Oloid enclosed Volume
Celsius <-> Rømer
Brinell Hardness Number
Backlash (due to tooth thickness changes)
Radiant exposure (photography)
Compartmental SIR model in epidemiology (basic reproduction number)
Relation between the standard deviation of logarithmized sample and the non-logarithmized sample values
Area of a Torus
Cyclic quadrilateral circumradius ( Parameshvara's formula )
Gaussian beam ( radius of curvature )