Figure

Shapes and geometry

Cones

Calculate cone volume and lateral area from circle size and perpendicular height.1

A circular cone’s volume uses its base circle and perpendicular height. Lateral area is the curved surface and excludes the base. The height entered into the mode is not the slant length along the side.

Cone volume and lateral area

Use diameter or radius and perpendicular height. Read cone volume, then lateral area.

Start a new calculation

Use 2nd if a unit is above its button.

  1. Start fresh

    Press Clear entry, then Clear entry.

  2. Press the keys

    Press Select length units.

Open Cone

Skip if this mode is already open. Skip Close if no mode is open.

  1. Press Close calculation mode, then Second, then Open Cone.

Enter and calculate

  1. Diameter

    Press 3, then feet, then 6, then inches, then Store diameter.

  2. Height

    Press 5, then feet, then Store height.

  3. Complete the value

    Press Equals.

Results in orderPress = to continue

  1. Cone volume16.03521 cubic feet
  2. Cone lateral area29.12401 square feet
  3. Cone volume again16.03521 cubic feet

Keep in mind

Lateral area excludes the base. Add the circular base area separately for a closed cone.

Display assumptions

  1. Area units: Automatic; Volume units: Automatic. ↩

Keep the guide beside your calculation.

These examples are built into Figure. Open Help while you calculate, then return to the same guide and reading position.

See Help in Figure →