Convert degrees, radians, gradians and turns

Students, surveyors and engineers use it to move among degrees, radians, gradians and turns during orientation or geometry work.

Convert degrees, radians, gradians and turns. Everything runs in your browser, so the values you enter are never uploaded, shared, or stored.

How to use

Enter the angle value you want to convert on the first line of the field.
Set the source unit to deg, rad, grad or turn.
Choose the target unit on the following line, based on the result you need.
Run convert to get the equivalent value on the page.
Check the result and keep the minus sign if the angle was negative.

Example

To change one hundred and eighty degrees into radians, enter the value, set the source as deg and the target as rad. The tool shows the equivalent. This is handy in trigonometry, surveying or any orientation calculation. Always confirm the unit your formula expects.

Input

180
deg
rad

Output

180 deg = 3.14159265359 rad

Limits and formats

It does not draw the angle or check its position on a coordinate system.
Unit names must be written exactly as offered by the tool, or the conversion will not work.
A negative value must be read according to the rotation direction you use.
The answer is a mathematical conversion, not a field measurement.
Rounding too early can let a small error grow in later calculations.

Where processing happens

The conversion happens in your browser. The value and units you choose stay on your device, with nothing sent away. The equivalent appears on the page right after conversion, ready to copy into your work.

Frequently asked questions

What is the difference between degrees and radians?

Degrees split a full turn into three hundred and sixty parts, while radians describe an angle through arc length. Radians are common in calculus, physics and graphics programming. The best choice depends on the convention used by your project.

Can I convert a negative angle?

Yes. Type the value with a minus sign. The result keeps that direction. Then confirm whether your project treats positive angles as clockwise or counterclockwise before using it, because the sign changes the meaning.

When are gradians or turns useful?

Gradians appear in some surveying and civil engineering traditions, and turns make rotation calculations easy. The converter lets you move between those conventions without manual formulas, which reduces the chance of a unit mistake.