ADA Ramp Incline Calculator

Incline Formula:

\[ \text{Incline} = \arctan\left(\frac{\text{rise}}{\text{run}}\right) \]

Incline Angle (degrees):

Definition: This calculator determines the incline angle of a ramp based on its rise (vertical height) and run (horizontal length).

Purpose: It helps designers and builders ensure ramps meet ADA (Americans with Disabilities Act) accessibility requirements.

The calculator uses the formula:

\[ \text{Incline} = \arctan\left(\frac{\text{rise}}{\text{run}}\right) \]

Where:

Explanation: The arctangent function converts the rise/run ratio into an angle measurement.

Details: ADA requires a maximum slope of 1:12 (4.76°). Proper incline ensures wheelchair accessibility and safety.

Tips: Enter the rise (vertical) and run (horizontal) measurements in inches. Both values must be > 0.

Q1: What is the maximum ADA compliant slope?
A: 1:12 slope (1 inch rise per 12 inches run), which equals approximately 4.76 degrees.

Q2: How do I measure rise and run?
A: Rise is the vertical height change. Run is the horizontal length of the ramp.

Q3: What if my calculated angle exceeds 4.76°?
A: You'll need to increase the run length or decrease the rise to meet ADA requirements.

Q4: Does this include landing requirements?
A: No, ADA also requires level landings at top, bottom, and intervals - consult full ADA guidelines.

Q5: Can I use different units?
A: The calculator uses inches, but any consistent units will give correct angle results.