegro Medical)

Aside from ensuring the ramp length and ramp incline is following ADA guidelines, other proper safety measures must be considered such as:

Installation of handrails

ADA guidelines recommend installation of handrails on both sides of the wheelchair ramp. The specifications for the handrails must comply with standards for maximum support and stability.

Anti-slip surfaces

Ramps should not only adhere to the required wheelchair ramp width but must also have anti-slip surfaces to prevent accidents, especially external ramps during adverse weather conditions. The surface material should be durable, easy to clean, and could accommodate the weight of most electric, manual wheelchair and other mobility aids.


Regular maintenance is essential to ensure the longevity and continued functionality of wheelchair ramps. Neglecting maintenance can lead to safety hazards and compromise the accessibility of the space especially if it’s a wheelchair ramp slope for home use which will significantly impact the quality of life of the wheelchair user.


Prompt repairs are necessary when issues are already noticed. Whether fixing loose handrails, replacing damaged surface materials or structural concerns, timely repairs ensure overall safety and reliability of the ramp.


What is the best angle for a wheelchair ramp?

According to the ADA guidelines, the best angle for a wheelchair ramp is 1:12.

What are standard ramp angles?

Standard ramp angles for wheelchair accessibility adhere to guidelines set by ADA. The maximum slope for a wheelchair ramp is 1:12 which ensures a gradual incline.

What is the maximum slope of a ramp?

The recommended maximum slope of a ramp for wheelchairs is 1:12, and 1:20 for car ramp slope, ambulance ramp or any type of vehicle.

How do you calculate ramp angle?

To easily calculate ramp angle, you can use an online ramp calculator. With this, you can guarantee that you’d get the correct specification.

What is the formula for ramp?

The formula for calculating ramp is: Slope expressed as a percentage = (h/d) x 100

How long should a ramp be for 2 steps?

The length of a ramp for two steps depends on the height of each step and the desired slope. If each step has a rise of 7 inches, the ramp should ideally be at least 14 feet long for a gradual incline.