Creatinine Units Converter
Convert a serum creatinine value between mg/dL and µmol/L instantly, and see how your result compares with typical reference ranges for men and women.
Convert Your Creatinine Result Between mg/dL and µmol/L
Creatinine Units Formula
Where:
- \(C_{mg/dL}\) — creatinine concentration in milligrams per deciliter
- \(C_{\mu mol/L}\) — creatinine concentration in micromoles per liter
- \(88.4\) — conversion factor derived from the molecular weight of creatinine (113.12 g/mol)
Because 1 mg/dL equals 10 mg/L, or 0.01 g/L, dividing by the molecular weight 113.12 g/mol gives \(8.84 \times 10^{-5}\) mol/L, which is 88.4 µmol/L. The factor 88.4 therefore links the two units exactly.
Creatinine Units – Calculation Example
Example: a lab report shows a serum creatinine of 1.0 mg/dL and you want the value in µmol/L.
\[ C_{\mu mol/L} = 1.0 \times 88.4 = 88.4 \ \mu mol/L \]
Result: 1.0 mg/dL = 88.4 µmol/L, which falls within the typical reference range for adult men (0.74–1.35 mg/dL, 65–120 µmol/L).
How to use the calculator
- Enter your Creatinine concentration exactly as printed on the lab report.
- Choose the matching unit — mg/dL or µmol/L — in the Unit dropdown next to the input field.
- Select your Sex (for context) so the result can be compared with the appropriate reference range.
- Read the converted value in both Creatinine in mg/dL and Creatinine in µmol/L, followed by a short interpretation under What this means.
What creatinine is and why units differ
Creatinine is a waste product produced continuously by muscle metabolism and cleared from the blood almost entirely by the kidneys. Because its production is fairly constant and its removal depends on kidney function, serum creatinine is one of the most common blood markers doctors use to screen for and monitor kidney disease.
Laboratories around the world report creatinine in two different unit systems. In the United States the concentration is given in mg/dL (mass per volume), while most of Europe, Canada, Australia and much of Asia use µmol/L (amount of substance per volume, the SI convention). The two are related by the molecular weight of creatinine, so multiplying a mg/dL value by 88.4 — or dividing a µmol/L value by 88.4 — converts between them exactly.
A single creatinine number is only part of the picture. Typical adult ranges are roughly 0.74–1.35 mg/dL (65–120 µmol/L) for men and 0.59–1.04 mg/dL (52–92 µmol/L) for women, but the value depends on muscle mass, age, diet and hydration. Clinicians therefore usually interpret creatinine together with the estimated glomerular filtration rate (eGFR), which accounts for age and sex and expresses kidney function as a percentage of normal.
Quick conversion reference
| mg/dL | µmol/L | Typical meaning |
|---|---|---|
| 0.6 | 53 | Low-normal (common in women) |
| 1.0 | 88 | Mid-range for men |
| 1.5 | 133 | Above typical range — check eGFR |
| 2.0 | 177 | Clearly elevated |
| 4.0 | 354 | Markedly elevated — prompt evaluation needed |
Assumptions and limitations
- Exact conversion. The factor 88.4 follows from the molecular weight of creatinine (113.12 g/mol), so the conversion itself is exact; the calculator rounds mg/dL to two decimals and µmol/L to whole numbers.
- Reference ranges vary. The ranges shown are typical adult values only. Each laboratory sets its own range, and results also shift with age, ethnicity, muscle mass, pregnancy, diet and certain medications.
- Not a diagnosis. A single value outside the range is not proof of kidney disease — dehydration, a high-meat meal or intense exercise can temporarily raise creatinine. Always discuss abnormal results with a clinician, ideally alongside an eGFR measurement.
- Urine creatinine is different. This tool is intended for serum (blood) creatinine. Urine creatinine is reported in mmol/L or mg/24 h and requires different conversions.
If you are converting other lab results, you may also find our Testosterone Units Converter, Vitamin D Units Converter, HbA1c Converter and Cholesterol Units Converter useful — each handles the mg/dL to SI-unit conversions common on lab reports.
Frequently Asked Questions
How do I convert creatinine from mg/dL to µmol/L without a calculator?
Multiply the mg/dL value by 88.4. For example, 1.2 mg/dL × 88.4 ≈ 106 µmol/L. To go the other way, divide the µmol/L value by 88.4, so 100 µmol/L ÷ 88.4 ≈ 1.13 mg/dL. The factor comes from the molecular weight of creatinine (113.12 g/mol): 1 mg/dL equals 0.01 g/L, which divided by 113.12 g/mol gives 88.4 µmol/L.
What is a normal creatinine level in mg/dL and µmol/L?
Typical adult ranges are about 0.74–1.35 mg/dL (65–120 µmol/L) for men and 0.59–1.04 mg/dL (52–92 µmol/L) for women. Women generally have slightly lower values because of lower average muscle mass. Note that each laboratory sets its own reference range, and results also vary with age, diet, hydration and muscle mass, so always compare your result with the range printed on your own lab report.
Why do some countries report creatinine in mg/dL and others in µmol/L?
It is a difference between conventional and SI unit systems. The United States traditionally reports concentrations in mass units (mg/dL), while most of Europe, Canada, Australia and much of Asia follow the SI convention and report substance amounts (µmol/L). The two are linked exactly through the molecular weight of creatinine, so any value can be converted precisely with the factor 88.4.
Is a slightly high or low creatinine value something to worry about?
Not necessarily. A single result outside the typical range is not proof of kidney disease. Dehydration, a large meat meal, intense exercise, creatine supplements and some medications can temporarily raise creatinine, while low muscle mass, pregnancy or a vegetarian diet can lower it. Clinicians usually interpret creatinine together with eGFR. If your value is clearly elevated, discuss it with a doctor promptly.
Can I use this converter for urine creatinine or creatinine clearance?
No. This tool converts serum (blood) creatinine only. Urine creatinine is reported in different units such as mmol/L or mg per 24 hours and requires different conversion factors. Creatinine clearance and eGFR are rates (mL/min), not concentrations, and are calculated with dedicated formulas like Cockcroft-Gault or CKD-EPI, so they cannot be converted with the 88.4 factor.
How do I convert creatinine from µmol/L to mmol/L?
Divide the µmol/L value by 1000, since 1 mmol equals 1000 µmol. For example, 120 µmol/L is 0.12 mmol/L. Some European labs report creatinine in mmol/L instead of µmol/L; to convert that to mg/dL, first multiply by 1000 to get µmol/L, then divide by 88.4 — so 0.10 mmol/L ≈ 1.13 mg/dL.
What are the most common mistakes when converting creatinine units?
The biggest one is mixing up creatinine with BUN (urea) or uric acid conversions — each analyte has its own factor because their molecular weights differ. Another common error is entering a urine creatinine value or a creatinine clearance rate. Also check whether your report uses µmol/L or mmol/L before typing the number, since mixing them up changes the result by a factor of 1000.