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Kidney Function Test: Costs, Purpose, Normal Range and Interpretation

Kidney Function Test (RFT/KFT)
  • Sample Type : Blood
  • Parameters : 7
  • Report Time : 24/48 Hrs
  • Home Collection: Yes
  • Fasting : Not Required
  • Age Group: All
OFFER PRICE:  ₹880 ₹1200 30% off


Kidney Function Test (RFT/KFT)
81+ booked in last 3 days

Kidney Function Test (RFT/KFT) (7 Tests Included)

  • Bun / Sr.creatinine Ratio
  • Blood Urea Nitrogen (Bun)
  • Calcium
  • Creatinine - Serum
  • Urea / Sr.creatinine Ratio
  • Urea (Calculated)
  • Uric Acid

A kidney function test or a KFT test, is a group of blood and urine tests to evaluate the health of your kidneys. A renal function test allows healthcare professionals to properly diagnose if there are any sign of kidney problems and customize a treatment plan.

The blood test for kidney function is a non-invasive test that measures the levels of waste products in the blood that are normally filtered out by the kidneys. 1

Types of Kidney Function Tests

Kidney function tests, including glomerular filtration rate (GFR), blood urea nitrogen (BUN), urinalysis, and creatinine blood test, evaluate the kidneys' ability to filter and remove waste from the body. These tests play an important role in diagnosing and monitoring overall renal health.

  • Glomerular filtration rate (GFR) test: Measures the rate at which the kidneys filter blood, providing an estimate of overall kidney function. Low GFR can indicate a decrease in kidney function and potential kidney disease.
  • Blood urea nitrogen test : A by-product of protein metabolism diagnoses the amount of nitrogen in the blood from urea. Improved BUN levels may suggest kidney dysfunction or dehydration. 2
  • Urinalysis test: Analyzes urine for abnormalities such as blood, protein or abnormal cells, providing insights into the health and function of the kidneys. Identifies a variety of conditions, including symptoms of kidney infection, stone, or glomerular disease.
  • Creatinine blood test: Measures creatinine levels in the blood, waste substances from muscle metabolism. Improved levels may indicate impaired kidney function, and creatinine is commonly used to assess the overall health of the kidneys.
  • Imaging techniques for evaluating kidney function: Various imaging methods such as ultrasound, CT scan or MRI provide visual assessment of kidney size, shape and potential abnormalities. Helps to diagnose structural problems that affect kidney function, such as tumours, cysts or obstruction.

Learn everything about KFT Profile Tests before you book lab test online. Understand the why, how, and what of this test.

Why Do Doctors Recommend Renal Function Tests?

The two kidneys are an important part of the urinary system.  They sit in the back of the abdomen just below the ribcage. Their major function is to help your body filter waste materials and expel them as urine. But if the potency of your kidney’s filtering system is getting weaker, you might be suggested for a renal function test. The following might be one of the reasons for it:

  • High blood pressure (hypertension)
  • Diabetes
  • Family history of kidney disease
  • Blood in your urine (hematuria)
  • Painful urination (dysuria)
  • Frequent urge to urinate
  • Problems with starting to pee

How To Prepare For KFT Blood Test?

The steps below help you ensure that your kidney function blood test provides the most accurate information about your kidney health.

  • Fasting requirements: Some kidney function tests, such as BUN and creatinine blood tests, usually do not require fasting. However, specific tests may require fasting, so follow the doctor’s instructions for the correct result.
  • Drug Guidelines: Inform your doctor about all medications, including prescription and over-the-counter medications and supplements, as some may affect test results. Follow any instructions regarding drug adjustment before testing.
  • Contact to doctor: Share details about existing kidney conditions, symptoms, or medications you are taking. Clear Communication helps healthcare providers to test according to your specific needs and accurately explain the results.

What Happens During KFT Blood Test?

A KFT profile test (Kidney function test) only takes a few minutes. 

  • As per the scheduled time of the blood test, a Lab Technician who usually takes blood samples will arrive.
  • A thin needle will be used to draw blood from your arm’s vein.
  • The needle might cause a mild pinch and some discomfort.
  • The lab technician then fills a collection tube with blood and then removes the needle from the skin.
  • They place a small bandage on the arm
  • These samples are then sent over to the laboratory for analysis of the levels of creatinine, urea, and other markers of kidney functions.

