Wheelchair Ramp Calculator

Calculate ADA-compliant wheelchair ramp length, landings, and handrail requirements based on rise height.

Rise (inches)

Slope Ratio (1:X)

Landing Every (ft)

Tab to move between fields

Ramp Run Length (ft)

Total Length with Landings (ft)

Landings Required2

Total Handrail Length (ft)52

How to Use This Calculator

Enter the total vertical Rise (inches) the ramp must overcome — measure from the lower landing to the upper floor level.
Set Slope Ratio (1:X) to 12 for ADA compliance (the default); lower values create steeper ramps only acceptable for temporary use.
Set Landing Every (ft) to 30 ft to match ADA requirements; reduce if space is constrained.
Review Ramp Run Length (ft) — this is the horizontal distance the ramp will occupy.
Check Landings Required to confirm how many 5 ft level rest areas are needed.
Use Total Handrail Length (ft) to order handrail material; required on both sides when rise exceeds 6 inches.

How the result changes with Rise (inches)

Rise (inches)	Ramp Run Length (ft)	Total Length with Landings (ft)
36	36	51
126	126	156
234	234	279
324	324	384

Rise (inches): Total vertical rise the ramp must cover in inches
Slope Ratio (1:X): ADA maximum is 1:12 (1 inch rise per 12 inches run). Lower values = steeper.
Landing Every (ft): ADA requires a level landing every 30 feet of ramp run

Identify Input Parameters
Rise (inches) = 24, Slope Ratio (1:X) = 12, Landing Every (ft) = 30 = 3 input(s) provided
Calculate Ramp Run Length
24 = 24
Calculate Total Length with Landings
Total Length with Landings
34 = 34
Calculate Landings Required
Landings Required
2 = 2
Calculate Total Handrail Length
Total Handrail Length
52 = 52