Not Medical Advice: SP. GR. stands for specific gravity.
Urine specific gravity, as explained by MedlinePlus, is a laboratory test that shows the concentration of all chemical particles in the urine. This test helps evaluate your body's water balance and urine concentration.
Reference Values: 1.002-1.030
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples.
Osmolality is a more specific test for urine concentration. The urine specific gravity test is easier and more convenient, and is usually part of a routine urinalysis.
Increased urine specific gravity may be due to conditions such as:
Loss of body fluids (dehydration)
Diarrhea that causes dehydration
Sugar (glucose) in the urine
Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
Decreased urine specific gravity may be due to:
Damage to kidney tubule cells (renal tubular necrosis)
Drinking too much fluid
Check out 6 Tips for Keeping Your Urinary Tract System Healthy, shared by Verywell.