Slope, Grade & Angle Converter

What is a Slope, Grade & Angle Converter?

Convert slope measurements between Slope Ratio (`Rise : Run`), Grade Percentage (`%`), Angle Degrees (`°`), Radians (`rad`), and Roof Pitch (`x:12`).

Why Use This Tool?

  • Civil Engineering & Construction: Calculate road grades, wheelchair ramp slopes (ADA 1:12 ratio), and drainage slopes.
  • Roofing & Architecture: Convert roof pitch ratios (e.g. `4:12`) to angle degrees (°).
  • Topography & Hiking: Convert grade incline percentages on maps to slope angles.

How to Use

  1. Enter value in any field (Grade %, Angle Degrees, Rise, Run, or Pitch).
  2. The converter calculates all remaining slope representations simultaneously.
  3. Copy the converted slope measurement.

Real Working Example

Input:

Grade: 10% (10 ft rise per 100 ft run)

Output Result:

Angle Degrees: 5.71° | Radians: 0.10 rad | Slope Ratio: 1:10 | Roof Pitch: 1.2:12

Important Technical Details & Formulas

  • Trigonometric Slope Formulas: `Angle = arctan(Rise / Run)` and `Grade % = (Rise / Run) * 100`.
  • ADA Compliance Reference: Includes ADA ramp maximum 8.33% grade (1:12 slope ratio) reference marker.
  • Client-Side Engine: Fast trigonometric calculation in browser memory.

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Frequently Asked Questions

How do you convert grade percentage to angle degrees?

Angle Degrees = arctan(Grade Percentage / 100) converted from radians to degrees.

What is the maximum ADA compliant wheelchair ramp slope?

ADA standards require a maximum slope ratio of 1:12 (8.33% grade or 4.76° angle).

Is it free?

Yes, 100% free.

Can it calculate roof pitch?

Yes, roof pitch in inches per 12 inches (x:12) is calculated automatically.

What is the main function of Slope, Grade & Angle Converter?

Convert between slope ratio (rise/run), grade percentage (%), and angle degrees (°), radians, and pitch. This converter transforms slope, grade & angle data formats locally without server uploads.

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