体積の計算機

立体を選び、寸法を入力して「計算」を押してください。

結果

値を入力して「計算」を押すと結果が表示されます。

公式

V_{\text{cylinder}} = \pi r^2 h

Area of the circular base times the height.

V_{\text{cone}} = \tfrac{1}{3}\pi r^2 h,\quad V_{\text{sphere}} = \tfrac{4}{3}\pi r^3

A cone holds one third of the matching cylinder.

この計算ツールの使い方

Choose the solid; the inputs change to match it.
Enter the measurements in one unit; the answer is in that unit cubed.

解き方付き例題

Cylinder with radius 3 and height 5

V = π × 3² × 5 = 45π ≈ 141.371669 cubic units.

よくある質問

Why is the answer written with π?

It is the exact value. The rounded decimal is shown underneath.

Radius or diameter?

Use the radius — half the diameter.

詳しく学ぶ