Cone Surface Area Calculator
Calculate the total and lateral surface area of a cone from its radius and height.
Enter radius and height.
Cone Surface Area Formulas
Slant height: l = √(r² + h²)
Lateral SA = πrl
Total SA = πr(l + r)
Lateral SA = πrl
Total SA = πr(l + r)
Example: r = 3, h = 4 → l = 5
Lateral = π(3)(5) = 47.12 | Total = π(3)(8) = 75.40
Lateral = π(3)(5) = 47.12 | Total = π(3)(8) = 75.40
Related Calculators
Last updated: 2026-08-08