KFT Report: Normal Range & How to Read It
A kidney function test (KFT), also called RFT, measures waste products such as creatinine and urea that healthy kidneys clear from the blood.
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What a KFT checks
Creatinine
A waste product from muscles, cleared by the kidneys.
Urea and BUN
Waste made when the body breaks down protein.
eGFR
An estimate of how well the kidneys filter blood.
KFT normal range for adults
Labs differ a little. Always compare with the range printed on your report.
| Test | Men | Women | Unit | What it tells you |
|---|---|---|---|---|
| Waste products | ||||
| Serum creatinine | Men 0.74–1.35 | Women 0.59–1.04 | mg/dL | Rises when the kidneys clear less. |
| Blood urea | 15–40 | mg/dL | Waste made when protein breaks down. | |
| BUN | 7–20 | mg/dL | The nitrogen part of urea. | |
| Uric acid | Men 3.4–7.0 | Women 2.4–6.0 | mg/dL | Made when the body breaks down purines. |
| Filtering and ratios | ||||
| eGFR | 90 or more | mL/min/1.73 m² | Estimated from creatinine, age and sex. | |
| BUN/creatinine ratio | 10–20 | Helps your doctor read BUN and creatinine together. | ||
| Urea/creatinine ratio | 20–40 | The same idea, using urea in place of BUN. | ||
Ranges from the NirogGyan biomarker library. Updated .
What a KFT report looks like
The same results in the usual lab layout, and as a NirogGyan Smart Report.
Numbers and ranges in rows
Each value on our report slider
How to read your KFT report
Check your details
Age and sex decide the creatinine range and the eGFR.
Find your result
The Result column shows your value for each test.
Compare with the range
The Range column shows what is normal for that test.
Look for H or L
A flag marks a value outside the range. Your doctor reads what it means.
KFT report questions
Are KFT and RFT the same test?
Yes. KFT (kidney function test) and RFT (renal function test) are two names for the same group of tests.
What does high creatinine mean?
Creatinine is a waste product the kidneys clear. A value above the lab's range is one sign your doctor checks along with eGFR, urea and your history.
What is eGFR on a KFT report?
eGFR is an estimate of how well the kidneys filter blood. It is calculated from creatinine, age and sex.
Do I need to fast for a KFT?
Many labs do not need fasting for a KFT alone. If other tests are booked with it, follow the lab's instructions.
Can dehydration change KFT results?
Yes. Not drinking enough water can raise urea and creatinine for a short time. Your doctor may repeat the test.
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Upload your reportThis page explains how to read a lab report. It does not replace advice from your doctor. All sample values are made up.