Slope Percentage Calculator

Calculate the steepness of any surface with these steps:

Step 1: Enter the "Rise" (the vertical distance or height change).

Step 2: Enter the "Run" (the horizontal distance traveled). Ensure both measurements are in the same units (e.g., both in feet or both in meters).

Step 3: Click "Calculate."

Step 4: Review the results. The calculator will provide: - The Slope Percentage (Grade). - The Slope as a decimal. - The Angle of the slope in degrees. - A description of the steepness (e.g., "Gentle," "Moderate," "Steep").

Step 5: Use this to check if a ramp meets ADA requirements (maximum 8.33%) or to calculate a road's grade.

The slope percentage (also called the grade) is calculated as: Slope % = (Rise / Run) × 100

Detailed Logic: 1. Divide the vertical change (rise) by the horizontal change (run). This gives you the slope as a decimal ratio. 2. Multiply by 100 to express it as a percentage. 3. (Optional) To find the angle in degrees, use the arctangent function: Angle = arctan(Rise / Run).

Example: A road rises 5 meters over a horizontal distance of 100 meters. Slope % = (5 / 100) × 100 = 5% grade.

The Slope Percentage Calculator is a vital tool for civil engineers, architects, and outdoor enthusiasts. In construction, slope percentage dictates the safety and accessibility of structures—for instance, the Americans with Disabilities Act (ADA) has strict limits on ramp steepness to ensure safety. For drivers and cyclists, road grades (like a '6% grade') indicate how much strain will be placed on the engine or legs. By converting raw dimensions into a standard percentage, this tool makes it easy to compare steepness across different projects and ensures compliance with building codes and safety standards.