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Free health tool

Uric acid unit converter

Convert an existing serum or plasma uric acid result between mg/dL, µmol/L and mmol/L without interpreting the value or adding a health label.

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Calculate your result

Enter the serum or plasma uric acid number exactly as it appears on the source laboratory report.

Accepted range: 0 to 100 mg/dL uric acid

Your result will appear here

Nothing is saved or added to the URL.

What this result means

Choose the unit on the laboratory report, enter the uric acid value, and the converter will express the same concentration in the selected equivalent unit. One mg/dL equals 59.48 µmol/L or 0.05948 mmol/L. [1][2][3]

What the three units mean

mg/dL expresses uric acid mass in a decilitre. µmol/L and mmol/L express amount of uric acid substance in a litre. The prefixes differ by 1,000: one mmol/L equals 1,000 µmol/L. Changing the unit does not change the sample or the underlying concentration. [1][2]

Why uric acid uses 59.48

NIST lists a uric acid molecular weight of 168.1103. Combining that molecular weight with the mass and volume prefixes gives about 59.48 µmol/L for each 1 mg/dL, the clinical conversion factor independently used in peer-reviewed uric acid research. [1][2][3]

The factor is specific to uric acid. It must not be reused for glucose, creatinine, cholesterol or another biomarker because each substance has a different molecular weight. [1][2]

Choose µmol/L or mmol/L exactly as printed

µmol/L is one thousand times the numeric value in mmol/L. For example, 380 µmol/L is 0.380 mmol/L. Check the prefix on the report before converting; confusing µmol with mmol creates a thousand-fold error. [2]

How the result is rounded

The calculator uses exact decimal arithmetic with the published rounded factor, then rounds once for display. The shown decimals make the calculation transparent but cannot add precision that the source laboratory did not report. [1][3]

What the conversion cannot tell you

The converted number does not classify the result and cannot diagnose gout, kidney stones or kidney disease. Reference intervals and treatment targets are separate questions that depend on the laboratory, reason for testing and individual clinical context.

A concentration conversion is also not a 24-hour urine conversion. Urine volume, collection duration and reporting basis introduce different inputs and units, so mg/day and mmol/day are deliberately excluded.

Safe next steps

Keep the original value, unit, laboratory reference interval and test date beside the converted number. Use the conversion only to compare like with like. For interpretation or a care decision, use the complete original report and qualified professional advice.

Formula and assumptions

Formula
µmol/L = mg/dL × 59.48; mg/dL = µmol/L ÷ 59.48. mmol/L = mg/dL × 0.05948; mg/dL = mmol/L ÷ 0.05948. mmol/L = µmol/L ÷ 1,000; µmol/L = mmol/L × 1,000. [1][2][3]
Version
Serum uric acid mass-to-amount unit conversion, nist-urate-clinical-unit-conversion-v1
Rounding
Use exact decimal arithmetic with the declared factor or stored reciprocal, then round once: two decimals for µmol/L and mg/dL, three decimals for mmol/L. Exact halfway ties round upward in magnitude; a positive value below display resolution uses a less-than result.
Worked example
For 6 mg/dL: 6 × 59.48 = 356.88 µmol/L. The same concentration is 0.35688 mmol/L, displayed as 0.357 mmol/L. These are unit equivalents, not a health classification. [3]

Who this is for — and when not to use it

Intended use

Neutral, reversible unit conversion for a person who already has a serum or plasma uric acid result in mg/dL, µmol/L or mmol/L and needs the equivalent reporting unit.

Not intended for

This tool does not interpret uric acid, diagnose gout or kidney disease, apply a reference range or treatment target, assess symptoms, convert a urine collection or choose or adjust medication or treatment.

Exclusions

  • Uric acid interpretation, health bands, reference ranges and treatment targets
  • Diagnosis or probability of gout, kidney stones, kidney disease or another condition
  • Urine uric acid, 24-hour collections, mg/day, mmol/day or clearance calculations
  • Medication, treatment, diet or urgent-care decisions
  • Any analyte other than uric acid or serum urate
  • Changing, correcting or reconstructing precision absent from the source laboratory result

Evidence sources

  1. 1. NIST Chemistry WebBook, SRD 69: Uric acid — National Institute of Standards and Technology. Accessed Aug 10, 2026.
  2. 2. Sixth Report on Human Biomonitoring of Environmental Chemicals in Canada: Appendix B conversion factors — Health Canada. Accessed Aug 10, 2026.
  3. 3. Empagliflozin lowers serum uric acid in chronic kidney disease: exploratory analyses from the EMPA-KIDNEY trial — Nephrology Dialysis Transplantation. Accessed Aug 10, 2026.