Haemoglobin g/dL → g/L

Convert haemoglobin from g/dL to g/L

Sources last checked: 2026-11-03

Haemoglobin g/dL → g/L

Convert haemoglobin from g/dL to g/L

Haemoglobin (g/dL)

Fill in every field to see the result.

Converts units only; reference ranges depend on the laboratory, the assay and the patient.

Source: BIPM. The International System of Units (SI), 9th edition, 2019 — Table 8 (non-SI units accepted for use with the SI, incl. litre) and the definition of the kelvin and degree Celsius.Open

What is the Haemoglobin g/dL → g/L?

Haemoglobin is reported in g/dL in Germany, Austria, Turkey and the USA, and in g/L in the UK, Scandinavia and many other European countries. Because 1 dL is 0.1 L, the conversion is an exact factor of 10 — but confusing the two is one of the classic transcription errors in transfusion documentation.

When to use it

Reading UK, Scandinavian or SI-based guidelines and studies that quote Hb in g/L
Sending results to a colleague or registry that expects g/L
Checking a value before entering it into a form or score with a fixed unit

When not to use it

Conversion to mmol/L (Netherlands) — use the molar converter
HbA1c, which is not a haemoglobin concentration

How it is calculated

Haemoglobin (g/L) = Hb (g/dL) × 10

Clinical pearls and limitations

Converts units only; reference ranges depend on the laboratory, the assay and the patient.
g/L = g/dL × 10; g/L values are usually reported as whole numbers.
A missing or misplaced factor of 10 between g/dL and g/L changes the clinical meaning completely; electronic forms with free-text units are a known source of this error.
Transfusion triggers in guidelines are stated in the guideline's own unit; check which one before comparing.
The same factor applies to other proteins reported in g/dL vs g/L, such as albumin and total protein.

Frequently asked questions

How do I convert haemoglobin from g/dL to g/L?

Multiply by 10. Example: 13.5 g/dL = 135 g/L; 9.2 g/dL = 92 g/L.

Is g/dL the same as g/100 mL?

Yes. 1 dL = 100 mL = 0.1 L, so g/dL and g/100 mL are identical.

Why do some countries use g/L?

g/L follows the SI recommendation to use the litre as the reference volume; countries that adopted SI units for routine labs switched to it, others kept g/dL.

Evidence and guidelines

Primary source: BIPM. The International System of Units (SI), 9th edition, 2019 — Table 8 (non-SI units accepted for use with the SI, incl. litre) and the definition of the kelvin and degree Celsius.

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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.