“Out of range” on a urine test means one or more of your results fell outside the reference range, which is the set of values considered normal for healthy people. This doesn’t automatically signal a problem. Reference ranges are built from test results of large groups of healthy individuals, and it’s common for people with no health issues to occasionally have a result that falls outside them. Your provider will look at your symptoms, medical history, and sometimes repeat testing before drawing any conclusions from a single flagged value.
How Reference Ranges Work
Labs establish a “normal” window for each substance they measure in your urine. If your result is higher or lower than that window, the report typically flags it with an “H” (high), “L” (low), or simply marks it as “out of range.” These ranges can vary slightly between labs because different equipment and testing methods produce slightly different measurements. That’s why a result that’s normal at one lab could technically be flagged at another.
Reference ranges also differ by age, sex, and sometimes pregnancy status. A result within the normal range isn’t an absolute guarantee of good health either. Some conditions can exist even when numbers look normal on paper. The flag is a starting point for investigation, not a diagnosis.
Protein in Urine
For a random urine sample, the normal protein level is 0 to 14 mg/dL. For a 24-hour collection, it’s less than 80 mg per 24 hours. If your result comes back above these numbers, the lab will flag it. Protein that spills into your urine (called proteinuria) can point to kidney stress or damage, since healthy kidneys typically keep protein in the blood.
Dipstick tests grade protein on a scale from trace to 3+, with the color change on the strip indicating how much protein is present. A trace amount can be temporary and harmless, caused by heavy exercise, fever, or dehydration. Persistently elevated protein, especially at higher levels, may indicate kidney disease. Albumin, one specific protein, is tracked closely: less than 30 mg per gram of creatinine is considered normal to mildly increased, 30 to 300 is moderately increased, and above 300 is severely increased.
Glucose in Urine
Glucose normally doesn’t show up in urine at all. Your kidneys reabsorb it back into the bloodstream before it reaches your bladder. But when blood sugar exceeds roughly 180 mg/dL, the kidneys can’t keep up, and glucose spills over into the urine. This is the renal threshold for glucose, and it’s the reason a positive glucose result on a urine test raises a flag for diabetes or prediabetes.
Some people, though, remain urine glucose-negative even with blood sugar above 180 mg/dL because their personal threshold is higher. That’s why blood tests remain the gold standard for diagnosing diabetes. A positive glucose finding on a urine test is a signal worth investigating, but not a diagnosis on its own.
Signs of Infection
Two markers on a urine dipstick point toward a urinary tract infection: leukocyte esterase and nitrites. Leukocyte esterase is an enzyme released by white blood cells, so its presence suggests your immune system is fighting something in your urinary tract. Nitrites appear when certain bacteria convert naturally occurring compounds in your urine.
When both are positive together, the combination has roughly 79% sensitivity and 81% specificity for detecting a bacterial infection. That means it catches most infections but isn’t perfect. A negative result on both markers is reassuring, with about a 94.5% chance that no significant infection is present. If these markers are flagged, a urine culture is the typical next step to identify the specific bacteria and determine which treatment will work.
Blood in Urine
Blood flagged on a urine dipstick can mean different things depending on what the microscope shows. If the dipstick detects blood and the microscopic exam shows a proportionate number of intact red blood cells, you have hematuria, meaning actual blood cells are present. Common causes include UTIs, kidney stones, and vigorous exercise.
If the dipstick is positive for blood but the microscope shows very few or no red blood cells, free hemoglobin or myoglobin is the likely culprit instead. Hemoglobin can enter urine when red blood cells break down in the bloodstream, while myoglobin comes from damaged muscle tissue. These are different conditions with different implications, so the microscopic exam matters as much as the dipstick result.
Specific Gravity
Specific gravity measures how concentrated your urine is. The normal range is 1.005 to 1.030. A result below roughly 1.010 means your urine is dilute, either from drinking a lot of fluids or from a condition affecting your kidneys’ ability to concentrate urine. A result above 1.030 suggests concentrated urine, often from dehydration but sometimes from other causes like heart failure or certain hormonal conditions.
This is one of the most context-dependent numbers on the report. If you drank a large amount of water before the test, a low specific gravity is expected and harmless. If you were dehydrated, a high reading makes sense. Your provider will interpret this alongside your other results and symptoms.
pH Level
Normal urine pH ranges from 4.6 to 8.0. Your diet is the biggest everyday influence on where you fall in that range. A diet heavy in fruits and vegetables tends to push pH higher (more alkaline), while a diet heavy in meat, fish, or cheese pushes it lower (more acidic).
An out-of-range pH matters most for kidney stone risk. Different types of stones form in different pH environments, so tracking urine acidity helps guide prevention strategies. An unusually high pH can also suggest a UTI, since certain bacteria make urine more alkaline. A persistently low pH may point to metabolic acidosis or, in people with diabetes, ketoacidosis.
Ketones
Trace or small amounts of ketones in your urine are normal. Your body produces ketones whenever it burns fat for fuel instead of glucose, which happens routinely during sleep, fasting, or on a low-carb or ketogenic diet. People eating a strict keto diet (typically 70% to 80% fat, 5% to 10% carbs) will almost always have detectable ketones in their urine.
Moderate or high ketone levels are a different story. Without diabetes, they can result from prolonged vomiting or diarrhea, eating disorders, starvation, or extended intense exercise that depletes your body’s stored glucose. With diabetes, high ketones can signal diabetic ketoacidosis, a serious condition that needs immediate attention.
Bilirubin
Bilirubin should not be detectable in the urine of a healthy person. Any amount flagged on a dipstick is considered abnormal and can be an early sign of liver or bile duct problems, sometimes appearing before any visible jaundice (yellowing of the skin or eyes). Bilirubin ends up in urine when the liver can’t process it properly or when the bile duct is blocked, allowing a water-soluble form to leak into the bloodstream and get filtered by the kidneys.
Reasons for False or Misleading Results
Not every out-of-range result reflects what’s happening in your body. Several factors can push results outside normal limits without any underlying disease. Dehydration artificially concentrates everything in your urine, making substances appear elevated. Heavy exercise can temporarily cause protein and even blood to appear. Certain foods and medications interfere with specific tests. Poppy seeds, for example, contain small amounts of codeine and morphine, and eating just one poppy seed muffin or two poppy seed bagels can produce a positive result on drug screening.
Some antibiotics, antihistamines, and other common medications are known to cause false positives on various urine panels. Vitamins, particularly B vitamins and vitamin C, can alter the color and chemistry of your urine enough to affect dipstick readings. If you’re surprised by an out-of-range result, think about what you ate, drank, or took in the 24 to 48 hours before the test.
What Typically Happens Next
A single out-of-range marker on a routine urine test rarely leads to immediate concern. Many hospitals and labs use a reflex system: if certain dipstick results are abnormal, a urine culture or microscopic exam is automatically triggered to get more information. Your provider may also order a repeat test to see if the abnormality persists or was a one-time finding.
One important pattern in clinical practice is that abnormal urinalysis results often lead to antibiotics being prescribed even when the person has no urinary symptoms. This is increasingly recognized as inappropriate. Bacteria can exist in the urine without causing infection, particularly in older adults, and treating based on a lab flag alone, without symptoms, often does more harm than good. If you have no burning, urgency, or other urinary complaints but your test came back flagged, that context matters.