Specific Gravity (Urine)
Urine specific gravity measures the concentration of dissolved substances in your urine. It reflects how well your kidneys are concentrating or diluting urine.
Category: Urinalysis
Also known as: specific gravity, urine specific gravity, sp gr, sp. gr., urine sp gravity, sg, specifična težina
Reference range: 1.005–1.03 ratio (Source: ABIM)
Standard unit: ratio
High values may indicate
High specific gravity may indicate dehydration, heart failure, kidney arterial stenosis, or excess substances like glucose or protein in the urine.
Low values may indicate
Low specific gravity may indicate overhydration, diabetes insipidus, kidney damage, or excessive fluid intake.
Frequently asked questions
- What is a normal Specific Gravity (Urine) level?
- A typical reference range for Specific Gravity (Urine) is 1.005–1.03 ratio (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Specific Gravity (Urine) measured in?
- Specific Gravity (Urine) is most commonly reported in ratio. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Specific Gravity (Urine) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Specific Gravity (Urine) over time?
- Yes. Upload results from any lab and BloodId charts your Specific Gravity (Urine) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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