Radians to Degrees Calculator

How it is calculated

Enter the angle in radians as a plain decimal number. One half turn is π radians and also 180°, so the conversion factor is 180 ÷ π ≈ 57.2958: deg = rad × 180 ÷ π. The result is in degrees, shown to 4 decimal places. The tool does not try to wrap the angle into 0°–360°, so 7 rad gives 401.0705° rather than 41.0705°, and negative values keep their sign. Zero gives 0.0000. An empty box gives no result. Type π as a number: enter 3.14159265 rather than the symbol or the text 'pi'. Because the input is a rounded decimal, a value such as 1.5708 gives 90.0002° and not exactly 90°.

Common mistakes

• Multiplying by π ÷ 180 instead of 180 ÷ π. That is the opposite conversion, and it turns 2.5 into about 0.0436, not 143.24.
• Typing a degree value into the radians box. Entering 90 means 90 radians, which is 5,156.6202°, not a right angle.
• Expecting the angle to be reduced to a single turn. 7 radians is shown as 401.0705°, so subtract 360° yourself if you want 41.0705°.
• Entering π as a rounded number and expecting an exact result. 3.14 gives 179.9087°, not 180°; use more decimals, such as 3.14159265.
• Typing text such as 'pi/2' or 1/2. The box needs a decimal number, so type 1.5707963 for π/2.