弧の長さ計算機
円の扇形の弧の長さを計算します。
返済スケジュール
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時間経過による成長
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はじめに
Arc Length Calculator — Compute the arc length of a circle sector. Enter Radius, Central angle (degrees) to get an instant, accurate result.
計算式
Arc length = 2πr × (angle in degrees / 360), the fraction of the full circumference (2πr) swept by the central angle.
ステップごとの説明
- Enter the Radius.
- Enter the Central angle (degrees).
- Click Calculate to see your result instantly.
実例
Example: With Radius = 10, Central angle (degrees) = 90, the Arc Length Calculator gives Arc Length: 15.708.
よくある質問
What if the angle is 360°?
The arc length equals the full circumference of the circle.
What units is the result in?
The same linear unit as the radius you entered.
What inputs does the Arc Length Calculator need?
You'll need to provide: Radius, Central angle (degrees). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Arc Length Calculator?
The Arc Length Calculator applies the formula exactly as calculated — Arc length = 2πr × (angle in degrees / 360), the fraction of the full circumference (2πr) swept by the central angle. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the Arc Length Calculator free to use?
Yes, the Arc Length Calculator is completely free, requires no signup, and runs instantly in your browser.
弧の長さ計算機について
The Arc Length Calculator uses a real, verifiable formula — Arc length = 2πr × (angle in degrees / 360), the fraction of the full circumference (2πr) swept by the central angle. — so results are accurate every time, not an approximation.