Please note: There might be slight pain or bruising at the spot where the needle was inserted, but most of the symptoms go away quickly.

Should you book blood test online to check your Kidney Function or go to the nearest clinic and get it done by a medical professional? Let's Find Out.

Can I Take Blood Test For Kidney Function At Home?

Yes, the kidney function test or renal function test can be taken at home. Healthcareontime at-home lab testing service in association with thyroxine provides a convenient and efficient way to get important medical tests done from the comfort of your own home, without the need for a doctor's visit or a trip to a lab. It's important to note that it's always a good idea to consult with a healthcare provider about any concerns or questions you may have about your test results.

How Much Does KFT Blood Test Cost?

The Renal Profile Test cost varies significantly depending on many factors. 

  • Location: Kidney Function Test Prices may vary depending on the city or the region in which the test is conducted. For example, in Bangalore or Mumbai, it might be expensive as compared to small towns.  
  • Type of facilities centres: The KFT test price also varies between private hospitals, government hospitals, and diagnostic centres. Cost is lower in government hospitals as compared to private ones.
  • Healthcare centres: Diagnostic centres, laboratories and hospitals may have different KFT test prices. It depends upon the benefits and reputation of the healthcare centre. 
  • Insurance Coverage: Individuals with health insurance can cover partial or all costs depending on their policy coverage and network providers.
  • Other tests: KFT can be part of a larger panel of tests, such as a comprehensive metabolic panel (CMP) or a basic metabolic panel (BMP). The overall cost may vary depending on the number and type of tests included in the panel.
  • Additional services: Additional services such as home sample collection, express test results, or additional charges for special management may be paid, which contributes to the overall RFT blood test price.

On average, the KFT test price in India can range from INR. 800 to INR. 1900, depending on the location and laboratory. However, the cost may be higher if additional kidney related tests are required or if the patient requires specialized testing.


Price (INR)

Kidney Function Test

Rs. 262-869

Creatinine Test

Rs. 190

Blood Urea Nitrogen Test

Rs. 82-152

Glomerular Filtration Rate (GFR)

Rs. 150-240

By opting for HealthcareOnTime lab test at-home facilities, you can access comprehensive Thyrocare Kidney Test Packages. We provide two options: a KFT Test (Kidney function test) encompassing 11 parameters and an Electrolytes Test covering 3 parameters. Ensure your well-being by incorporating Kidney screening tests into your routine health checkups with our convenient at-home testing services.

Package Type

Parameters Covered

Price (INR)

Kidney Function Test (RFT/KFT)

11 parameters

Rs. 880

Electrolytes Serum Test

3 parameters

Rs. 450

You received your KFT blood test results but still need help determining if they fall under the normal range. Read this section to know if your results range between the KFT normal range.

What Do Kidney Function Test Results Mean?

A KFT test or renal function test is conducted to check the health and filtration levels of your kidneys. Hence the testing markers for the results are expressed in terms of GFR and BUN, Glomerular Filtration Rate (GFR), and BUN levels, respectively. While GFR indicates your Kidney Functioning, the BUN levels measure the presence of urea nitrogen in your blood. 

What Is the KFT Test Normal Range?

The KFT Test Normal Range 3 or RFT Test Normal Range varies depending on the age and the laboratory performing the test. Refer to the table below to check the normal range for your gender.


Creatinine Levels

Blood Urea Nitrogen



0.6 to 1.1 mg/dL


7 to 20 mg/dL

7 to 20 mg/dL

Also, A Glomerular Filtration Rate (GFR)of 60 or higher is considered the normal range.

Please note: These values can vary depending on factors such as age, gender, and medical history. It is important to consult with a healthcare provider to interpret the KFT test results.

What Medical Conditions Can Cause High Creatinine Levels For Kidney Failure?

