Test library
Protein-to-Creatinine Ratio Panel
This random urine test measures protein and creatinine and calculates their ratio. The ratio helps assess how much protein is being excreted relative to urine concentration.
Order Protein and Creatinine Urine Test, Random
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Protein and Creatinine Urine Test, Random- Typical turnaround
- 1-3 business days
- Starting price
- From $49
- Results
- Confidential, online
Quick answer
The Random Protein and Creatinine Urine Test measures the amount of protein and creatinine in a single urine sample and calculates the protein-to-creatinine ratio. Protein in urine can be a sign that the kidneys are filtering differently than usual, and the ratio adjusts for how dilute or concentrated the sample is. The test is commonly used as part of kidney evaluation and is interpreted by a healthcare provider with blood tests and other findings.
What this test measures
Healthy kidneys keep most proteins in the blood, so only small amounts appear in urine. When the filtering units of the kidney are affected, more protein can pass into the urine. Measuring protein alone in a random sample can be misleading because urine concentration varies, so creatinine, a waste product excreted at a relatively steady rate, is measured at the same time to create a ratio.
The test is performed on a urine sample collected at one point in time, and results are reported as a protein concentration, a creatinine concentration, and the calculated protein-to-creatinine ratio. Some laboratories report an estimated daily protein excretion derived from the ratio. A timed collection may be requested separately when a more complete measurement is needed.
People may order this test when a healthcare provider is evaluating kidney function, monitoring a known kidney condition, or investigating swelling or abnormal urinalysis results. It can also be used to follow protein excretion over time. A qualified healthcare provider should interpret the result with blood tests such as creatinine and eGFR, the person's history, and other clinical information.
- Urine protein concentration
- Urine creatinine concentration
- Protein-to-creatinine ratio
- Estimated daily protein excretion when reported
- Urine albumin when included in the order
- Urine albumin-to-creatinine ratio when ordered instead of or alongside total protein
Why people order this test
- Assess protein excretion as part of kidney evaluation
- Monitor a known kidney condition over time
- Follow up on an abnormal urinalysis result
- Add detail when swelling or other symptoms suggest protein loss
- Compare urine findings with blood kidney function tests
How to prepare
No fasting is required. A random urine sample is collected at the lab following its instructions. Avoid strenuous exercise immediately before collection if your provider advises it, since activity can temporarily affect urine protein.
Understanding your results
Results are usually available within one to three business days. The protein-to-creatinine ratio helps show whether protein excretion is elevated relative to the sample's concentration. A qualified healthcare provider should interpret the result with your blood tests and clinical history.
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Florida
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Frequently Asked Questions
Why is creatinine measured with protein in urine?
Creatinine helps correct for how dilute or concentrated the urine is. The protein-to-creatinine ratio gives a more consistent picture than a protein concentration alone.
What is the difference between a random and a timed urine collection?
A random sample is collected at one point in time, while a timed collection gathers urine over a set period, often a full day. Each has different uses, and your provider chooses based on the question being asked.
Does protein in urine always mean kidney disease?
No. Protein can appear temporarily after exercise, fever, or other stress, and some people excrete small amounts normally. Persistent or elevated findings are evaluated in context.
How does this test differ from a urine albumin test?
Total protein includes all proteins, while albumin testing measures one specific protein. Providers choose one or both depending on the condition being evaluated.
How is the sample collected?
A urine sample is provided at the laboratory following its collection instructions. No blood draw is required for this test.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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