What Is the ADA Ramp Calculator?
Design ADA-compliant ramps with proper slope ratios, landing dimensions, and handrail requirements. The Americans with Disabilities Act requires specific ramp geometry to ensure wheelchair accessibility. This calculator verifies your design meets ADA 405 and ICC A117.1 standards.
How to Use This Calculator
- Enter the total rise (height change) the ramp must cover.
- The calculator determines the required ramp length at the 1:12 maximum slope.
- Review landing requirements at top, bottom, and any intermediate turns.
- Check handrail extension and edge protection requirements.
Why Accurate ADA Ramp Calculations Matter
ADA non-compliance can result in lawsuits, fines, and costly retrofits. The maximum slope for an ADA ramp is 1:12 (8.33%), with landings required at the top, bottom, and every 30 inches of rise. Handrails are mandatory on both sides for any ramp rise exceeding 6 inches.
Building Code References
Related Tools
Frequently Asked Questions
What is the maximum slope for an ADA ramp?+
The maximum running slope is 1:12 (one inch of rise for every 12 inches of run), which equals 8.33% or about 4.76 degrees.
Do ADA ramps need handrails?+
Yes, handrails are required on both sides of any ramp with a rise greater than 6 inches. Handrails must be 34 to 38 inches high and extend 12 inches beyond the top and bottom of the ramp.