Urine pH shows how acidic or alkaline your urine is.
- Normal range (adults)
- 4.5–8
- Sample
- Urine
- Fasting
- Not usually needed
- Also called
- Urine Reaction
Urine pH normal range
| Group | ValueSame unit in all countries |
|---|---|
| Adults | 4.5–8 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the Urine pH test done?
It is part of the routine urine test and helps assess kidney stones and urinary infections.
What does a high Urine pH level mean?
Alkaline urine (high pH) can be caused by diet or some urinary infections.
Common causes
- Vegetarian diet rich in fruit and vegetables
- Some urinary tract infections
- Kidney tubular disorders
- Vomiting
Diet and lifestyle tips
- Drink enough water
- If you form stones, follow your doctor's specific stone diet
What does a low Urine pH level mean?
Acidic urine (low pH) can favour uric acid kidney stones.
Common causes
- High meat intake
- Dehydration
- Uncontrolled diabetes
- Diarrhoea
Diet and lifestyle tips
- Drink more water
- Eat more vegetables and fruit; reduce red meat
When should you see a doctor?
Urine pH alone is rarely significant; discuss it if you have stones or infections.
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.