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角度转换器
免费的角度转换器 — 度、弧度、梯度(百分度)和圈。适用于数学、物理、导航和CAD工作。在您的浏览器中运行。
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编辑注
Understanding · Degrees and radians.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›How do I convert degrees to radians?
Multiply degrees by π/180 (≈ 0.01745). So 90° = π/2 ≈ 1.5708 rad. Or just type it here.
›What's a gradian?
A gradian (or 'gon') is 1/400 of a full circle. Used by surveyors so that a right angle is exactly 100 gon — easier mental math.
›Why use radians instead of degrees?
Because 1 radian is the angle that makes the arc length equal to the radius — calculus formulas (sin, cos derivatives) only work cleanly in radians.
›Is the converter free?
Yes — free, no signup, runs in your browser.
›How precise is it?
Double-precision (15+ significant digits) — exact to whatever precision your calculation needs.
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