  •  Chronic Kidney Disease (CKD): Gradual deterioration of kidney function over time can lead to increased levels of creatinine.
  • Acute Kidney Injury (AKI): Sudden and severe kidney damage or dysfunction can lead to a rapid increase in creatinine levels.
  • Kidney infections or inflammation: Infections that affect the kidneys or inflammatory conditions can contribute to the growth of creatinine.
  • Urinary tract obstruction: Urinary tract obstruction, such as kidney stones, tumours or enlarged prostates, can impede normal urinary flow and cause an increase in creatinine.

What Medical Conditions Can Cause Low Creatinine Levels For Kidney Failure?

  • Decreased muscle mass: Muscle damage or atrophy-causing conditions, such as severe malnutrition, chronic illness, or some muscle-related disorders, which can lead to lower creatinine production.
  • Improved liver disease: Liver conditions that affect creatinine synthesis, such as severe liver cirrhosis, can reduce creatinine levels.
  • Pregnancy: During pregnancy, creatinine levels may have a fluid effect, resulting in lower quality.
  • Aging: With age, there may be a normal decline in muscle mass, resulting in decreased creatinine production and lower levels. 
  • Dietary Modifications: Replace saturated and trans fats with healthy fats. Include foods to increase omega-3 intake, which can improve lipid profile. Choose whole grains over refined carbohydrates to increase fibre intake. A diet rich in fruits and vegetables provides essential vitamins, minerals and antioxidants.
  •  Regular Exercise: Engage in regular physical activities, including aerobic exercises such as walking, jogging or cycling, as this can help raise HDL cholesterol and improve overall cardiovascular health.
  •  Weight Management: Achieving and maintaining a healthy weight through a combination of diet and exercise can positively affect lipid levels.

Relevant Queries: (FAQ) 

How often should one undergo kidney function tests?

The frequency of kidney function tests varies based on individual health conditions. Typically, individuals with risk factors or existing kidney issues may undergo tests more frequently, as advised by the doctor.

Can dehydration affect kidney function test results?

Yes, dehydration can lead to concentrated urine and may affect the accuracy of kidney function tests. It's crucial to stay adequately hydrated to ensure reliable test results and support overall kidney function.

 Are there any specific conditions or medications that may affect KFT / RFT test results?

Yes, some medical conditions such as diabetes, high blood pressure, and urinary tract infections can affect kidney function test results. In addition, certain drugs and substances such as certain antibiotics, diuretics, and contrast colours can affect the accuracy of the test.

Experience cost-effective lab testing at home with HealthcareOnTime's exclusive partnership with Thyrocare. Benefit from competitive prices while ensuring precise results. Our collaboration with Thyrocare Technologies Limited guarantees affordability without compromising on the accuracy and reliability of your lab test.

Exclusive Service and Reporting managed by our Partner Diagnostic Centre

At HealthcareOnTime, we've got your back with our comprehensive health checkup packages! Take charge of your well-being by booking online. These packages empower you to stay ahead, catching potential issues early for timely management. It's like having a health ally and making informed decisions for a healthier, happier life.

Disclaimer: Although we have endeavoured to provide accurate information on this page, we strongly recommend that you seek advice from your doctor before relying on any of the test ranges or lab-test recommendations mentioned herein.


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Relevant Queries: (FAQ)

The frequency of kidney function tests varies based on individual health conditions. Typically, individuals with risk factors or existing kidney issues may undergo tests more frequently, as advised by the doctor.

Yes, dehydration can lead to concentrated urine and may affect the accuracy of kidney function tests. It's crucial to stay adequately hydrated to ensure reliable test results and support overall kidney function.

Yes, some medical conditions such as diabetes, high blood pressure, and urinary tract infections can affect kidney function test results. In addition, certain drugs and substances such as certain antibiotics, diuretics, and contrast colours can affect the accuracy of the test.

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  • Disclaimer: HealthcareOnTime offers extensively researched information, including laboratory testing for health screening. However, we must emphasize that this content is not intended as a substitute for professional medical advice or diagnosis. Always prioritize consulting your healthcare provider for accurate medical guidance and personalized treatment. Remember, your health is of paramount importance, and only a qualified medical professional can make precise determinations regarding your well-being. Protection Status Protection Status Protection Status