Creatinine Converter: mg/dL to µmol/L

The Short Answer

To convert creatinine from mg/dL to µmol/L, multiply by 88.42. To go the other way, from µmol/L to mg/dL, divide by 88.42. So 1.0 mg/dL is 88.4 µmol/L, 1.2 mg/dL is 106.1 µmol/L, and 106 µmol/L is 1.2 mg/dL. Nothing else changes: it is the same amount of the same waste product, described once by mass and once by number of molecules.

What Is Creatinine?

Creatinine is a waste product produced by your muscles during normal activity. Your kidneys filter it out of the blood and excrete it in urine. Creatinine levels in blood tests are a key indicator of kidney function - higher levels may signal impaired kidney filtering.

Because production depends on muscle, creatinine is a useful but imperfect marker. A heavily built 30 year old can sit slightly above the printed range with completely healthy kidneys, while a frail 85 year old with very little muscle can sit comfortably inside the range even though filtering has dropped by half. That is why clinicians almost never read a creatinine value on its own. They read it next to eGFR, which adjusts the number for age and sex, and they compare it with earlier results from the same person.

Why Two Units?

The US typically reports creatinine in mg/dL (milligrams per deciliter), while most other countries use µmol/L (micromoles per liter). The conversion factor is: 1 mg/dL = 88.42 µmol/L. This tool helps you compare results from different labs or countries.

United States laboratories report by mass. The United Kingdom, Canada, Australia, Ireland, New Zealand, and most of Europe report in SI units, which count molecules instead. Neither convention is more accurate than the other. The gap only becomes a problem when a family compares a result from one country with a reference range written for the other, which is exactly how a perfectly normal 90 µmol/L gets mistaken for an alarming number.

Where 88.42 Comes From

Creatinine has a molar mass of roughly 113.12 grams per mole. Converting milligrams per deciliter into micromoles per liter means multiplying by 10,000 to move from deciliters to liters and from milligrams to micrograms, then dividing by 113.12 to turn mass into moles. That works out to 88.42. Some laboratories, textbooks, and phone apps round the factor to 88.4 or even 88, so you will occasionally see a result that differs in the final digit. Neither version is wrong, and a difference that small never changes how a result is interpreted.

mg/dL to µmol/L Conversion Table

The values below cover the range most blood panels fall into. Multiply by 88.42 for anything not listed.

µmol/L to mg/dL Conversion Table

Normal Creatinine Ranges

Normal ranges vary by age, sex, and muscle mass. Generally: 0.7–1.3 mg/dL (62–115 µmol/L) for men and 0.6–1.1 mg/dL (53–97 µmol/L) for women. Older adults may have lower creatinine due to reduced muscle mass, which can mask kidney issues.

Always compare against the range printed on your own report. Laboratories calibrate their assays differently, so one hospital may print 0.6 to 1.2 mg/dL while another two miles away prints 0.7 to 1.3 mg/dL for the same population.

Creatinine and eGFR

eGFR, or estimated glomerular filtration rate, is calculated from creatinine plus age and sex. It answers the question people actually care about: how much blood the kidneys are filtering per minute. An eGFR of 90 or above is normal, 60 to 89 is mildly reduced, 45 to 59 and 30 to 44 describe moderate reduction, 15 to 29 is severe, and below 15 is kidney failure. The current equation used across United States laboratories is CKD-EPI 2021, which no longer applies a race coefficient.

The practical takeaway is that a small creatinine change can mean a large eGFR change. Going from 1.0 to 1.4 mg/dL looks minor on paper, yet for a 70 year old woman it can move eGFR from the normal band into moderate reduction. Direction over time matters more than any single reading, so keep a simple log of results with their dates.

What Moves a Creatinine Result

Before assuming a raised value means kidney disease, rule out the ordinary explanations. Any of the following can shift a result enough to matter:

• Dehydration. Less fluid in the bloodstream concentrates creatinine. This is one of the most common reasons a result comes back high and then normalizes on a repeat test.
• A large cooked-meat meal. Cooking converts some creatine in meat into creatinine, which is absorbed and measured. A steak dinner the night before a morning draw can nudge the number up.
• Creatine supplements. Common in anyone strength training, and they raise measured creatinine without harming the kidneys.
• Intense exercise. Heavy exertion in the day or two before the draw can raise the value temporarily.
• Medications. Certain antibiotics, diuretics, some blood pressure medicines, and NSAIDs affect either true filtering or how creatinine is secreted. Bring the full medication list to the follow-up visit.
• Muscle mass in either direction. Bodybuilders read high; people with significant muscle loss, amputation, or long-term illness read low. Low creatinine in an older adult can hide meaningful kidney decline.

How to Read Your Own Report

1. Find the units. If it says mg/dL you have a United States style report; µmol/L means SI units. Do not compare a value against a range written in the other unit.
2. Convert if you need to compare with a result from another country, using this page or the value-specific pages below.
3. Check the lab's own reference range on the same line, not a range you found online.
4. Look for eGFR on the same panel. If it is present, it is the more informative number.
5. Compare with previous results. A stable value slightly outside a range is usually less concerning than a normal value that has climbed steadily.
6. Take questions to the clinician who ordered the test. Trends, medications, and hydration all shape the interpretation, and none of them appear on the printout.

Common Creatinine Conversions

Each page below answers one specific value, with the normal-range context for that result.

• 0.5 mg/dL
• 0.6 mg/dL
• 0.7 mg/dL
• 0.8 mg/dL
• 0.9 mg/dL
• 1 mg/dL
• 1.1 mg/dL
• 1.2 mg/dL
• 1.3 mg/dL
• 1.4 mg/dL
• 1.5 mg/dL
• 1.6 mg/dL
• 1.7 mg/dL
• 1.8 mg/dL
• 1.9 mg/dL
• 2 mg/dL
• 2.2 mg/dL
• 2.5 mg/dL
• 3 mg/dL
• 3.5 mg/dL
• 4 mg/dL
• 5 mg/dL
• 40 µmol/L
• 50 µmol/L
• 53 µmol/L
• 60 µmol/L
• 65 µmol/L
• 70 µmol/L
• 75 µmol/L
• 80 µmol/L
• 85 µmol/L
• 90 µmol/L
• 95 µmol/L
• 100 µmol/L
• 106 µmol/L
• 110 µmol/L
• 115 µmol/L
• 120 µmol/L
• 124 µmol/L
• 130 µmol/L
• 140 µmol/L
• 150 µmol/L
• 160 µmol/L
• 170 µmol/L
• 180 µmol/L
• 190 µmol/L
• 200 µmol/L
• 220 µmol/L
• 250 µmol/L
• 300 µmol/L
• 400 µmol/L