Cone Calculator
Compute a cone's volume, surface area and slant height from radius and height.
Input Data
Radius
Height
Results
Computed volume and surface area.
37.699
Explanatory note about the result.
體積 = (1/3)πr²h = 37.699；表面積 = πr²+πrℓ = 75.398（ℓ=5）。
At a glance:l = √(r²+h²); V = (1/3)πr²h; lateral area = πrl; total area = πr(l+r). Complements cone-volume and cylinder.
Formula
l = √(r²+h²).
V = (1/3)πr²h.
A = πr(l+r).
How to Use
- Enter radius and height.
- The tool returns volume and area.
Case Studies
r=3, h=4
l=5; V=12π≈37.7; A=π·3·8=24π≈75.4.
FAQ
What is slant height?
The distance from apex to rim along the side, √(r²+h²).
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.