Wheelchair Ramp Length Calculator

Plan compliant accessible entry routes with the Wheelchair Ramp Length Calculator. Estimate your Required Ramp Length using Vertical Rise and Slope Ratio to ensure safety and adherence to building codes. Perfect for homeowners building porch ramps, contractors verifying site feasibility, or facility managers planning renovations. This tool simplifies complex geometry into actionable measurements for any project.

Enter the height difference in inches that the ramp needs to overcome
Select the appropriate slope ratio based on your needs and local regulations
Standard ADA requirement for resting areas

How Required Ramp Length Is Calculated

Required Ramp Length represents the horizontal distance your ramp must cover to connect two different heights safely. To find this, you must know the total vertical rise and select a slope ratio that meets safety standards.

Ramp Run = Vertical Rise × Slope Ratio

Key Steps:

  1. Measure the vertical rise from the ground to the entry point.
  2. Select a slope ratio, such as 1:12 for ADA compliance.
  3. Multiply the rise by the ratio to get the total run length.

This method ensures the incline is gentle enough for wheelchair users to navigate without excessive strain while helping you utilize available space efficiently.

What Your Required Ramp Length Means

Your result represents the minimum horizontal distance required for a safe, code-compliant structure. You must use this number to map out the ramp's footprint in your yard or building plan.

Common Ramp Scenarios

  • ADA Compliance: For a standard 1:12 slope, a 24-inch rise requires a 24-foot ramp run. This ensures access for unassisted wheelchair users.
  • Easy Access: Using a 1:20 slope creates a very gentle incline. This is ideal for resting areas or assisted use but requires significantly more space.
  • Space-Saving: A 1:8 slope is only suitable for short rises, like a 6-inch threshold, where space is extremely limited.

Important: If your calculated run exceeds 30 feet, you must include level intermediate landings. These platforms provide a resting spot and comply with safety regulations.

Disclaimer: This tool provides estimates for planning purposes only. Local building codes and zoning laws may vary, so always consult a licensed contractor or architect before beginning construction.

Check your measurements twice against the physical site to ensure accuracy before purchasing materials.