Blood sugar by number

20.1 mmol/L

= 362 mg/dL

Very high

A glucose reading of 20.1 mmol/L is 362 mg/dL (362.1 before rounding; 1 mmol/L = 18.01559 mg/dL). It is 10.1 mmol/L above the top of the target range (10.0).

20.1 mmol/L against each published threshold

Threshold20.1 mmol/L is
CGM target range, 2019 international consensusVery high (above 13.9 mmol/L)
ADA goal before meals, many adults with diabetes: 4.4–7.2Above the goal
ADA goal for the peak after meals: below 10.0Above the goal
Fasting lab test (no food for 8 h)In the diabetes range (7.0 or above)
2 hours into a 75 g glucose testIn the diabetes range (11.1 or above)

The CGM range and the ADA goals are for people who have diabetes; a care team can set different ones. The two lab tests are how diabetes is diagnosed, on a plasma sample, and ADA asks for two abnormal results unless the high glucose is unmistakable. One meter or CGM reading does not diagnose anything.

Above 11.1

ADA advises people at risk of DKA to measure ketones when there are symptoms or a likely cause, such as illness or a missed insulin dose, “particularly if glucose levels exceed 11.1 mmol/L”.

Values near 20.1