The Surface Area of a Sphere calculator computes the surface area of 
a sphere based on its radius (r).
INSTRUCTIONS: Choose units and enter the following:
- (r) the radius of the sphere.
Sphere Surface Area (A): The Surface Area of the Sphere is returned in square meters (m2). However, this can be automatically converted into other area units (e.g. square feet, acres) via the pull-down menu.
The Math/Science
The formula for the surface area of a sphere is:
A = 4π•r²
where:
- A is the surface area of the sphere
- r is the radius of the sphere
Sphere Calculators
- Sphere Surface Area based radius (r)
- Sphere Surface Area from Volume
- Sphere Volume from Radius
- Sphere Volume from Circumference
- Sphere Volume from Surface Area
- Sphere Volume from Mass and Density
- Sphere Radius from Volume
- Sphere Radius from Surface Area
- Sphere Weight (Mass) from volume and density
- Sphere Density
- Area of Triangle on a Sphere
- Distance between Two Points on a Sphere
- Sphere Cap Surface Area
- Sphere Cap Volume
- Sphere Cap Weight (Mass)
- Sphere Segment Volume
- Sphere Segment Weight (Mass)
- Sphere Segment Wall Surface Area (without the circular top and bottom ends)
- Sphere Segment Full Surface Area (with the top and bottom circles, aka ends)
- Volume of Spherical Shell
- Mass of Spherical Shell
Ellipsoid Calculator
Ellipsoid - Volume computes the volume of an ellipsoid based on the length of the three semi-axes (a, b, c)- Ellipsoid - Surface Area computes the surface area of an ellipsoid based on the length of the three semi-axes (a, b, c)
- Ellipsoid - Mass or Weight computes the mass or weight of an ellipsoid based on the length of the three semi-axes (a, b, c) and the mean density.
- Ellipsoid Cap - Volume computes the volume of a section of an ellipsoid.
- Oblate Spheroid - Volume computes the volume of an Oblate Spheroid based on the length of the two semi-axes (b, c)
- Oblate Spheroid- Surface Area computes the surface area of an Oblate Spheroid based on the length of the two semi-axes (b, c)
- Oblate Spheroid- Mass or Weight computes the mass or weight of an Oblate Spheroid based on the length of the two semi-axes (b, c) and the mean density.
- Sphere - Volume computes the volume of a sphere based on the length of the radius (a)
- Sphere - Surface Area computes the surface area of a sphere based on the length of the radius (a)
- Sphere - Mass or Weight computes the mass or weight of a sphere based on the length of the radius (a) and the mean density.
- Circular - Volume: Computes the volume of a column with a circular top and bottom and vertical sides.
- Circular - Mass: Computes the mass/weight of circular volume based on its dimensions and mean density.
- Elliptical Volume: Computes the volume of a column with an elliptical top and bottom and vertical sides.
- Elliptical - Mass: Computes the mass/weight of an elliptical volume based on its dimensions and mean density.
- Ellipse Vertical Chord from Edge (VE): Computes the length of the vertical chord of an ellipse based on distance from the edge.
- Ellipse Vertical Chord from Center (VC): Computes the length of the vertical chord of an ellipse based on distance from the center.
- Ellipse Horizontal Chord from Edge (HE): Computes the length of the horizontal chord of an ellipse based on distance from the edge.
- Ellipse Horizontal Chord from Center (HC): Computes the length of the vertical chord of an ellipse based on distance from the center.
- Common Mean Density: Provides a lookup function to find the mean density of hundreds of materials (woods, metals, liquids, chemicals, food items, soils, and more)
References
- Light and Matter(Dr. Benjamin Crowell) Chapter 1.4 Order of Magnitude Estimates
