Size of Hail in the Bible (Revelation 16)

This calculator computes the radius of an ice sphere based on the sphere's weight  and the density of ice.

In the Bible, Revelation 16:17-21 speaks of a hailstorm that will occur after the pouring of the final seventh vial of judgment. Revelation 16:21 says, “And there fell upon men a great hail out of heaven, every stone about the weight of a talent…”

A talent was a unit of measurement for weighing precious metals like silver and gold and weighed about 75 pounds.  The constant for a talent is found HERE .  The constant for the density of ice may be found HERE.

The Math / Science

The formula for the mass of a sphere:

    M = 4/3⋅π⋅r³⋅mD

where:

• M is the mass of the sphere
• r is the radius of the sphere
• mD is the mean density of the material

so this equation solves for r.

See the mean density (ρ) of many common substances

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

A word on Mass and Weight

Converting from mass to weight is trivial under the right conditions.  Fortunately those conditions are generally true anywhere on the surface of the Earth, so the conversions built into the vCalc unit conversion engine can be assumed to be fairly accurate unless you require weight at very high altitudes or in space.