The Mass or Weight of an Oblate Spheroid calculator computes the volume of an oblate spheroid based on the semimajor(b) and semi minor (c) axis with the assumption that the spheroid is generated via rotation around the minor axis (see diagram).
INSTRUCTIONS: Choose your length units for a and b (e.g. feet, meters, lightyears), and enter the following:
 (b)  semimajor axis, the distance from the oblate spheroid's center along the longest axis of the spheroid
 (c)  semiminor axis, the distance from the oblate spheroid's center along the shortest axis of the spheroid
 (mD)  the mean density of the substance comprising the oblate spheroid.
Oblate Spheroid Mass / Weight: The mass (M) is returned in kilograms. However, this can be automatically converted to other mass and weight units (e.g. tons, pounds) via the pulldown menu.
The Math / Science
The oblate spheroid is an ellipsoid that can be formed by rotating an ellipse about its minor axis. The rotational axis thus formed will appear to be the oblate spheroid's polar axis. The oblate spheroid is fully described then by its semimajor and semiminor axes.
One important shape in nature that is close to (though not exactly) an oblate spheroid is the Earth which has a semiminor axis (c) which is the polar radius of 6,356 kilometers, and a semimajor axis (b) which is the equatorial radius of 6,378 kilometers. Consideration: what force would make the equatorial radius larger than the polar radius?
 Ellipsoid  Volume computes the volume of an ellipsoid based on the length of the three semiaxes (a, b, c)
 Ellipsoid  Surface Area computes the surface area of an ellipsoid based on the length of the three semiaxes (a, b, c)
 Ellipsoid  Mass or Weight computes the mass or weight of an ellipsoid based on the length of the three semiaxes (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 semiaxes (b, c)
 Oblate Spheroid Surface Area computes the surface area of an Oblate Spheroid based on the length of the two semiaxes (b, c)
 Oblate Spheroid Mass or Weight computes the mass or weight of an Oblate Spheroid based on the length of the two semiaxes (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)
Metals are materials characterized by its physical and chemical properties, primarily its ability to conduct electricity and heat, its luster or shine when polished, its malleability (ability to be hammered or pressed into shapes), and its ductility (ability to be drawn into wires). Metals typically have a crystalline structure and are found naturally in solid form (with the exception of mercury, which is a liquid at room temperature).
Metals Densities
 Density of Aluminum  2,700 kg/m^{3}
 Density of Brass  8,530 kg/m^{3}
 Density of Bronze  8,150 kg/m^{3}
 Density of Chromium  7190 kg/m^{3}
 Density of Cobalt  8746 kg/m^{3}
 Density of Copper  8,920 kg/m^{3}
 Density of Gallium  5907 kg/m^{3}
 Density of Gold  19,300 kg/m^{3}
 Density of Iron  7,847 kg/m^{3}
 Density of Lead  11,340 kg/m^{3}
 Density of Nickle  8908 kg/m^{3}
 Density of Palladium  12,023 kg/m^{3}
 Density of Platinum  21,450 kg/m^{3}
 Density of Steel  7,850 kg/m^{3}
 Density of Silver  10,490 kg/m^{3}
 Density of Titanium  4,500 kg/m^{3}
 Density of Tungsten  19,600 kg/m^{3 }
 Density of Uranium  19,050 kg/m^{3}
 Density of Zinc  7,135 kg/m^{3}
 Density of Zirconium  6,570 kg/m³

Metals make up a large portion of the periodic table of elements, with examples including iron, copper, gold, silver, aluminum, and titanium, among many others. Metals are essential in various industries such as construction, manufacturing, electronics, transportation, and energy production due to their unique properties and versatility.
Metals are generally dense materials. Density is a measure of how much mass is contained in a given volume. Metals tend to have high densities because their atoms are closely packed together in a crystalline structure. This close packing of atoms contributes to their characteristic properties such as strength, malleability, and conductivity.
However, it's important to note that the density of metals can vary widely depending on factors such as their elemental composition, crystal structure, and any impurities present. For example, some metals like lead and platinum are denser than others like aluminum or magnesium.
The Weight of Metal Calculator contains functions and data to compute the weight (mass) of metal objects based on their size, shape and the density of the metal. The Weight of Metal functions are:
 Cylinder Weight: Computes the weight (mass) of a cylinder based on the radius, length (height) and density of metal.
 Sphere Mass: Computes the mass (weight) of a sphere based on the radius and density of metal.
 Hemisphere Mass: Computes the mass (weight) of a hemisphere based on the radius and density of metal.
 Weight of Metal Bars: Computes the mass (weight) of a number of metal flats or metal bars based on the dimensions and density of metal.
 Weight of Metal Rods: Computes the mass (weight) of a number of metal rods based on the dimensions and density of metal.
For the mean densities of other substances click HERE.
Related Calculators
The following table contains links to calculators that compute the volume of other shapes: