![]() However, if the value of API gravity is less than 10, it implies that the liquid is heavier than water and will sink. If the API gravity of a liquid is greater than 10° API, the liquid will float on water. The behavior of the crude products in water is judged based on this parameter. The API gravity for pure water in that case will be: The API gravity is often compared with water such that, the relative density of heavy oil at 60☏ is taken as 1.0, the same value as for pure water. Therefore, one can directly calculate API gravity from density. Where the density of water is taken as 999 kg/m³. The specific gravity of the liquid can be estimated from its density the same way as in our specific gravity calculator using the equation below: However, it is often used with a degree symbol, such as the degree of API gravity (° API). Key words: air-saturated water calibra- tion density of water isothermal compressibility ITS-90 volumetric standards. The API gravity parameter is dimensionless, based on the equation. The equations are to be used to calculate the density of water, in the temperature range 5 to 40 C on ITS-90, used in the gravimetric determina- tion of the volume of volumetric standards. The above equation can also be called the specific gravity to the API conversion formula. The API gravity of a crude product is related to the specific gravity using the equation: ![]() Just simply enter value 1 in Water Density and see the result in Gram/Liter. Feel free to use our online unit conversion calculator to convert the unit from Water Density to Gram/Liter. The specific gravity is then used in the API gravity formula. The answer is one Water Density is equal to 1000 Gram/Liter and that means we can also write it as 1 Water Density 1000 Gram/Liter. To find the API gravity of a liquid, initially, the relative density is calculated using a hydrometer or an oscillating U-tube conforming to industry standards ASTM D1298 or D4052. Freezing water expands over 9 by volume and ice floats on water because it is lighter. At 4 degrees Celsius pure water has a density of 1g/mL or 1kg/L and a specific gravity of 1. The density of water varies according to temperature and the degree of purity. The API gravity is calculated based on the specific gravity of the liquid. Density of pure water is a constant at a certain temperature not depending on sample. The term API in API gravity stands for American Petroleum Institute, with reference to the institution that developed it. The API gravity is a measure of the heaviness of crude oil products when compared with water.
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