SG of a fluid has the same numerical value as its density expressed in g/mL or Mg/m 3. Since Specific Gravity - SG - is dimensionless, it has the same value in the SI system and the imperial English system (BG). It is common to use the density of water at 4 oC (39 oF) as a reference since water at this point has its highest density of 1000 kg/m 3 or 1.940 slugs/ft 3. Ρ H2O = density of water - normally at temperature 4 oC Ρ substance = density of the fluid or substance Specific Gravity (Relative Density) - SG - is a dimensionless unit defined as the ratio of the density of a substance to the density of water - at a specified temperature and can be expressed as How to measure density of liquid petroleum products.Air - Density, Specific Weight and Thermal Expantion Coefficient - variation with temperature and pressure, SI and Imperial units.Water - Density, Specific Weight and Thermal Expantion Coefficient - variation with temperature at 1, 68 and 680 atm, SI and Imperial units.Density is a physical property - constant at a given temperature and pressure - and may be helpful for identification of substances.īelow on this page: Specific gravity (relative density), Specific gravity for gases, Specific weight, Calculation examples On atomic level - particles are packed tighter inside a substance with higher density. See also Unit converter - mass and Unit converter - density Slugs can be multiplied with 32.2 for a rough value in pound-mass (lb m). Note that there is a difference between pound-force (lb f) and pound-mass (lb m). The Imperial (U.S.) units for density are slugs /ft 3 but pound-mass per cubic foot - lb m /ft 3 - is often used. What is weight and what is mass ? - the difference between weight and mass.Mass is a property and the SI unit for density is. Thermal properties of water at different temperatures like density, freezing temperature, boiling temperature, latent heat of melting, latent heat of evaporation, critical temperature and more.Density is defined as mass per unit volume. Online calculator, figures and tables showing Specific Volume of water at temperatures ranging from 0-370 ☌ and 32 - 700 ☏ - Imperial and IS Units. Temperatureįigures and tables showing the enthalpy and entropy of liquid water as function of temperature - SI and Imperial Units. Water - Density, Specific Weight and Thermal Expansion Coefficientsĭefinitions, online calculator and figures and tables with water properties like density, specific weight and thermal expansion coefficient of liquid water at temperatures ranging 0 to 360☌ (32 to 680☏). Properties of the US standard atmosphere ranging -5000 to 250000 ft altitude. The definition of STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure. STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air Water Content and Temperatureĭensity of the mix of dry air and water vapor - moist humid air. Pressure, temperature and volume in a perfect ideal gas like moist air (air with water vapor).ĭensity of moist air vs. Online density converter with commonly used units. Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more. Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 ☌ (-140 to 2900 ☏) at atmospheric and higher pressure - Imperial and SI Units.ĭry air is a mixture of gases where the average molecular weight (or molar mass) can be calculated by adding the weight of each component. Pressure and TemperaturesĪir density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures.Īir - Density, Specific Weight and Thermal Expansion Coefficient vs. Altitudeĭensity and specific volume of air varies with elevation above sea level.Īir - Density vs. Definitions and convertion calculators.Īir - Density and Specific Volume vs. Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.ĭensities of solids, liquids and gases. Dry Air and Water Vapor - Density and Specific Volume vs. Values are for atmospheric pressure - 29.96 inches Mercury (760 mm Mercury, 14.696 psia, 1.0333 kg/cm 2, 101.33 kPa ). Density and specific volume of dry air and water vapor at temperatures ranging 225 to 900 o F (107 to 482 o C) are indicated below.
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