True Specific Gravity Formula

Equation for calculate true specific gravity is,

G_t = (W₂ - W₁) / (W₃ - W₁) - (W₄ - W₂)

Where,
G_t= True Specific Gravity
W₁ = Weight of S.G Bottle
W₂ = Weight of S.G Bottle + Powdered Sample
W₃ = Weight of S.G Bottle + Water
W₄ = Weight of S.G Bottle + Water + Powdered Sample