How it is calculated
Height is the perpendicular between the two bases, not the length of a sloping side.
V = πh / 3 × (R² + Rr + r²)
Where the numbers come from
- Lower radius
- Upper radius
- Height
Example
Radii 5 and 3, height 4. Volume π × 4 / 3 × (25 + 15 + 9) = 196π / 3.
Questions
Is the top larger than the bottom?
Yes, the formula is symmetric.
Is this a bucket?
Yes, if the bucket is round and the walls are straight in cross-section. Subtract the wall thickness from the radii yourself.
Lateral surface area?
Volume only, on this screen.