Calculadora de Grau para Radiano
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
radianos = graus × π / 180
About this calculator
The Degree to Radian Calculator is an online tool that instantly converts angles between degrees and radians. You enter the value in degrees or radians and get the equivalent in the other unit. The formula used is: radians = degrees × π / 180. The result is displayed with decimal approximation and also in exact form involving π when possible.
This calculator is useful for students and professionals working with trigonometry, physics, engineering, or any field that uses angles. For example, when solving sine, cosine, or tangent problems, many scientific calculators require angles in radians. It is also common in calculations of circular motion, waves, and periodic functions.
It is important to remember that 180 degrees equals π radians. When converting, make sure to use the correct value of π (approximately 3.14159) for accuracy. The tool handles positive and negative angles, as well as values greater than 360 degrees (or 2π radians), representing multiple full rotations.
Be careful with rounding: depending on the required precision, use appropriate decimal places. For theoretical calculations, the exact form with π is preferable. This calculator is practical for checking exercise results or converting quickly without manual errors.
Frequently asked questions
How do I manually convert degrees to radians?
Multiply the degree value by π and divide by 180. For example, 60° × π / 180 = π/3 radians.
Does the calculator accept negative angles?
Yes, the calculator accepts negative angles and converts them correctly to radians or degrees.
What is the difference between degree and radian?
A degree is a unit based on dividing a circle into 360 parts. A radian is based on the circle's radius: 1 radian is the central angle that subtends an arc equal in length to the radius.
Can I convert radians to degrees with this tool?
Yes, the calculator converts both ways. Just select the desired conversion direction.
Is the exact result with π shown?
Yes, whenever possible, the result is displayed in fractional form with π, in addition to the approximate decimal value.