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Phurphmeter

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

A urine pH test measures the acidity or alkalinity of your urine using a pH meter, helping doctors evaluate your body's acid-base balance and detect certain medical conditions.

Quick summary

{"Urine pH measures how acidic or alkaline your urine is on a scale of 1-14","Normal urine pH typically ranges from 4.5 to 8, with an average around 6.0","Diet, medications, and certain health conditions can affect your urine pH","This test helps diagnose kidney stones, urinary tract infections, and metabolic disorders","A pH below 7 indicates acidic urine; pH above 7 indicates alkaline urine"}

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

Key facts at a glance

LOINC
106930-1
Short code
Urine pH
Synonyms
pH Ur pH-meter
Category
chemistry
Sample
serum
Container
Clean-catch urine container or sterile urine cup
Units
not specified
Ref low
4.5
Ref high
8
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
ph-meter
CPT
81003
SNOMED
271710005
Specimen volume
10-20 mL preferred
Stability
Room temperature: 2 hours; Refrigerated (2-8°C): 24 hours. For pH stability, prompt analysis is recommended as CO2 loss can artificially increase pH
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
1–4 hours
Order
routine

What is this test?

The urine pH test measures the concentration of hydrogen ions in your urine, indicating how acidic or alkaline (basic) your urine is. The pH scale ranges from 1 to 14, with 7 being neutral. A pH below 7 means your urine is acidic, while a pH above 7 means it is alkaline. This test is performed using a pH meter, which provides a precise measurement of your urine's acid-base balance.

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 using a pH meter, which electronically measures the hydrogen ion concentration in your urine. The procedure is quick, painless, and similar to a routine urinalysis.

What do the results mean?

Normal urine pH typically ranges from 4.5 to 8, with most people having a pH around 6.0 (slightly acidic). Your urine pH can vary throughout the day based on your diet, hydration status, medications, and overall health. A single pH measurement provides limited information, so doctors often look at trends over time or combine it with other test results to make a diagnosis.

Factors that affect urine pH

Several factors can influence your urine pH: diet plays a major role (meat and dairy tend to make urine more acidic, while fruits and vegetables make it more alkaline); certain medications such as diuretics and antacids can change pH; medical conditions including kidney stones, urinary tract infections, and metabolic disorders can affect results; and dehydration can concentrate urine, potentially altering pH readings.

Reference range

4.5-8.0not specified

Specimen: serum

No special preparation or fasting required. Prefer clean-catch midstream random urine.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Do I need to fast before a urine pH test?
Typically, no fasting is required for a urine pH test. However, your doctor may ask you to avoid certain foods or medications before the test to get accurate results. It's important to follow any specific instructions provided by your healthcare provider.
Is the test painful?
No, the urine pH test is not painful. It simply requires providing a urine sample, similar to a routine urine test. The pH meter analysis is done after the sample is collected and causes no discomfort.
What does it mean if my urine pH is consistently acidic (below 6)?
Consistently acidic urine may indicate conditions such as diabetic ketoacidosis, diarrhea, starvation, or certain metabolic disorders. It may also increase the risk of forming calcium oxalate or uric acid kidney stones. Your doctor will interpret this in context with your other symptoms and test results.
What does it mean if my urine pH is consistently alkaline (above 7)?
Alkaline urine may indicate a urinary tract infection caused by urea-splitting bacteria, kidney disease, or certain metabolic conditions. It can also increase the risk of forming struvite or calcium phosphate kidney stones. Your healthcare provider will determine if further testing is needed.
Can I change my urine pH through diet?
Yes, your diet can significantly affect urine pH. Eating more fruits and vegetables tends to make urine more alkaline, while consuming more meat and dairy products tends to make it more acidic. However, dramatic dietary changes should only be made under the guidance of your healthcare provider.
  1. 1
    MedlinePlus - Urine pH TestSource
  2. 2
    Mayo Clinic - UrinalysisSource
  3. 3
    National Kidney Foundation - Kidney StonesSource

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