Urine Specific Gravity — What It Means in Your Urine Test
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This shows how watered-down or concentrated your urine is, which reflects how well your kidneys balance fluid.
Urine Specific Gravity answers one simple question: is your sample thin and diluted or thick and packed? Put plainly, it mirrors how your body manages fluid, and a lower reading often just means you drank plenty.
Also known as: USG, SG (urine), Urinary specific gravity, Urine concentration
This isn't a case where higher or lower is better. Your body keeps it in a narrow band, and both directions can matter.
Last reviewed: 2026-08-16
What is Urine Specific Gravity?
This reading compares the density of your urine against plain water, showing how much dissolved material it holds. It reveals whether your kidneys are packing waste tightly or flushing it out diluted.
Why is Urine Specific Gravity tested?
It is checked to see how effectively the kidneys concentrate urine. It also gives a rough sense of whether you are well hydrated.
What is a normal Urine Specific Gravity range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- 1.005–1.030
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [CLSI, 2009]
What does your Urine Specific Gravity value mean?
There is no widely-accepted set of value bands for this parameter. Compare your result with the reference range printed on your own report, and discuss it with your doctor.
What does a high Urine Specific Gravity result mean?
A high result often just means you were dehydrated when the sample was taken. Sometimes it reflects the kidneys holding on to more water than usual.
What does a low Urine Specific Gravity result mean?
A low result often means you had drunk a lot of fluid. Sometimes it suggests the kidneys are not concentrating urine as well, which is worth discussing with your doctor.
What can affect your Urine Specific Gravity result?
- Hydration
- Recent fluid intake
- Water tablets (diuretics)
- Dye from a scan
- Sugar or protein in urine
Questions to ask your doctor
About this result
- What does my Urine Specific Gravity result mean for me specifically, given my age and health?
- Is my Urine Specific Gravity in the range that is right for me, not just the lab's general range?
What to do next
- Could anything I eat, do, or take have affected my urine concentration result?
- Is there anything I should do about my Urine Specific Gravity, or is it fine to leave as it is?
About retesting
- Does my Urine Specific Gravity need to be repeated, and if so, when?
- The typical range for Urine Specific Gravity can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my Urine Specific Gravity be looked at together with my Urine pH and Urine Protein result?
- Does my Urine Specific Gravity connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is Urine Specific Gravity?
- This reading compares the density of your urine against plain water, showing how much dissolved material it holds. It reveals whether your kidneys are packing waste tightly or flushing it out diluted. It is checked to see how effectively the kidneys concentrate urine. It also gives a rough sense of whether you are well hydrated.
- What is a normal urine concentration range?
- A typical adult range is around 1.005–1.030. No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison. Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
- What does a high Urine Specific Gravity result mean?
- A high result often just means you were dehydrated when the sample was taken. Sometimes it reflects the kidneys holding on to more water than usual.
- What does a low Urine Specific Gravity result mean?
- A low result often means you had drunk a lot of fluid. Sometimes it suggests the kidneys are not concentrating urine as well, which is worth discussing with your doctor.
- What can affect your Urine Specific Gravity result?
- Several everyday factors can influence it, including Hydration, Recent fluid intake, Water tablets (diuretics), Dye from a scan, Sugar or protein in urine.
Sources
- CLSI (2009) — CLSI GP16-A3 Urinalysis; Approved Guideline
Part of the Urine (Urinalysis)
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