Specific Gravity (specific weight)

S G = \frac{γ}{γ_{W}}

$SG = gamma / gamma_W$

Specific Weight

$"Specific Weight"$

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The Specific Gravity calculator computes the Specific Gravity (SG) based on the ratio of the specific weight of a substance to the specific weight of water under standard conditions.

Standard temperature and pressure (STP) is defined as $0^{\circ}$ $0^@$ C and 100kPa pressure. And the specific weight of water is 9789.030391945 kg/(m²·s²). Note the specific gravity of water can vary as a function of temperature and pressure.