Angle Converter

How it is calculated

Enter an angle and choose its unit: degrees, radians or gradians. The engine converts it to degrees first (deg = rad × 180 ÷ π, or deg = grad × 0.9), then shows all three: rad = deg × π ÷ 180 and grad = deg ÷ 0.9. A full circle is 360 degrees, 2π (about 6.28) radians or 400 gradians.

All three results are rounded to two decimals, which matters for radians: a value such as 0.7854 is shown as 0.79. If you need radians for further calculation, use π-based fractions instead of the rounded display. Negative angles and values beyond a full turn are converted as given, not wrapped to 0–360. An unrecognised unit gives no result.

Common mistakes

• Giving degrees to a function that expects radians. Most programming languages' sin and cos need radians; convert first.
• Typing π as 3.14 in another tool and then comparing to the 2-decimal radian shown here. The display is rounded.
• Leaving the unit on degrees when the number is in radians; 1 would then be read as 1 degree.
• Confusing gradians (400 per circle) with degrees (360). A right angle is 100 grad, not 90.
• Expecting angles to wrap: 450 degrees is shown as 450, not 90.