Specific gravity measures how concentrated your urine is.
- Normal range (adults)
- 1.003–1.03
- Sample
- Urine
- Fasting
- Not usually needed
- Also called
- SG, Urine SG, Urine Specific Gravity, SpGr
Urine Specific Gravity normal range
| Group | ValueSame unit in all countries |
|---|---|
| Adults | 1.003–1.03 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the Urine Specific Gravity test done?
It reflects your hydration and the kidneys' ability to concentrate urine.
What does a high Urine Specific Gravity level mean?
High specific gravity means concentrated urine, usually from not drinking enough.
Common causes
- Dehydration
- Vomiting, diarrhoea or heavy sweating
- Sugar or protein in the urine
Diet and lifestyle tips
- Drink more water through the day, more in hot weather
What does a low Urine Specific Gravity level mean?
Low specific gravity means very dilute urine.
Common causes
- Drinking large amounts of fluid
- Diuretics
- Kidney problems affecting concentration
- Diabetes insipidus (rare)
Diet and lifestyle tips
- No action if you simply drink a lot; repeat with a first-morning sample if asked
When should you see a doctor?
Discuss with your doctor if values stay very low or very high despite normal drinking.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.