Ammonia µmol/L → µg/dL
Convert ammonia from µmol/L to µg/dL
Sources last checked: 2026-11-03
Ammonia µmol/L → µg/dL
Convert ammonia from µmol/L to µg/dL
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Ammonia µmol/L → µg/dL?
Many European laboratories and hepatology guidelines express plasma ammonia in µmol/L, while many laboratories in Turkey and the USA use µg/dL. This converter divides by 0.5872 (about × 1.703), the factor derived from the molar mass of ammonia (NH₃, 17.031 g/mol). The µg/dL result is expressed as NH₃.
When to use it
- Translating a µmol/L ammonia from a European report into the µg/dL unit used by your laboratory
- Comparing values across hospitals or before and after a laboratory change
- Reading US literature on hepatic encephalopathy or inborn errors of metabolism
- Teaching and exam preparation
When not to use it
- When your laboratory reports µg/dL as ammonium or as ammonia nitrogen — the target unit then has a different mass basis
- Capillary or haemolysed samples, which are unreliable regardless of unit
- Deciding on treatment from ammonia alone; clinical grading of encephalopathy does not rest on a single value
How it is calculated
Ammonia (µg/dL) = ammonia (µmol/L) ÷ 0.5872
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- 1 µmol/L ≈ 1.703 µg/dL; 45 µmol/L ≈ 77 µg/dL.
- Round µg/dL to whole numbers.
- Pre-analytical handling (ice, rapid centrifugation, no haemolysis) matters more than the conversion: delayed samples give falsely high values.
- Reference ranges and action thresholds are method-, age- and guideline-dependent and should be taken from the source in its original unit.
Frequently asked questions
How do I convert ammonia from µmol/L to µg/dL?
Divide by 0.5872. For example, 45 µmol/L ÷ 0.5872 = 77 µg/dL and 120 µmol/L ÷ 0.5872 = 204 µg/dL.
What is 1 µmol/L of ammonia in µg/dL?
About 1.703 µg/dL: one micromole of NH₃ weighs 17.031 µg, and 1 L contains 10 dL.
Is venous ammonia acceptable?
Many laboratories accept venous plasma; arterial and venous values can differ. The unit conversion is identical for both, but compare like with like when following trends.
Evidence and guidelines
Have a follow-up question?
Medelix answers clinical questions from current guidelines and studies — every statement with its source.
Related calculators
- Ammonia µg/dL → µmol/LConvert ammonia from µg/dL to µmol/L
- Child-Pugh scoreSeverity of chronic liver disease / cirrhosis (class A, B, C)
- MELD-Na (OPTN 2016)MELD with serum sodium — US liver allocation 2016–2023
- Maddrey discriminant functionSeverity of alcohol-associated hepatitis — who may benefit from corticosteroids
Embed this calculatorFree to use on your website, intranet or teaching page. Copy the code below.
<iframe src="https://medelix.ai/en/embed/ammonia-umol-to-ugdl" title="Ammonia µmol/L → µg/dL – Medelix" width="100%" height="620" style="border:0;max-width:720px" loading="lazy"></iframe>
<p><a href="https://medelix.ai/en/calculators/ammonia-umol-l-to-ug-dl">Ammonia µmol/L → µg/dL calculator by Medelix</a></p>For healthcare professionals and medical students. These tools support, and do not replace, clinical judgement. Always check results against the original source and your local protocols.