{"id":"urine-specific-gravity","name":"Urine Specific Gravity","shortName":"Specific Gravity","aliases":["Specific Gravity","SG","Specific Gravity, Urine","Urine SG","Sp Gravity","Sp Grav","SG, Urine","Specific Gravity, UA","Densidad","Spezifisches Gewicht","Urine Specific Gravity","Specific Gravity (UA)","Specific Gravity (Urine)","Specific Gravity, Random Urine","Specific Gravity, Urine (Dipstick)","Sp. Gr.","Spec Grav","Urine Density","Urine Specific Gravity (USG)"],"abbreviations":["SG","USG","Sp Gr"],"loinc":[{"code":"5811-5","primary":true},{"code":"53326-5","primary":false},{"code":"5810-7","primary":false},{"code":"50562-8","primary":false},{"code":"2965-2","primary":false}],"specimen":"urine","units":[{"ucum":"1","display":"SG"}],"referenceRanges":[{"population":"Adults","low":1.005,"high":1.03,"unit":"1","unitDisplay":"SG","note":"Labcorp's urinalysis report and MedlinePlus both list 1.005–1.030, the interval used here. Intervals vary by lab and method: Quest prints 1.001–1.035, AAFP (2005) gives 1.003–1.030, a textbook random-urine interval verified for a handheld refractometer is 1.0020–1.0300 (Wyness 2016), and hospital lab tables run from 1.001 or 1.003 at the low end up to 1.035 at the high end. AAFP (2022) reads about 1.010 as balanced fluid status, above 1.020 as possible dehydration and below 1.003 as marked dilution. Specific gravity mostly reflects hydration, so a value outside the range often just reflects what you drank.","sources":[{"title":"Urinalysis, Routine With Microscopic Examination on Positives: sample report (test 003038)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/003038.pdf","publisher":"Labcorp","year":2026},{"title":"003038: Urinalysis, Routine With Microscopic Examination on Positives","url":"https://www.labcorp.com/tests/003038/urinalysis-complete","publisher":"Labcorp"},{"title":"Urine specific gravity test","url":"https://medlineplus.gov/ency/article/003587.htm","publisher":"MedlinePlus Medical Encyclopedia (NIH National Library of Medicine)","year":2025},{"title":"Urinalysis, Complete (test code 5463)","url":"https://testdirectory.questdiagnostics.com/test/test-detail/5463/urinalysis-complete?cc=MASTER","publisher":"Quest Diagnostics"},{"title":"Urinalysis: A Comprehensive Review","url":"https://www.aafp.org/pubs/afp/issues/2005/0315/p1153.html","publisher":"American Family Physician","year":2005},{"title":"Office-Based Urinalysis: A Comprehensive Review","url":"https://www.aafp.org/pubs/afp/issues/2022/0700/office-based-urinalysis.html","publisher":"American Family Physician","year":2022},{"title":"Evaluation and analytical validation of a handheld digital refractometer for urine specific gravity measurement","url":"https://doi.org/10.1016/j.plabm.2016.06.001","publisher":"Practical Laboratory Medicine","year":2016},{"title":"An Emerging Human Pathogen: Raoultella Planticola","url":"https://doi.org/10.7759/cureus.92875","publisher":"Cureus (urinalysis table with the treating hospital's reference intervals)","year":2025},{"title":"Median Arcuate Ligament Syndrome Beyond the Classic Demographic: Celiac Artery Compression in a 62-Year-Old Man With Cardiovascular Risk Factors","url":"https://doi.org/10.7759/cureus.111180","publisher":"Cureus (urinalysis table with the treating hospital's reference intervals)","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"How concentrated your urine is compared with plain water. It mostly reflects how much fluid you've had and how well your kidneys balance water.","url":"https://bloodtesttracker.com/markers/urine-specific-gravity","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}