What Does Specific Gravity Tell Us?

What does a specific gravity of 1.020 mean?

Urine specific gravity is a measure of the ratio of the density of urine to the density of water.

Urine specific-gravity measurements normally range from 1.002 to 1.030.


The NCAA selected a urine specific-gravity measurement of ≤1.020 to indicate euhydration.


What does it mean if your specific gravity is low?

Very low specific gravity means dilute urine, which may be caused by drinking too much fluid, severe kidney disease, or the use of diuretics.

What is a normal specific gravity?

The normal range for urine specific gravity is 1.005 to 1.030.

Is density equal to specific gravity?

Density is defined as the mass per unit volume of a substance. … When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid. However, if the specific gravity is expressed at different temperatures, it will no longer be equal to the density.

What does a specific gravity of 1.025 mean?

Specific gravity is usually 1.010-1.025 (normal range: 1.003-1.030) and highest in the morning. A value >1.025 indicates normal concentrating ability. A value >1.035-1.040 suggests possible contamination, very high levels of glucose, or recently received low-molecular-weight dextran or high-density radiopaque dyes.

Why is specific gravity important?

Significance and Use 4.1 Specific gravity is an important property of fluids being related to density and viscosity. Knowing the specific gravity will allow determination of a fluid’s characteristics compared to a standard, usually water, at a specified temperature.

What is the significance of having low or high specific gravity?

kidney disease (high or low specific gravity can indicate an inability of the kidney tubules to function correctly) infection, such as a urinary tract infection. brain injuries, which can cause a person to develop diabetes insipidus.

What is the use of specific gravity?

The term “Specific Gravity” (SG) is used to define the weight or density of a liquid as compared to the density of an equal volume of water at a specified temperature. The temperature used for measurement is usually 39.2oF (4oC), because this temperature allows water to assume its maximum density.

Is urine specific gravity of 1.020 normal?

Normal results in adults generally range from 1.010 to 1.020. Abnormal results are generally those below 1.010 or above 1.020. In patients with certain kidney diseases, USG doesn’t vary with fluid intake and is called a fixed specific gravity.

What color is urine when your kidneys are failing?

When kidneys are failing, the increased concentration and accumulation of substances in urine lead to a darker color which may be brown, red or purple. The color change is due to abnormal protein or sugar, high levels of red and white blood cells, and high numbers of tube-shaped particles called cellular casts.

What is difference between density and specific gravity?

Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3). It is therefore a relative quantity with no units.

What does a high specific gravity mean?

High specific gravity suggests that the urine is too concentrated. Conditions that cause high specific gravity include: dehydration. diarrhea or vomiting resulting in dehydration.

Is 1.030 specific gravity normal?

Normal Results The urine specific gravity test is easier and more convenient, and is usually part of a routine urinalysis . The urine osmolality test may not be needed. The normal range for urine specific gravity is 1.005 to 1.030.

What causes increased urine specific gravity?

Increases in specific gravity (hypersthenuria, i.e. increased concentration of solutes in the urine) may be associated with dehydration, diarrhea, emesis, excessive sweating, urinary tract/bladder infection, glucosuria, renal artery stenosis, hepatorenal syndrome, decreased blood flow to the kidney (especially as a …

What does a specific gravity of 1 indicate?

Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. … If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass.