以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Choose a shape.
- Enter the dimensions in one consistent unit.
- Volume is in cubic units and surface area in square units of what you entered.
計算式
Volumes of prisms and cylinders are base area × height; pyramids and cones are one third of that.
Cylinder: V = πr²h
Sphere: V = (4/3)πr³, S = 4πr²
Cone: V = (1/3)πr²h
Pyramid: V = (1/3) × l × w × h
Frustum: V = (1/3)πh(R² + Rr + r²)
Example
- Cylinder with radius 2 and height 5.
- V = π × 4 × 5 ≈ 62.832 cubic units.
- Surface = 2π × 2 × (2 + 5) ≈ 87.965 square units.
よくある質問
How do I convert cubic feet to gallons?
1 cubic foot ≈ 7.48052 US gallons. Use the volume converter for other units.
How much concrete do I need?
Use the concrete calculator, which converts slab, footing and column volumes into cubic yards or meters and bags.
What is a frustum?
A cone with its top cut off parallel to the base, such as a bucket or lampshade.