Skip to content

Phur

Published: July 31, 2026Updated: August 16, 2026

A urine pH test measures the acidity or alkalinity of your urine, helping doctors evaluate kidney function and detect certain medical conditions.

Quick summary

{"Urine pH indicates how acidic or alkaline your urine is","Normal range is typically 4.5-8.0, with average around 6.0","Diet, medications, and certain health conditions can affect results","Abnormal pH may indicate kidney stones, urinary tract infections, or metabolic disorders"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
2756-5
Short code
Urine pH
Synonyms
pH Ur
Category
chemistry
Sample
serum
Container
Sterile urine container (clean-catch or catheter specimen)
Units
not specified
Ref low
4.5
Ref high
8
Fasting
false
Population
adult
Sex
all
Age range
≥ 0 years
Method
Electrolyte/pH meter or reagent strip (dipstick) analysis
CPT
81001
SNOMED
271710005
Specimen volume
10-20 mL preferred
Stability
Room temperature (20-25°C): 2 hours; Refrigerated (2-8°C): 24 hours. Analyze promptly for optimal accuracy.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
1–4 hours
Order
routine

What is a Urine pH Test?

A urine pH test is a simple laboratory test that measures the concentration of hydrogen ions in your urine, indicating how acidic or alkaline (basic) your urine is. The pH scale ranges from 0 to 14, with 7 being neutral. Values below 7 indicate acidic urine, while values above 7 indicate alkaline urine.

How is the Test Performed?

For this test, you will need to provide a urine sample. Your healthcare provider may ask you to collect a clean-catch midstream urine sample to avoid contamination. The sample is then analyzed in a laboratory using a pH meter or chemical test strips that change color based on the pH level.

What Do the Results Mean?

Normal urine pH typically ranges from 4.5 to 8.0, with an average of about 6.0. However, what's considered normal can vary depending on your diet, medications, and overall health. Your doctor will interpret your results in the context of your individual health situation.

Reference range

4.5-8.0not specified

Specimen: serum

No special preparation or fasting required; random clean-catch midstream urine preferred

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Does diet affect urine pH?
Yes, diet significantly influences urine pH. High-protein diets and acidic foods (like meat and grains) tend to make urine more acidic. Vegetarian diets and alkaline foods (like fruits and vegetables) can make urine more alkaline. Your doctor may ask you to fast or follow a specific diet before the test for accurate results.
Do I need to prepare for the test?
Your doctor may provide specific instructions. Generally, you should inform your healthcare provider about all medications and supplements you're taking, as some can affect urine pH. You may be asked to avoid certain foods or fast before the test. Drink water as usual unless instructed otherwise.
Can urine pH predict kidney stones?
Yes, urine pH can help predict the type of kidney stones you may be prone to forming. Acidic urine is associated with calcium oxalate and uric acid stones, while alkaline urine is associated with calcium phosphate and struvite stones. Knowing your urine pH can help guide preventive treatments.
What happens if my urine pH is abnormal?
An abnormal urine pH alone does not diagnose a specific condition. Your doctor will consider your pH results along with other test results, symptoms, and medical history to determine if any treatment is needed. In many cases, lifestyle or dietary changes may help normalize urine pH.
  1. 1
    MedlinePlus - Urine pH TestSource
  2. 2
    Mayo Clinic - UrinalysisSource
  3. 3
    National Kidney Foundation - Understanding Urine TestsSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy