球の体積計算機

共有リンク

はじめに

Sphere Volume Calculator — Volume and surface area of a sphere. Enter Radius to get an instant, accurate result.

計算式

Volume = (4/3)πr³. Surface area = 4πr².

ステップごとの説明

Enter the Radius.
Click Calculate to see your result instantly.

実例

Example: With Radius = 5, the Sphere Volume Calculator gives Volume: 523.5988, Surface Area: 314.1593.

よくある質問

How sensitive is volume to radius?

Very — volume scales with the cube of the radius, so doubling the radius multiplies the volume by 8.

What if I only know the diameter?

Divide it by 2 to get the radius before entering it.

What inputs does the Sphere Volume Calculator need?

You'll need to provide: Radius. 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 Sphere Volume Calculator?

The Sphere Volume Calculator applies the formula exactly as calculated — Volume = (4/3)πr³. Surface area = 4πr². — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Sphere Volume Calculator free to use?

Yes, the Sphere Volume Calculator is completely free, requires no signup, and runs instantly in your browser.