Specific Gravity Calculator Post author:subathra Post published:October 13, 2020 Post category:Aerospace Calculator / Composite Materials / Fluid Mechanics Calculator Specific Gravity Equation The specific gravity is the ratio between the density of a substance and a reference substance(water). You Might Also Like Pressure Altitude Calculator by Mohit Kudal February 21, 2021 Polytrophic Index (n) Calculator October 31, 2020 Geopotential height October 14, 2020