How many radians are in 90 degrees?
π ÷ 2 radians, approximately 1.57079633.
Angle Converter
无需注册即可在浏览器中免费使用Angle Converter，输入值仅在设备上处理。
计算在本地完成，我们不会把输入值发送到服务器。
示例
180 degrees equals π radians, 200 gradians, or half a turn.
计算方法
Angles normalize to radians. A full turn is 2π radians, 360 degrees, or 400 gradians.
重要说明
Displayed decimal radians approximate values involving π.
常见问题
What is a gradian?
A gradian divides a right angle into 100 parts and a full turn into 400.
Can angles be negative or exceed one turn?
Yes. The converter applies the same factor to any finite value.