Cone Lateral Surface Area Rekenmachine

Calculates the lateral surface area of a cone (side surface, excluding base).

Measure or calculate the base radius Then: Determine slant height (or calculate from height) Then: Apply the lateral area formula Then: Add base area if total surface area needed.

Example: Input Radius: 5 cm, Slant Height: 13 cm gives a result of Lateral Area ≈ 204.2 cm² (Different from total surface area which includes base).

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

Our Cone Lateral Surface Area Rekenmachine uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.