Grade to Angle Converter

This converter treats grade as a slope percentage, not the angular unit sometimes called a gradian or gon. A slope grade is rise divided by horizontal run, multiplied by 100.

To convert a percent grade to an angle, the calculator first divides the grade by 100, then applies the inverse tangent function.

Formula: angle = arctan(grade / 100). For example, a 6% grade is arctan(0.06), which equals about 3.43°.

Enter the signed percent grade exactly as measured or posted.

Use the degree result for angle-based diagrams, the radian result for trigonometric formulas, and the rise-per-100 output when you need a practical field interpretation.