Description

SG - specific gravity

Ratio of the liquid density to the water density at specific temperature

API

American Petroleum Institute gravity. It's a measure of how heavy or light a petroleum liquid is compared to water. If its API gravity is greater than 10, it is lighter and floats on water. If less than 10, it is heavier and sinks

Baumé

Density of the liquid in Baumé scale

v - specific volume

Specific volume of the liquid

ρ - Density

Liquid density - mass to volume ratio

Calculation setup

Select value to input. Calculator will give you all the rest

SG

input specific gravity

API

input liquid gravity in API degrees

Baumé

input density is Baume degrees

Lighter than water

Pressed if liquid is lighter than water - only if Baume is selected to input

When is this calculator suitable?

Specific gravity conversion calculator can be used for conversion between API degrees, Baume degrees and specific gravity and is applicable for all liquids, but most common application is for oils. Specific gravity is ratio of some liquid density divided by water density, at referenced temperature. As liquids are having different gravity on different temperature, for this calculator 60 degrees F (60 ⁰F; 15.6 ⁰C) is used as reference temperature - SG (60 ⁰F/60 ⁰F).

Calculator also calculates liquid density ρ in [lb/gallon] and specific volume v, in [barrels/MT] (barrels/metric tons) units.

Conversion in API degrees is for liquids with specific gravity lower than 1, which means for liquids lighter than water. Conversion in Baume degrees is for liquids with specific gravity higher or lower than 1, which means for liquids heavier or lighter than water.

Calculator description

Calculator use following equations for conversion between API and Baume degrees.

For oils specific gravity SG(60^OF/60^OF):

For liquids lighter than water SG(60^OF/60^OF):

For liquids heavier than water SG(60^OF/60^OF):

As the density of water at 15^OC is 999 kg/m³, density of oil or other liquid can be calculated as: water density x SG(60^OF/60^OF).