Pet Glucose Converter

Convert glucose readings between mg/dL and mmol/L for diabetic dogs and cats.

mmol/L (millimoles per litre)

Used in Canada, UK, Australia, Europe

mg/dL (milligrams per decilitre)

Used in the United States

Quick Reference:

Typical pet target range:5–12 mmol/L

Same in mg/dL:90–220 mg/dL

Hypoglycemia (critical):< 4 mmol/L or < 70 mg/dL

Note: Always ask your vet what target range is right for your pet—this varies by individual.

Understanding the numbers

UK readings are usually shown in mmol/L, while US readings are usually shown in mg/dL. The units differ, but the underlying glucose measurement is the same.

Reference ranges depend on species, timing, treatment and the individual pet. Commonly referenced target ranges are dogs 5.0–12.0 mmol/L and cats 5.0–10.0 mmol/L, referenced to WSAVA and ACVIM guidance. Your vet interprets your pet's readings.

Below 3.3 mmol/L is a critical low needing immediate veterinary contact. If your pet is weak, wobbly, trembling, confused, collapsed or seizing, treat it as an emergency.

Common questions

How do I convert mg/dL to mmol/L?

Divide the mg/dL reading by 18 to get an approximate mmol/L value. Use the converter above and discuss readings with your vet.

Why do glucose readings use different units?

The UK and many other countries use mmol/L, while the US commonly uses mg/dL. They describe the same measurement using different scales.

What is a critical low glucose reading?

Below 3.3 mmol/L is a critical low needing immediate veterinary contact. If your pet seems unwell, follow your emergency plan and contact a vet immediately.